Anhydrous fracturing truck and high-recovery-rate oil and gas exploitation method based on anhydrous fracturing truck

Abstract

The invention discloses an anhydrous fracturing truck and a high-recovery-rate oil and gas exploitation method based on the anhydrous fracturing truck, and relates to the technical field of mineral exploitation, the anhydrous fracturing truck comprises a nitrogen-making pressurization truck set, a microemulsion preparation mechanism and a laser microemulsion sprayer, and the laser microemulsion sprayer comprises a laser emitter and a mixing container; a first mixing cavity and a second mixing cavity are formed in the mixing container; the outlet end of the nitrogen-making pressurizing vehicle group is communicated with the first mixing cavity; the outlet end of the microemulsion preparation mechanism is communicated with the first mixing cavity; the laser transmitter is optically communicated with the first mixing cavity; the first mixing cavity is communicated with the second mixing cavity through an injection channel; the second mixing cavity is provided with a fracturing medium outlet. Anhydrous fracturing is carried out by means of high-pressure nitrogen along with injection of the nanometer dissolving agent microemulsion, a picometer volume network fracture system is formed in a larger well spacing range by means of the high infiltration capacity of picometer-level dissolving agent particles so as to wave the whole reservoir, 90% or above of the volume of the whole reservoir can be wave after several years of mining, the recovery rate can reach 85% or above, and the recovery rate can reach 85% or above. And the method can also be used for deep geothermal exploitation.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral mining, and in particular to a waterless fracturing vehicle and an oil and gas high recovery rate mining method based on the waterless fracturing vehicle. Background Art

[0002] In the field of oil and gas, methane hydrate, and geothermal water mining, as resource reserves gradually decrease and mining conditions become increasingly complex, traditional mining technologies can no longer meet the current mining conditions. There are many problems in oil field production. The recovery rate of oil mining for decades is only about 40%, and 60% of the oil cannot be recovered; the permeability of reservoir rocks is extremely low, most of which are only 0.05 millidarcy, and a large amount of adsorbed oil and gas cannot be recovered.

[0003] In order to increase the production of oil and gas wells, people invented the fracturing technology. Through experimental research on the fracturing technology and the problems existing in the current oil and gas well fracturing, the current problems of oil and gas well fracturing include: the oil field has high water content, the oil is in the upper layer, the water is in the lower layer, and the pre-fluid injected by fracturing is difficult to contact the oil in the upper layer; currently, fracturing only generates a few main fractures, and it is impossible to form nano-network volume fractures. The best fracturing fluid can only affect the volume within 20 meters from the well. The distance between wells is generally about 100 meters to 500 meters. The affected range is very small and the dead oil zone is large; the current water consumption of fracturing is too large, resulting in serious waste of water resources and environmental pollution; the cost of fracturing is high, and at least 5 fracturing trucks are required for fracturing, and shale fracturing requires dozens to hundreds of fracturing trucks.

[0004] Fracturing methods are divided into two categories: hydraulic fracturing and high-energy gas fracturing. Existing fracturing vehicles can only perform liquid medium fracturing, but not gas medium fracturing.

[0005] Therefore, how to provide a waterless fracturing vehicle and a high-recovery oil and gas production method based on the waterless fracturing vehicle, which can achieve waterless fracturing by improving the fracturing process technology, using high-pressure nitrogen and injecting nano-solvent microemulsion, and realizing that picometer-scale solvent particles form a connected picometer volume network fracture system in a larger well spacing range to affect the entire oil and gas field reservoir, thereby improving the recovery rate of the entire oil and gas field reservoir is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention proposes a waterless fracturing vehicle and a high oil and gas recovery method based on the waterless fracturing vehicle, aiming to solve the technical problem that traditional fracturing devices and fracturing processes cannot effectively improve the oil, gas and water recovery rates.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] In one aspect, the present invention provides a waterless fracturing vehicle, comprising:

[0009] Nitrogen production and pressurization vehicle group, used to prepare nitrogen and pressurize nitrogen and inject it into the well to be fracturing for waterless fracturing;

[0010] A microemulsion preparation mechanism, used for preparing a nano-solvent into a nano-scale microemulsion and outputting it under pressure;

[0011] A laser microemulsion sprayer, comprising a laser emitter and a mixing container; a first mixing chamber and a second mixing chamber are arranged in the mixing container; the outlet end of the nitrogen-generating and pressurizing vehicle group is connected to the first mixing chamber so as to inject nitrogen into the first mixing chamber; the outlet end of the microemulsion preparation mechanism is connected to the first mixing chamber so as to inject nano-scale microemulsion into the first mixing chamber and perform gas-liquid collision mixing with the input nitrogen; the laser emitter is optically connected to the first mixing chamber so as to emit laser into the first mixing chamber and ablate nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; the first mixing chamber is connected to the second mixing chamber through an injection channel so as to inject picometer-scale microemulsion and nitrogen into the second mixing chamber and perform spray collision mixing to form a picometer-scale microemulsion nitrogen mixture;

[0012] The second mixing chamber has a fracturing medium outlet which can be connected to the well to be fractured and inject pressurized nitrogen mixed with picometer-level microemulsion into the well to be fractured for waterless fracturing.

[0013] The waterless fracturing vehicle of the present invention adopts high-pressure nitrogen and nano-dissolving agent injection mode to perform nitrogen waterless fracturing; wherein, the nitrogen-making and pressurizing vehicle group is used to prepare nitrogen and pressurize the nitrogen to a certain high-pressure state and inject it into the first mixing chamber; the microemulsion preparation mechanism is used to prepare the nano-dissolving agent into a nano-scale microemulsion in a microemulsion state and pressurize it into the first mixing chamber; the first mixing chamber of the laser microemulsion sprayer serves as a collision mixing chamber for high-pressure jet nitrogen and high-pressure jet nano-scale microemulsion, and also serves as a laser ablation chamber; the laser emitter emits laser into the first mixing chamber to evaporate or crush the nanoparticles in the nano-scale microemulsion into picometer-scale particles to form a picometer-scale microemulsion, and the picometer-scale microemulsion is sprayed into the second mixing chamber together with nitrogen for further collision and mixing to form a picometer-scale microemulsion nitrogen mixture; the picometer-scale microemulsion nitrogen mixture can be injected from the fracturing medium outlet of the second mixing chamber into the well to be fractured for waterless fracturing. The method for converting nanoparticles in the nano-scale microemulsion of the present invention into picometer particles includes a physical method (high-energy collision, laser ablation) and a biological method (biomineralization); the high-energy collision includes spraying collision when the microemulsion preparation mechanism pressurizes and sprays the nano-scale microemulsion into the first mixing chamber, high-pressure nitrogen collision, and liquid atomization and spraying collision during the process of spraying into the second mixing chamber; laser ablation is to irradiate the nanoparticles of the microemulsion with a laser beam with strong penetrating power, and the nanoparticles are evaporated or broken into picometer particles through the interaction between the laser and the nanoparticles of the microemulsion; biomineralization is because the nano-solvent itself is a bio-based material, and the bio-based material is used as a catalyst to remove heavy metal ions in petroleum molecules, so that the particles of the petroleum molecules are converted into picometer particles, which do not adhere to rocks at all, and the viscosity of the petroleum is lower, and the heavy metal ions in the reservoir pores are separated, so that the nano-pores of the reservoir are more unobstructed. The picometer-scale microemulsion prepared by the waterless fracturing truck is both an oil-soluble and water-soluble dispersion system, and also has a high interfacial area, stable thermodynamic properties and strong solubility; the picometer-scale microemulsion is aimed at the problems of almost empty oil wells, more water and less oil, and oil floating on the upper layer. The picometer-scale microemulsion is more oil-soluble than water-soluble, has higher penetration, and can penetrate oil, dense rocks, coal and shale. It can also greatly enhance solubility, and it is easier to dissolve rocks and increase permeability when it is close to the rock wall. Oil is more easily absorbed when it is close to the rock wall. It is easy to dissolve petroleum and improve the sweep coefficient. The picometer-scale microemulsion can be combined with high-pressure nitrogen injection to achieve picometer-scale waterless fracturing. The present invention uses a waterless fracturing vehicle to pressurize and inject the picometer-scale microemulsion nitrogen mixture into the well to be fractured. Under the strong displacement of the high-pressure nitrogen, the picometer-scale particles of the microemulsion eventually form a connected picometer volume network fracture system in the oil and gas field reservoir at a larger well spacing, thereby sweeping the entire oil and gas field reservoir, thereby being able to improve the recovery rate of the entire oil and gas field reservoir.

[0014] As a further improvement of the above technical solution, the laser microemulsion sprayer further includes a first nozzle and a second nozzle;

[0015] The mixing container has a first inlet, a second inlet and a laser inlet connected to the first mixing chamber, and a fracturing medium outlet connected to the second mixing chamber; an injection channel is provided between the first mixing chamber and the second mixing chamber;

[0016] The first nozzle is installed in the first inlet, and the outlet end of the microemulsion preparation mechanism is connected to and communicates with the first nozzle, so as to spray the nano-scale microemulsion into the first mixing chamber through the first nozzle;

[0017] The outlet end of the nitrogen-generating and pressurizing vehicle group is connected to and communicates with the second inlet to inject nitrogen into the first mixing chamber;

[0018] The laser emitting end of the laser emitter is connected to the laser inlet to emit laser light into the first mixing cavity to ablate the nanoparticles in the nanoscale microemulsion to generate picometer-scale particles;

[0019] The second nozzle is installed at the channel opening of the injection channel corresponding to the second mixing chamber to inject picometer-level microemulsion and nitrogen into the second mixing chamber for spraying, collision and mixing to form a picometer-level microemulsion nitrogen mixture.

[0020] As a further improvement of the above technical solution, the microemulsion preparation mechanism includes a first microemulsion booster pump, a second microemulsion booster pump and a liquid storage tank for filling the nano-solvent;

[0021] The first microemulsion booster pump is cyclically connected to the liquid storage tank to cyclically pump out the nano-solvent in the liquid storage tank, and the nano-solvent gradually forms a nano-scale microemulsion under the action of stirring and collision;

[0022] The inlet end of the second microemulsion booster pump is connected to the liquid storage tank, and the outlet end of the second microemulsion booster pump is connected to and communicated with the first nozzle, so as to pressurize and spray the nano-scale microemulsion in the liquid storage tank into the first mixing chamber through the first nozzle for collision mixing.

[0023] The beneficial effects of the above technical solution are as follows: the first microemulsion booster pump sucks the nano-solvent liquid in the liquid storage tank into the pump head, and forms a nano-scale microemulsion inside the pump head through the high-speed stirring pulse of the pump head blades, and the nano-scale microemulsion is subjected to high-energy collision in the liquid storage tank by pressurized pumping, thereby obtaining a more uniform nano-scale microemulsion, and at the same time, a part of the nano-scale particles of the microemulsion can be broken into picometer-scale particles. The second microemulsion booster pump pressurizes the uniform nano-scale microemulsion and sprays it into the first mixing chamber at high speed, so as to collide with the cavity wall and the high-speed jet nitrogen again, further breaking the nano-scale particles and mixing them.

[0024] As a further improvement of the above technical solution, there are multiple laser microemulsion sprayers, and the multiple laser microemulsion sprayers are connected and communicated in sequence to form a laser microemulsion sprayer group with a multi-stage series structure. The laser microemulsion sprayer group is connected and communicated with the microemulsion preparation mechanism and the outlet end of the nitrogen-making and boosting vehicle group, so that the size of the nanoparticles in the nano-scale microemulsion is gradually refined and reduced through the laser ablation action of the multiple laser microemulsion sprayers in sequence.

[0025] The beneficial effect of the above technical solution is that multiple laser microemulsion sprayers are connected in series in sequence, so that the size of nanoparticles in the nanoscale microemulsion can be gradually refined and reduced through the laser ablation effect and high-speed and high-energy collision effect of multiple laser microemulsion sprayers, producing picometer-level microemulsion nitrogen mixtures, femtometer-level microemulsion nitrogen mixtures and atm-level microemulsion nitrogen mixtures, further improving the sweep coefficient of waterless fracturing, and under the strong displacement of high-pressure nitrogen, forming a connected picometer, femtometer and atm volume network fracture system in a larger well spacing range, thereby achieving the purpose of improving the recovery rate of the entire oil and gas field reservoir.

[0026] As a further improvement of the above technical solution, the laser microemulsion sprayer group includes a first-stage laser microemulsion sprayer and a second-stage laser microemulsion sprayer;

[0027] The first-stage laser microemulsion sprayer includes a first laser emitter and a first mixing container; a first mixing chamber A and a second mixing chamber A are provided in the first mixing container; the outlet end of the nitrogen-generating and pressurizing vehicle group is connected to the first mixing chamber A so as to inject nitrogen into the first mixing chamber A; the outlet end of the microemulsion preparation mechanism is connected to the first mixing chamber A so as to inject nano-scale microemulsion into the first mixing chamber A and perform gas-liquid collision mixing with the input nitrogen; the first laser emitter is optically connected to the first mixing chamber A so as to emit laser into the first mixing chamber A and ablate nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; the first mixing chamber A is connected to the second mixing chamber A through the injection channel A so as to inject picometer-scale microemulsion and nitrogen into the second mixing chamber A and perform spray collision mixing to form a picometer-scale microemulsion nitrogen mixture;

[0028] The second-stage laser microemulsion sprayer includes a second laser emitter and a second mixing container; a first mixing chamber B and a second mixing chamber B are provided in the second mixing container; the second mixing chamber A is connected to the first mixing chamber B through a pipeline and communicates with the first mixing chamber B to spray a picometer-scale microemulsion nitrogen mixture; the second laser emitter is optically connected to the first mixing chamber B to emit laser into the first mixing chamber B and ablate the picometer-scale particles in the picometer-scale microemulsion nitrogen mixture to generate femtometer-scale particles, thereby forming a femtometer-scale microemulsion nitrogen mixture; the first mixing chamber B is connected to the second mixing chamber B through an injection channel B to spray a femtometer-scale microemulsion nitrogen mixture into the second mixing chamber B; the second mixing chamber B has a fracturing medium outlet B that can be connected to the well to be fractured and inject pressurized nitrogen mixed with femtometer-scale microemulsion into the well to be fractured for waterless fracturing.

[0029] The beneficial effects of the above technical solution are: the nitrogen-making and pressurizing vehicle group is used to inject high-pressure nitrogen into the first mixing chamber A, which serves as a high-pressure nitrogen supply unit and is used to provide fracturing pressure. The nano-scale microemulsion can be processed into a picometer-scale microemulsion through the first-stage laser microemulsion sprayer, and the output of the picometer-scale microemulsion nitrogen mixture can be realized; the picometer-scale microemulsion can be processed into a femtometer-scale microemulsion through the second-stage laser microemulsion sprayer, and the output of the femtometer-scale microemulsion nitrogen mixture can be realized; by connecting and arranging the two-stage laser microemulsion sprayer, the particle size of the solvent in the microemulsion is further refined, the penetration is enhanced, and the scope of the fracture system is increased, thereby achieving a high recovery rate.

[0030] As a further improvement of the above technical solution, the laser microemulsion sprayer group further includes a third-stage laser microemulsion sprayer;

[0031] The third-stage laser microemulsion sprayer includes a third laser emitter and a third mixing container; a first mixing chamber C and a second mixing chamber C are arranged in the third mixing container; a fracturing medium outlet B of the second mixing chamber B is connected through a pipeline and communicated with the first mixing chamber C to spray in a femtoscale microemulsion nitrogen mixture; the third laser emitter is optically connected with the first mixing chamber C to emit a laser into the first mixing chamber C and ablate the femtoscale particles in the femtoscale microemulsion nitrogen mixture to generate ammeter-scale particles, thereby forming an ammeter-scale microemulsion nitrogen mixture; the first mixing chamber C is connected with the second mixing chamber C through an injection channel C to spray in an ammeter-scale microemulsion nitrogen mixture into the second mixing chamber C; the second mixing chamber C has a fracturing medium outlet C that can be connected to a well to be fractured and inject pressurized nitrogen mixed with ammeter-scale microemulsion into the well to be fractured for waterless fracturing.

[0032] The beneficial effect of the above technical solution is that the output of the microemulsion nitrogen mixture at the ammeter level can be achieved through the third-stage laser microemulsion sprayer, further increasing the scope of the fracture system and thus improving the recovery rate. By connecting and arranging the three-stage laser microemulsion sprayer, the particle size of the solvent can be gradually ablated, fragmented and mixed, and the particle size consistency in the microemulsion is also improved. While improving the penetration, the fracture system can be more evenly extended from the injection point to the surrounding areas.

[0033] As a further improvement of the above technical solution, the first laser emitter, the second laser emitter and the third laser emitter are any one of a semiconductor solid laser with an emission wavelength of 450nm and a power of 40W, a krypton laser with an emission wavelength of 6471 angstroms, a red laser with a wavelength of 620-750nm and a pulse duration ≤1ms, and an infrared laser.

[0034] The beneficial effects of the above technical solution are: the semiconductor solid-state laser has a power of 40W and a wavelength of 450nm, and has the characteristics of high voltage resistance, high efficiency, long life, high beam quality, good stability, compact and miniaturized structure; the krypton laser can emit a red laser with a wavelength of 6471 angstroms, which has extremely strong penetration and can penetrate fog for 300 meters and has a range of 136 kilometers; the red laser emits a red laser with a wavelength of 620-750nm, a frequency of 480-405MHz, and a pulse duration of ≤1ms, which has the characteristics of long wavelength, low energy, weak cutting force, and high penetration.

[0035] Another aspect of the present invention provides a high recovery method for oil and gas based on a waterless fracturing vehicle, comprising the following steps:

[0036] S1: Adopt the huff-and-puff method for production; select suitable nano-solvents according to the type of oil and gas field to be produced; use a waterless fracturing vehicle to make the nano-solvents into a picometer-scale microemulsion nitrogen mixture, and inject the picometer-scale microemulsion nitrogen mixture into the production well for waterless fracturing; and use the injected nitrogen to propel the picometer-scale particles of the solvent in the microemulsion to diffuse from the injection point to the surrounding area, create picometer-scale cracks in the oil and gas field reservoir, and form a picometer volume network fracture system to increase the swept volume coefficient, thereby improving the recovery rate of the entire oil and gas field;

[0037] S2: Shut down the well for more than ten days and then reopen it for production.

[0038] As a further improvement of the above technical solution, S1 specifically includes:

[0039] S11: Nano-solvents include oil nano-solvents and rock nano-solvents; the main function of oil nano-solvents is to make oil completely non-adhesive to rocks and reduce oil viscosity; rock nano-solvents are mainly used to increase the permeability of reservoir rocks; oil nano-solvents include heavy oil nano-solvents, thin oil nano-solvents, residual oil nano-solvents, oil shale oil nano-solvents, oil sand oil nano-solvents, and tight oil nano-solvents; rock nano-solvents include sandstone nano-solvents, carbonate rock nano-solvents, coal rock nano-solvents, shale nano-solvents, and combustible ice supercooled nano-solvents; When exploiting oil fields, use suitable petroleum nano-solvents; when exploiting heavy oil, use heavy oil nano-solvents; when exploiting light oil, use light oil nano-solvents; when exploiting residual oil, use residual oil nano-solvents; when exploiting oil shale oil, use oil shale oil nano-solvents; when exploiting oil sand oil, use oil sand oil nano-solvents; when exploiting tight oil fields, use petroleum nano-solvents and rock nano-solvents; when exploiting tight gas fields, use rock nano-solvents; when exploiting coalbed methane, use coal rock nano-solvents; when exploiting shale gas, use shale nano-solvents; when exploiting combustible ice methane gas, use combustible ice supercooled nano-solvents;

[0040] S12: Many production wells are arranged throughout the oil and gas field. The amount of nano solvent injected into each production well is 0.8% of the pore volume of the reservoir 50 meters away from the production well. The ratio of the volume flow rate of the injected nano solvent to the volume flow rate of the injected nitrogen is less than one-third. The injection time of waterless fracturing is 5 to 6 days.

[0041] S13: adding a nano-solvent suitable for the type of oil and gas field to be exploited into a liquid storage tank (23); starting the first microemulsion booster pump (21), sucking the nano-solvent liquid in the liquid storage tank (23) into the interior of the pump head of the first microemulsion booster pump (21), forming a microemulsion inside the pump head through the stirring pulse of the pump head blades, and then returning the microemulsion to the liquid storage tank (23), and forming a nano-scale microemulsion through repeated pumping and collision pulses;

[0042] S14: Start the nitrogen-generating and pressurizing vehicle group (1) to produce nitrogen and pressurize the nitrogen, and pump the pressurized nitrogen into the first mixing chamber (321) of the laser microemulsion sprayer (3); after the flow rate of the pumped nitrogen is stable, start the second microemulsion booster pump (22) to pump the nano-scale microemulsion in the liquid storage tank (23) into the first mixing chamber (321) for gas-liquid collision mixing; start the laser emitter (31), emit laser into the first mixing chamber (321) and ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles to produce picometer-scale microemulsion; the pressurized nitrogen carries the picometer-scale microemulsion and is sprayed from the injection channel into the second mixing chamber (322) for collision mixing; and then flows into the well through the fracturing medium outlet (326) of the second mixing chamber (322), and then is pressurized into the formation for waterless fracturing;

[0043] S2 specifically includes:

[0044] S21: After the completion of waterless fracturing, the wells are shut down for more than ten days, and all production wells are opened for production for 8 to 10 years;

[0045] S22: Arrange injection wells, which are nitrogen injection wells. All nitrogen injection wells are mainly swallowed, that is, waterless fracturing is carried out by using a waterless fracturing truck and adopting the intermittent alternating injection method of pressurized nitrogen carrying picometer-level microemulsion injection and pure pressurized nitrogen injection. The injection is continuous for 8 to 10 years and is carried out simultaneously with the waterless fracturing and production process of the production wells;

[0046] S23: When the recovery rate of the entire oil and gas field reaches more than 90%, it can be converted into geothermal water for heating or power generation; or it can be converted into an underground oil and gas reservoir to store oil and gas.

[0047] As a further improvement of the above technical solution, S22 specifically includes:

[0048] When exploiting heavy oil, thin oil, residual oil, oil shale oil, oil sand oil, tight oil field, tight gas field, coalbed methane, shale gas and combustible ice methane, the injection wells and production wells are arranged using the multi-point well pattern method; the central well of the multi-point well pattern is a nitrogen injection well, and the surrounding wells are production wells. All production wells and injection wells in the entire oil and gas field need to be subjected to waterless fracturing;

[0049] S23 specifically includes: using a several-point well network method to arrange injection wells and production wells, with the central well of the well network being the reinjection well and the surrounding wells being water production wells; selecting rock nano-dissolving agents and using a waterless fracturing vehicle to inject nitrogen into both the reinjection well and the water production well and concurrently inject rock nano-dissolving agents to perform waterless fracturing, building a picometer volume network fracture system in the entire hot dry rock geothermal layer between the reinjection well and the water production well, forming an underground U-shaped tube structure between the reinjection well, the hot dry rock geothermal layer connected to the reinjection well, and the water production well connected to the hot dry rock geothermal layer, and using the U-shaped tube structure for injection and production to displace the heat of the formation for heating or power generation.

[0050] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a waterless fracturing vehicle and a high oil and gas recovery method based on the waterless fracturing vehicle, which has the following advantages and beneficial effects:

[0051] 1. The present invention provides a waterless fracturing vehicle and a method for rapid high-recovery oil, gas and water production based on the fracturing vehicle. The nitrogen-making and boosting vehicle group of the waterless fracturing vehicle can be designed to include 1-3 nitrogen-making and boosting vehicles for combination. The first microemulsion boosting pump of the waterless fracturing vehicle uses a microemulsion method to pump and circulate in large volume to make the solvent a nano-scale solvent microemulsion. The microemulsion is non-toxic, residue-free, has good miscibility, good thermodynamic stability, and good uniformity of nano-scale particle size. Water resources are extremely scarce in many areas, and waterless fracturing uses only a trace amount of water, which saves a lot of water and a lot of costs. It is particularly important in areas with water shortages, and is extremely low-cost, low-carbon, green and environmentally friendly. In the later stage of oil field development, a large amount of water rises, and the microemulsion is more likely to contact the oil in the middle and upper layers of the formation, increasing the adsorption amount on the oil interface, making the oil dissolve more quickly, and improving the oil recovery rate faster and higher.

[0052] 2. The present invention realizes safe, environmentally friendly, efficient and low-cost fracturing. Through the waterless fracturing vehicle, nitrogen can be produced and used as the injection medium, which can avoid sand plugging, sand sinking, collapse, plugging of pore throats, waste of water resources and acidification of harmful formations. Nitrogen is one of the most common gases on earth, accounting for about 78% of the total atmospheric volume. Nitrogen has stable chemical properties and has no corrosive effect on pipelines. Nitrogen itself is colorless, odorless, non-toxic, stable, non-flammable and non-explosive, prevents underground combustion of flammable gases, and reduces safety risks. Nitrogen molecules have a small diameter and are easily adsorbed on oil and rocks. Waterless fracturing is carried out by injecting nitrogen with nano-solvent microemulsion, which is simple and convenient to construct, green and environmentally friendly, safe and low-cost.

[0053] 3. The present invention is conducive to the miniaturization of fracturing units. The body of the nitrogen-generating and pressurizing vehicle group can be an off-road vehicle with four front and eight rear parts. It is not only a nitrogen-generating vehicle, but also a fracturing vehicle with nitrogen as the medium. It can be designed to include one or more multifunctional miniature high-pressure fracturing vehicles, which can perform fracturing with nitrogen as the medium, and can also perform fracturing with nitrogen and liquid as the medium at the same time. Among them, the microemulsion preparation mechanism and the laser microemulsion sprayer can be installed on a four-wheel drive off-road miniature vehicle; the waterless fracturing vehicle of the present invention can replace multiple or even dozens of existing fracturing vehicles, which is low-carbon, green and environmentally friendly, does not cause earthquakes, has a simple structure, is easy to operate, and is efficient, high-purity, automated, and low-cost in preparing high-pressure nitrogen and solvent picometer, femtometer, and atm-level particles, and can perform waterless fracturing in ultra-deep wells with large displacement, high pressure, and high power.

[0054] 4. The present invention uses high-pressure nitrogen to carry the microemulsion picometer-level particles of the solvent to achieve full coverage of the entire oil and gas reservoir. The biggest problem with existing fracturing technology is that the affected area is too small. The existing fracturing technology can only create a few long cracks and can only affect the rock pores around the long cracks; using water as a medium can affect a cylindrical volume of 20 meters away from the well at most, and water only flows to the high permeability part; from the injection well to the production well, it first flows only to the nearest production well, and is mostly concentrated on the straight line from the injection well to the production well, and other parts are not affected. The high-pressure nitrogen used in the present invention has many advantages: good sealing, good purge, good protection, good thermal expansion and contraction, good catalytic performance (promoting the deformation and shrinkage of the microemulsion particles of the solvent, promoting the nanoparticles to become picometer-level particles, and changing the performance of underground oil and rocks), good catalytic performance, strong pressure increase in the formation, and enhanced fluidity of oil and gas. High-pressure nitrogen is an inert gas, will not react chemically with the fluid in the oil and gas reservoir, has a wide source and is easy to produce, reduces the viscosity of crude oil, and prevents sandification and collapse of the reservoir rock formation. The most important thing is that the high-pressure nitrogen gas directly irradiated by the laser can promote the transformation of the solvent nanoparticles into picometer particles. Since the purging property of the high-pressure nitrogen gas causes strong diversion, the high-pressure nitrogen gas directly irradiated by the laser strongly promotes the solvent picometer particles to turn from high-permeability pores to nanopores, picometer pores, femtopores and atometre pores. The strong penetrating power of the laser leads the solvent picometer particles into farther formations. It can be seen that whether it is from the production well swallowing or the injection well swallowing (injection), whether it is a homogeneous reservoir or a heterogeneous reservoir, the solvent picometer particles will be uniformly pushed from the injection point to the surroundings, almost 100% of the entire reservoir, so that the solvent microemulsion picometer particles fully spread throughout the oil and gas reservoir, making the volume sweep coefficient greater than 95%.

[0055] 5. The ultra-strong penetrating laser emitted by the laser transmitter of the present invention includes semiconductor solid laser, krypton laser, red laser, infrared, etc. The power of the semiconductor solid laser emitted by the laser transmitter is 40W, the wavelength is 450nm, and it has the characteristics of high pressure resistance, high efficiency, long life, high beam quality, good stability, compact and miniaturized structure. The wavelength of the krypton laser emitted by the laser transmitter is 6471 angstroms, which has the advantage of extremely strong penetration rate, can penetrate fog up to 300 meters, and has a range of about 135 kilometers. The wavelength of the red laser emitted by the laser transmitter is 620 to 750 nanometers, the frequency is 480 to 405 MHz, and the duration of the pulse is ≤1ms. It has the advantages of long laser wavelength, small energy, weak cutting force, and high penetration. The ultra-strong penetrating laser pulse time is more than 100,000 hours; high conversion efficiency: photoelectric conversion efficiency ≥25%; stable: good beam quality, with very good monochromaticity, directionality and stability; it has the three elements of "excitation source", "gain medium" and "resonance structure". Driven by high-pressure nitrogen, ultra-penetrating laser pulses can strongly promote the solvent to become picometer, femtometer, and attometer particles. After 8 to 10 years of production, the volume sweep coefficient of the overall exploited reservoir can reach 90% to 100%, almost eliminating dead oil and dead gas zones.

[0056] 6. The present invention can achieve a rapid recovery rate of 85% to 100% for the entire oil and gas field in 8 to 10 years. Under the combined action of laser with strong penetrating power and high-pressure nitrogen, about 50% of the nano solvent is pumped and pulsed into nano-scale microemulsion, which is pulsed into picometer-level particles by the first-level laser microemulsion sprayer, femtometer-level particles by the second-level laser microemulsion sprayer, and atm-level particles by the third-level laser microemulsion sprayer. It is easier to enter the picometer-level gap of oil, dissolve oil, make heavy oil (heavy oil, extra-heavy oil), various residual oils, shale oil, oil shale oil, and oil sand oil completely non-adhesive to rocks, and reduce the viscosity of heavy oil by 99.9%; make the permeability of reservoir rocks of shale oil, oil shale oil, oil sand oil, dense oil and gas, coal rock, shale, combustible ice rock, and deep hot dry rock greater than 100 millidarcy. The volume sweep coefficient of the entire reservoir is greater than 95%; after 8 to 10 years of production, the recovery rate of the entire reservoir of heavy oil (heavy oil, extra-heavy oil), various residual oils, shale oil, oil shale oil, oil sand oil, tight oil and gas, coal rock, shale, and combustible ice can reach 85% to 100%. In particular, it can exploit deep underground geothermal energy, and exploit deep dry hot rock geothermal water for heating or power generation for generations, which can enable China to fully control underground energy extraction. China imports 500 million tons of oil every year, and about 70% of its oil is imported; China needs 20 million cubic meters of natural gas every year, and China imports 3.3 million cubic meters of natural gas every year; by implementing this mining method, China can quickly achieve self-sufficiency in oil, natural gas, and power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0058] Figure 1 A schematic diagram of the microemulsion preparation mechanism and the laser microemulsion sprayer structure of the waterless fracturing vehicle of the present invention;

[0059] Figure 2 A schematic diagram of the frame structure of the nitrogen-generating and pressurizing vehicle of the waterless fracturing vehicle of the present invention;

[0060] Figure 3 A schematic diagram of the structure of the laser microemulsion sprayer group of the waterless fracturing vehicle of the present invention;

[0061] Figure 4 The overall structural layout diagram of the waterless fracturing vehicle of the present invention;

[0062] In the figure: 1. nitrogen-making booster vehicle group; 11. nitrogen-making booster vehicle; 111. air compressor; 112. cold dryer; 113. nitrogen-making machine; 114. nitrogen booster; 115. gas storage tank; 116. vehicle body 1; 12. power supply 1; 2. microemulsion preparation mechanism; 21. first microemulsion booster pump; 22. second microemulsion booster pump; 23. liquid storage tank; 24. power supply 2; 3. laser microemulsion sprayer; 31. laser transmitter; 32. mixing container; 321. first mixing chamber; 322. second mixing chamber; 323, first inlet; 324, second inlet; 325, laser inlet; 326, fracturing medium outlet; 327, injection channel; 33, first nozzle; 34, second nozzle; 35, one-way valve; 3a, first-stage laser microemulsion sprayer; 31a, first laser emitter; 32a, first mixing container; 321a, first mixing chamber A; 322a, second mixing chamber A; 323a, first inlet A; 324a, second inlet A; 325a, laser inlet A; 326a, Fracturing medium outlet A; 327a, injection channel A; 33a, first nozzle A; 34a, second nozzle A; 35a, one-way valve A; 3b, second-stage laser microemulsion sprayer; 31b, second laser emitter; 32b, second mixing container; 321b, first mixing chamber B; 322b, second mixing chamber B; 323b, first inlet B; 324b, second inlet B; 325b, laser inlet B; 326b, fracturing medium outlet B; 327b, injection channel B; 34b, second nozzle Head B; 35b, one-way valve B; 3c, third-stage laser microemulsion sprayer; 31c, third laser emitter; 32c, third mixing container; 321c, first mixing chamber C; 322c, second mixing chamber C; 323c, first inlet C; 324c, second inlet C; 325c, laser inlet C; 326c, fracturing medium outlet C; 327c, injection channel; 34c, second nozzle C; 35c, one-way valve C; 4, Christmas tree four-way valve side interface; 5, well to be fracturing; 6, vehicle body 2. DETAILED DESCRIPTION

[0063] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0064] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] With the gradual decrease of oil and gas reserves and the increasing complexity of exploitation, the method of fracturing has emerged. Fracturing methods are divided into two categories: hydraulic fracturing and high-energy gas fracturing. However, both hydraulic fracturing and high-energy gas fracturing have many shortcomings, especially in the current situation where oil and gas reserves are further reduced and the difficulty of remaining oil and gas exploitation is further increased. The existing hydraulic fracturing and high-energy gas fracturing have gradually failed to meet the exploitation needs.

[0068] According to the classification of fracturing fluid, hydraulic fracturing is divided into water-based fracturing, oil-based fracturing, emulsion fracturing, foam fracturing, clean micelle fracturing, active water fracturing, etc. In the existing fracturing technology, the viscosity of the fracturing fluid suddenly decreases during the sand addition process, resulting in poor sand carrying capacity and sand plugging; in soft formations with high mud content, sand is easy to sink into the mud layer, and the sand support function fails; in brittle coal seams, sand is also easy to sink into the coal seam and fail; mudstone formations swell when exposed to water and block pore throats. Large-scale fracturing must be used to add sand to shale formations, with as many as dozens or even hundreds of fracturing trucks, which poses a hidden danger to earthquakes. Excessive water consumption for fracturing will cause water shortage in the environment, and the water transportation fee is extremely high. Acidification of harmful formations, and the effective action distance is extremely short. In polymer injection oil recovery technology, polymers are easy to block small and medium pore throats, making it impossible to recover the oil in the small and medium pore throats. Various types of heavy oil (heavy oil, extra heavy oil), various residual oils, shale oil, oil shale oil, and oil sands oil are even more difficult to exploit in the world.

[0069] Existing fracturing trucks can only perform liquid medium or concomitant gas injection but cannot perform waterless fracturing.

[0070] High-energy gas fracturing is a fracturing method that uses a large amount of high-temperature and high-pressure gas produced by the rapid combustion of gunpowder or rocket propellant in the wellbore. It is difficult to ensure safety. The injection medium includes a variety of media, with carbon dioxide and nitrogen being the most suitable. The molecular diameter of carbon dioxide is 0.33nm, and the molecular diameter of nitrogen is 0.364nm. Both molecular diameters are smaller than water (the molecular diameter of water is 0.4nm), and they can more easily enter the molecular gaps of heavy oil and thin oil, dissolve oil and increase oil recovery, and more easily enter the nanopores of rocks to replace the adsorbed oil and gas, methane, and free oil and gas in the nanopores.

[0071] Carbon dioxide fracturing is also beneficial in reducing greenhouse gas emissions; it can also store carbon dioxide underground and convert it into renewable energy through the Bioenergy Carbon Capture and Storage (BECCS) project, promoting the use of bioenergy, the development of related industries, and the development of green economic industries. However, the disadvantage of carbon dioxide fracturing is that it has many safety risks.

[0072] The nitrogen used in nitrogen fracturing has the advantages of being cheap, good quality and having a wide source. 78% of the air is nitrogen, and the air is compressed and then produced by a nitrogen generator, which is convenient and affordable. Injecting nitrogen increases the pressure inside the oil well, increases the formation energy, promotes the flow of oil and gas, and promotes the self-flowing of the oil well. At the same time, it reduces the moisture inside the oil well, reduces the resistance of the wellhead, avoids the mixing of oil and water, and avoids wellhead blockage. Waterless fracturing construction is more convenient and simple.

[0073] Therefore, based on the nitrogen fracturing technology, the present invention proposes a waterless fracturing vehicle and a high-recovery rapid production method for oil, gas and water based on the waterless fracturing vehicle, which utilizes the trace oxygen in the high-pressure nitrogen to oxidize and generate heat, increase the temperature by 15°C, and increase the solubility of the picometer-level solvent particles; it only needs to inject high-pressure nitrogen for several days (for example, 3-10 days) to inject more than 150,000 Nm 3 High-pressure nitrogen; all production wells and injection wells are fractured by waterless fracturing vehicles and the high-recovery rapid production method of oil, gas and water based on waterless fracturing vehicles can form a nano-network volume fracture system in the entire oil and gas reservoir; the entire oil and gas reservoir will be fully affected, almost eliminating dead oil and dead gas areas; the oil in the entire oil reservoir does not stick to rocks, and the viscosity is reduced by 99%; the permeability of the entire oil and gas reservoir reaches more than 100 millidarcy; the recovery rate of the entire oil and gas reservoir can reach 85% to 100%. The waterless fracturing vehicle and the high-recovery rapid production method of oil, gas and water based on the waterless fracturing vehicle provided in this embodiment are described in detail below.

[0074] like Figures 1 to 4 As shown, the waterless fracturing vehicle includes:

[0075] Nitrogen production and pressurization vehicle group 1, used for preparing nitrogen and injecting the nitrogen into the production well for waterless fracturing;

[0076] The microemulsion preparation mechanism 2 is used to prepare the nano-solvent into a nano-scale microemulsion and output it under pressure;

[0077] The laser microemulsion sprayer 3 comprises a laser emitter 31 and a mixing container 32; the mixing container 32 is provided with a first mixing chamber 321 and a second mixing chamber 322; the outlet end of the nitrogen-making and pressurizing vehicle group 1 is connected to the first mixing chamber 321 so as to inject nitrogen into the first mixing chamber 321; the outlet end of the microemulsion preparation mechanism 2 is connected to the first mixing chamber 321 so as to inject nano-scale microemulsion into the first mixing chamber 321 and perform gas-liquid collision mixing with the input nitrogen; the laser emitter 31 is optically connected to the first mixing chamber 321 so as to emit laser into the first mixing chamber 321 and ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; the first mixing chamber 321 is connected to the second mixing chamber 322 through the injection channel so as to inject picometer-scale microemulsion and nitrogen into the second mixing chamber 322 and perform spray collision mixing to form a picometer-scale microemulsion nitrogen mixture;

[0078] The second mixing chamber 322 has a fracturing medium outlet 326 that can be connected to the production well and inject pressurized nitrogen mixed with picometer-scale microemulsion into the production well for waterless fracturing.

[0079] The waterless fracturing vehicle of this embodiment adopts high-pressure nitrogen gas with nano-solvent injection to perform nitrogen waterless fracturing; wherein, the nitrogen-making and pressurizing vehicle group 1 is used to prepare nitrogen gas and pressurize the nitrogen gas to a certain high-pressure state and inject it into the first mixing chamber 321; the microemulsion preparation mechanism 2 is used to prepare the nano-solvent into a nano-scale microemulsion in a microemulsion state and pressurize it and inject it into the first mixing chamber 321; the first mixing chamber 321 of the laser microemulsion sprayer 3 is used as a collision mixing chamber for the high-pressure jet nitrogen gas and the high-pressure jet nano-scale microemulsion. The first mixing chamber 321 also serves as a laser ablation chamber. The laser emitter 31 emits laser into the first mixing chamber 321 to evaporate or break the nanoparticles in the nano-scale microemulsion into picometer-scale particles to form a picometer-scale microemulsion. The picometer-scale microemulsion is sprayed into the second mixing chamber 322 together with nitrogen for further collision and mixing to form a picometer-scale microemulsion nitrogen mixture. The picometer-scale microemulsion nitrogen mixture can be injected into the production well from the fracturing medium outlet 326 of the second mixing chamber 322 for waterless fracturing. The method for converting the nanoparticles in the nano-scale microemulsion of the present invention into picometer particles includes physical methods (high-energy collision, laser ablation) and biological methods (biomineralization); the high-energy collision includes the spraying collision when the microemulsion preparation mechanism 2 pressurizes and sprays the nano-scale microemulsion into the first mixing chamber 321, the high-pressure nitrogen collision, and the liquid atomization and spraying collision during the injection into the second mixing chamber 322; the laser ablation is to irradiate the nanoparticles of the microemulsion with a laser beam with strong penetrating power, and the nanoparticles are evaporated or broken into picometer particles through the interaction between the laser and the nanoparticles of the microemulsion; the biomineralization is because the nano-solvent itself is a bio-based material, and the bio-based material is used as a catalyst to remove the heavy metal ions in the petroleum molecules, so that the particles of the petroleum molecules are converted into picometer particles, which do not adhere to the rock at all, and the oil viscosity is lower, and the heavy metal ions in the reservoir pores are separated, so that the reservoir nanopores are more unobstructed. The picometer-scale microemulsion prepared by the waterless fracturing truck is both an oil-soluble and water-soluble dispersion system, and also has a high interfacial area, stable thermodynamic properties and strong solubility; the picometer-scale microemulsion is aimed at the problems of almost empty oil wells, more water and less oil, and oil floating on the upper layer. The picometer-scale microemulsion is more oil-soluble than water-soluble, has higher penetration, and can penetrate oil, dense rocks, coal and shale. It can also greatly enhance solubility, and it is easier to dissolve rocks and increase permeability when it is close to the rock wall. The oil is more It is easy to dissolve petroleum and improve the sweep coefficient. The picometer-scale microemulsion can be combined with high-pressure nitrogen filling to achieve picometer-scale waterless fracturing. The present invention uses a waterless fracturing vehicle to pressurize and inject the picometer-scale microemulsion nitrogen mixture into the production well. Under the strong displacement of the high-pressure nitrogen, the picometer-scale particles of the microemulsion eventually form a connected picometer volume network fracture system in the oil and gas field reservoir at a larger well spacing, thereby sweeping the entire oil and gas field reservoir, thereby being able to improve the recovery rate of the entire oil and gas field reservoir.

[0080] Specifically, the nitrogen-making booster vehicle group 1 includes 1-3 nitrogen-making booster vehicles 11; the nitrogen-making booster vehicles 11 are equipped with a power supply 12, and the power supply 12 is used to supply power to the nitrogen-making booster vehicle group 1.

[0081] Specifically, the nitrogen-making booster vehicle 11 includes an air compressor 111, a cold dryer 112, a nitrogen generator 113, a nitrogen booster 114 connected to the nitrogen generator 113, and a gas storage tank 115. The nitrogen booster 114 pressurizes and stores the nitrogen produced by the nitrogen generator 113. Specifically, the air compressor 111 is used to compress the air; the cold dryer 112 is used to condense and dry the air compressed by the air compressor 111; the nitrogen generator 113 uses the air condensed and dried by the cold dryer 112 as a nitrogen-making raw material to produce nitrogen, and the nitrogen booster 114 compresses the nitrogen produced by the nitrogen generator 113 and stores the compressed nitrogen in the gas storage tank 115. In the nitrogen-making booster vehicle 11 provided in this embodiment, the nitrogen flow rate of the gas storage tank 115 during the process of outputting nitrogen is greater than 1200Nm 3 / min; the gas storage tank 1115 outputs nitrogen so that the nitrogen output pressure of the fracturing medium outlet 326 is 35MPa to 150MPa.

[0082] Specifically, the vehicle body 116 of the nitrogen-generating and boosting vehicle 11 is an off-road vehicle with four front wheels and eight rear wheels, and the air compressor 111, the cold dryer 112, the nitrogen generator 113, the nitrogen booster 114, the gas storage tank 115 and the power supply 12 are all installed on the vehicle body 116.

[0083] The waterless fracturing vehicle provided in this embodiment can be used as a multifunctional micro high-pressure fracturing vehicle, which can perform fracturing with nitrogen as the medium, can perform fracturing with liquid as the medium, and can also perform fracturing with nitrogen and liquid as the medium at the same time. The waterless fracturing vehicle can be designed to include one or more nitrogen-making and pressurizing vehicles 11, which can replace dozens or even dozens of existing fracturing vehicles, and has the advantages of low-carbon, green and environmental protection, no earthquake, simple structure, convenient operation, high efficiency, high purity, automation, and low cost in preparing nitrogen, and can perform large displacement, high pressure, and high power nitrogen fracturing in ultra-deep wells.

[0084] In some embodiments, the laser microemulsion sprayer 3 further includes a first spray head 33 and a second spray head 34;

[0085] The mixing container 32 has a first inlet 323, a second inlet 324 and a laser inlet 325 connected to the first mixing chamber 321, and a fracturing medium outlet 326 connected to the second mixing chamber 322; an injection channel 327 is provided between the first mixing chamber 321 and the second mixing chamber 322;

[0086] The first nozzle 33 is installed in the first inlet 323, and the outlet end of the microemulsion preparation mechanism 2 is connected to and communicates with the first nozzle 33, so as to spray the nano-scale microemulsion into the first mixing chamber 321 through the first nozzle 33;

[0087] The outlet end of the nitrogen-generating and pressurizing vehicle group 1 is connected to and communicates with the second inlet 324 to inject nitrogen into the first mixing chamber 321;

[0088] The laser emitting end of the laser emitter 31 is connected to the laser inlet 325 to emit laser light into the first mixing chamber 321 to ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles;

[0089] The second nozzle 34 is installed at the channel opening of the injection channel 327 corresponding to the second mixing chamber 322 to inject the picometer microemulsion and nitrogen into the second mixing chamber 322 for spraying, collision and mixing to form a picometer microemulsion nitrogen mixture.

[0090] In some embodiments, the microemulsion preparation mechanism 2 includes a first microemulsion booster pump 21, a second microemulsion booster pump 22, and a liquid storage tank 23 for filling the nano-solvent;

[0091] The first microemulsion booster pump 21 is cyclically connected to the liquid storage tank 23 to cyclically pump out the nano-solvent in the liquid storage tank 23, and the nano-solvent gradually forms a nano-scale microemulsion under the action of stirring and collision;

[0092] The inlet end of the second microemulsion booster pump 22 is connected to the liquid storage tank 23, and the outlet end of the second microemulsion booster pump 22 is connected to and communicates with the first nozzle 33, so as to pressurize and spray the nano-scale microemulsion in the liquid storage tank 23 into the first mixing chamber 321 through the first nozzle 33 for collision mixing.

[0093] The first microemulsion booster pump 21 is used to suck the nano-solvent liquid in the liquid storage tank 23 into the pump head, and after the high-speed stirring pulse of the pump head blades, a nano-scale microemulsion is formed inside the pump head, and the nano-scale microemulsion is subjected to high-energy collision in the liquid storage tank 23 by pressurization and pumping, thereby obtaining a more uniform nano-scale microemulsion, and at the same time, a part of the nano-scale particles of the microemulsion can be broken into picometer-scale particles. The second microemulsion booster pump 22 is used to pressurize the uniform nano-scale microemulsion and spray it into the first mixing chamber 321 at high speed, so as to collide with the chamber wall and the high-speed jet nitrogen again, further break the nano-scale particles and mix them evenly.

[0094] Specifically, the mixing container 32 includes a valve body and a fluid pipe; the valve body has a first mixing chamber 321 for mixing gas, liquid and laser inside, a laser inlet 325 and an injection channel 327 connected to the first mixing chamber 321 are provided at both ends of the valve body, and a first inlet 323 and a second inlet 324 connected to the first mixing chamber 321 are provided on the outer peripheral side of the valve body to form a four-way valve structure; wherein the first inlet 323 and the second inlet 324 are arranged oppositely; and the laser inlet 325 and the injection channel 327 are arranged oppositely. One end of the fluid pipe is sealed and connected to one end of the valve body corresponding to the injection channel 327, and a second mixing chamber 322 is formed inside the fluid pipe, and the other end of the fluid pipe forms a second mixing chamber 322 connected to the fracturing medium outlet 326 of the well to be fractured. The laser emitter 31 is installed on the valve body and sealed and connected to the laser inlet 325, and its laser emission direction is directly opposite to the laser inlet 325, so that the emitted laser can pass through the laser inlet 325 into the first mixing chamber 321. The first nozzle 33 is installed in a sealed manner through the first inlet 323, and its nozzle extends into the first mixing chamber 321. The outlet end of the nitrogen-making and pressurizing vehicle group 1 is sealed and connected to the second inlet 324 through a one-way valve 35. The second nozzle 34 is installed in a sealed manner in the injection channel 327, and its nozzle extends into the second mixing chamber 322.

[0095] Specifically, a union joint is installed at the other end of the fluid pipe, which is used to connect to the bypass interface 4 of the Christmas tree four-way valve through a pipeline, so as to inject fracturing medium into the well to be fractured through the bypass interface 4 of the Christmas tree four-way valve.

[0096] Specifically, nano-solvents include petroleum nano-solvents and rock nano-solvents; among them, rock nano-solvents include coal-rock nano-solvents, shale nano-solvents and combustible ice super-cooled nano-solvents; petroleum nano-solvents are selected for oil field exploitation; petroleum nano-solvents and rock nano-solvents are selected for tight oil field exploitation; rock nano-solvents are selected for tight gas field exploitation; coal-rock nano-solvents are selected for coalbed methane exploitation; shale nano-solvents are selected for shale gas exploitation; and combustible ice super-cooled nano-solvents are selected for methane gas exploitation.

[0097] Specifically, the nano-solvent is transformed into a microemulsion state mainly due to collision pulses and laser ablation. The collision pulses include the stirring collision pulses generated by the nano-solvent and the pump head blades of the first micro-emulsion booster pump 21 during the stirring process, the pumping collision pulses in the liquid storage tank 122 during the pumping process of the first micro-emulsion booster pump 21, and the collision pulses of the second micro-emulsion booster pump 22. Of course, the collision pulses also include the collision pulses entering the laser micro-emulsion sprayer 3 or the laser micro-emulsion sprayer group, which will be described in detail later. The laser ablation effect and process will also be described in detail when the laser micro-emulsion sprayer group is introduced later.

[0098] Specifically, the nano-solvent is bio-based, soluble in water, and the nano-solvent aqueous solution becomes a nano-scale microemulsion after pulse injection treatment, and the concentration of the nano-solvent aqueous solution is 50%. Nano-solvents include petroleum nano-solvents and rock nano-solvents. The main function of petroleum nano-solvents is to completely prevent oil from adhering to rocks and reduce oil viscosity, especially reducing the viscosity of heavy oil by 99.9%. Rock nano-solvents include dense sandstone nano-solvents, dense carbonate rock nano-solvents, coal rock nano-solvents, shale nano-solvents, and combustible ice supercooled nano-solvents. Different rock nano-solvents are targeted at different mining reservoir rocks. For details, please refer to the subsequent description of the high recovery rate of oil and gas based on waterless fracturing vehicles.

[0099] Based on the principle of the waterless fracturing vehicle 1, the inventor has experimentally confirmed that in the laboratory, using 1% petroleum nano solvent, under normal temperature conditions, it takes 10 days to dissolve heavy oil, and the heavy oil does not adhere to the rock at all, and the viscosity reduction rate is greater than 99%. After the 1% petroleum nano solvent is treated with high-pressure nitrogen pulse, spray spray and laser strong penetration, it is converted into a picometer-level petroleum solvent particle flushing, and the heavy oil is dissolved in 10 hours. The heavy oil does not adhere to the rock at all, and the viscosity reduction rate is greater than 99%. It can be seen that reducing the size of the petroleum nano solvent is conducive to improving the solubility of heavy oil.

[0100] In addition, the inventors also conducted an experiment in oil well 3. The selected experimental oil well was an oil well that had been mined for 40 years, with a recovery rate of about 40%. After injecting 1% of the oil nano solvent into the oil well and shutting it down for 10 days, the oil recovery rate, including heavy oil, increased to more than 70%. When the 1% oil nano solvent was transformed into picometer-level oil solvent particles after being treated with high-pressure nitrogen pulses, spray spraying, and picometer lasers and then injected into the oil well, the oil recovery rate, including heavy oil, could reach more than 80%. Picometer-scale petroleum solvent particles are injected into the oil well to flush the formation, and the well is shut down for ten days to increase the dissolution time. Due to the nitrogen production technology, the nitrogen used contains trace oxygen, which can generate heat and increase the temperature by about 15°C. The appropriate amount of temperature increase can further reduce the adhesion between oil and rock, making the viscosity reduction rate greater than 99%. In addition, the high-pressure nitrogen expands violently in the formation and affects a long distance, so that the recovery rate of heavy oil, thin oil, residual oil, shale oil, oil shale oil, and oil sand oil can reach 85% to 100%.

[0101] In some embodiments, the microemulsion preparation mechanism 2 and the laser microemulsion sprayer 3 are both installed on the same vehicle body 2 6 ; the vehicle body 2 6 can be a small pickup truck or a four-wheel drive off-road mini vehicle; the vehicle body 2 6 is configured with a first microemulsion booster pump 21 and a second microemulsion booster pump 22 for the microemulsion preparation mechanism 2 , and a power supply 24 for powering the laser emitter 31 of the laser microemulsion sprayer 3 .

[0102] Specifically, the power supply 24 can be a generator or a storage battery, which can be selected according to the specific application scenario.

[0103] Specifically, the second microemulsion booster pump 22 injects the pressurized high-pressure microemulsion including nano-solvent particles into the first mixing chamber 321 through the first nozzle 33. The microemulsion can reach a high pressure of 35MPa to 150MPa in the first nozzle 33, ensuring that the microemulsion can form a uniform atomization spray effect when entering the first mixing chamber 321.

[0104] Specifically, the second inlet 324 is used for the high-pressure nitrogen from the gas storage tank 115 to enter the first mixing chamber 321 through the one-way valve 35. The nitrogen transported in the second inlet 324 can reach a high pressure of 35MPa to 150MPa. The second inlet 324 is equal to the input pressure of the first nozzle 33, and is controlled by the one-way valve 35 to ensure that the nano-scale microemulsion and the high-pressure nitrogen are fully mixed. The nano-scale microemulsion in the first mixing chamber 321 collides and mixes with the high-pressure nitrogen, and after laser irradiation, the second nozzle 34 pulse sprays to generate a picometer-level microemulsion nitrogen mixture, which flows out through the fracturing medium outlet 326 of the second mixing chamber 322.

[0105] Specifically, the fracturing medium outlet 326 is connected to the well to be fractured to inject a high-pressure picometer-level microemulsion nitrogen mixture into the well to be fractured. In some optional embodiments, the fracturing medium outlet 326 is connected to the well to be fractured by using the Christmas tree four-way valve side port 4.

[0106] Specifically, a perspective window is provided on the valve body of the mixing container 32 corresponding to the laser inlet 325 , and the perspective window is convenient for observing whether the laser is normally injected into the mixing container 32 .

[0107] In some embodiments, there are multiple laser microemulsion sprayers 3, and the multiple laser microemulsion sprayers 3 are connected in sequence and connected to form a laser microemulsion sprayer group with a multi-stage series structure. The laser microemulsion sprayer group is connected and connected to the outlet end of the microemulsion preparation mechanism 2 and the nitrogen-making and boosting vehicle group 1, so that the size of the nanoparticles in the nano-scale microemulsion is gradually refined and reduced through the laser ablation action of multiple laser microemulsion sprayers 3.

[0108] Multiple laser microemulsion sprayers 3 are connected in series in sequence, so that the size of nanoparticles in the nano-scale microemulsion can be gradually refined and reduced through the laser ablation effect and high-speed and high-energy collision effect of multiple laser microemulsion sprayers 3, producing picometer-level microemulsion nitrogen mixture, femtometer-level microemulsion nitrogen mixture and atometer-level microemulsion nitrogen mixture, further improving the sweep coefficient of waterless fracturing, and under the strong displacement of high-pressure nitrogen, forming a connected picometer, femtometer and atometer volume network fracture system in a larger well spacing range, thereby achieving the purpose of improving the recovery rate of the entire oil and gas field reservoir.

[0109] In some embodiments, the laser microemulsion sprayer group includes a first-stage laser microemulsion sprayer 3a and a second-stage laser microemulsion sprayer 3b; the first-stage laser microemulsion sprayer 3a and the second-stage laser microemulsion sprayer 3b are both identical in structure to the laser microemulsion sprayer 3;

[0110] The first-stage laser microemulsion sprayer 3a includes a first laser emitter 31a, a first mixing container 32a, a first nozzle A33a, a second nozzle A34a and a one-way valve A35a; the first mixing container 32a is provided with a first mixing chamber A321a and a second mixing chamber A322a; the first mixing container 32a has a first inlet A323a, a second inlet A324a, a laser inlet A325a, a fracturing medium outlet A326a, and an injection channel A327a;

[0111] The outlet end of the nitrogen-generating and pressurizing vehicle group 1 is connected to the first mixing chamber A321a through a one-way valve A35a to inject nitrogen into the first mixing chamber A321a; the outlet end of the microemulsion preparation mechanism 2 is connected to the first mixing chamber A321a through a first nozzle A33a to inject nano-scale microemulsion into the first mixing chamber A321a and perform gas-liquid collision mixing with the input nitrogen; the first laser emitter 31a is optically connected to the first mixing chamber A321a through a laser inlet A325a to emit laser into the first mixing chamber A321a and ablate nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; the first mixing chamber A is connected to the second mixing chamber A322a through an injection channel A327a to inject picometer-scale microemulsion and nitrogen into the second mixing chamber A322a and perform spray collision mixing to form a picometer-scale microemulsion nitrogen mixture;

[0112] The second-stage laser microemulsion sprayer 3b includes a second laser emitter 31b, a second mixing container 32b, a first nozzle B (not shown in the figure, when multiple stages are connected in series, the plug is removed and replaced to block the first inlet B323b), a second nozzle B34b and a one-way valve B35b; the second mixing container 32b is provided with a first mixing chamber B321b and a second mixing chamber B322b; the second mixing container 32b has a first inlet B323b, a second inlet B324b, a laser inlet B325b, a fracturing medium outlet B326b and an injection channel B327b;

[0113] The fracturing medium outlet A326a of the second mixing chamber A322a is connected to the second inlet B324b through a pipeline to communicate with the first mixing chamber B321b, so as to spray in a picometer-scale microemulsion nitrogen mixture; the second laser emitter 31b is optically connected to the first mixing chamber B321b through the laser inlet B325b, so as to emit a laser into the first mixing chamber B321b and ablate the picometer-scale particles in the picometer-scale microemulsion nitrogen mixture to generate femtometer-scale particles, thereby forming a femtometer-scale microemulsion nitrogen mixture; the first mixing chamber B321b is connected to the second mixing chamber B322b through the second nozzle B34b installed in the injection channel B327b, so as to spray in a femtometer-scale microemulsion nitrogen mixture into the second mixing chamber B322b; the second mixing chamber B322b has a fracturing medium outlet B326b that can be connected to a production well and inject pressurized nitrogen mixed with atomi-scale microemulsion into the production well for waterless fracturing.

[0114] The nitrogen-generating and pressurizing vehicle group 1 is used to inject high-pressure nitrogen into the first mixing chamber A321a, which serves as a high-pressure nitrogen supply unit and is used to provide fracturing pressure. The nano-scale microemulsion can be processed into a picometer-scale microemulsion through the first-stage laser microemulsion sprayer 3a, and the output of the picometer-scale microemulsion nitrogen mixture can be realized; the picometer-scale microemulsion can be processed into a femtometer-scale microemulsion through the second-stage laser microemulsion sprayer 3b, and the output of the femtometer-scale microemulsion nitrogen mixture can be realized; by connecting and arranging the two-stage laser microemulsion sprayer, the particle size of the solvent in the microemulsion is further refined, the penetration is enhanced, and the scope of the fracture system is increased, thereby achieving a high recovery rate.

[0115] In some embodiments, the laser microemulsion sprayer group further includes a third-stage laser microemulsion sprayer 3c; the third-stage laser microemulsion sprayer 3c has the same structure as the laser microemulsion sprayer 3;

[0116] The third-stage laser microemulsion sprayer 3c includes a third laser emitter 31c, a third mixing container 32c, a first nozzle C (not shown in the figure, when multiple stages are connected in series, the plug is removed and replaced to block the first inlet C323c, a second nozzle C34c and a one-way valve C35c; the third mixing container 32c is provided with a first mixing chamber C321c and a second mixing chamber C322c; the third mixing container 32c has a first inlet C323c, a second inlet C324c, a laser inlet C325c, a fracturing medium outlet C326c and an injection channel 327c;

[0117] The fracturing medium outlet B326b of the second mixing chamber B322b is connected to the second inlet C324c through a pipeline to communicate with the first mixing chamber C321c, so as to spray in a femtometer-scale microemulsion nitrogen mixture; the third laser emitter 31c is optically connected to the first mixing chamber C321c through the laser inlet C325c, so as to emit a laser into the first mixing chamber C321c and ablate the femtometer-scale particles in the femtometer-scale microemulsion nitrogen mixture to generate ammeter-scale particles, thereby forming an ammeter-scale microemulsion nitrogen mixture; the first mixing chamber C321c is connected to the second mixing chamber C322c through the second nozzle C34c installed in the injection channel C327c, so as to spray the ammeter-scale microemulsion nitrogen mixture into the second mixing chamber C322c; the second mixing chamber C322c has a fracturing medium outlet C326c that can be connected to a production well and inject pressurized nitrogen mixed with ammeter-scale microemulsion into the production well for waterless fracturing.

[0118] The output of the microemulsion nitrogen mixture at the 3rd laser microemulsion sprayer 3c can be realized, further increasing the scope of the fracture system and thus improving the recovery rate. By connecting and arranging the three-stage laser microemulsion sprayer, the particle size of the solvent can be gradually ablated, fragmented and mixed, and the particle size consistency in the microemulsion is also improved. While improving the penetration, the fracture system can be more evenly extended from the injection point to the surrounding areas.

[0119] The number of stages of the laser microemulsion sprayer group may also exceed three, and the number of laser microemulsion sprayers 3 arranged may be selected according to specific circumstances to form more stages by connecting them in series in sequence.

[0120] In some embodiments, the first laser emitter 31a, the second laser emitter 31b and the third laser emitter 31c are all any one of a semiconductor solid laser with an emission wavelength of 450nm and a power of 40W, a krypton laser with an emission wavelength of 6471 angstroms, a red laser with a wavelength of 620-750nm and a pulse duration ≤1ms, and an infrared laser.

[0121] The semiconductor solid-state laser has a power of 40W and a wavelength of 450nm. It has the characteristics of high voltage resistance, high efficiency, long life, high beam quality, good stability, compact and miniaturized structure; the krypton laser can emit a red laser with a wavelength of 6471 angstroms, which has extremely strong penetration and can penetrate fog for 300 meters and has a range of 136 kilometers; the red laser emits a red laser with a wavelength of 620-750nm, a frequency of 480-405MHz, and a pulse duration of ≤1ms. It has the characteristics of long wavelength, low energy, weak cutting force, and high penetration.

[0122] Specifically, the picometer-level particles in the microemulsion can be tested by the X-ray experiment instrument and the Compton scattering spectrometer to test the Compton wavelength, and the particle size is calculated to be in the picometer level. The picometer-level microemulsion particles not only greatly improve the solubility of dissolved oil and dissolved rock, but also further greatly improve the volume sweep coefficient; high-pressure nitrogen assisted enhanced laser can not only have higher penetration, can penetrate oil and dense rock, coal rock, shale, but also make the microemulsion picometer-level particles have greatly enhanced solubility, and have super solubility for dissolved oil and dissolved rock, and stronger super sweep coefficient, which can form a connected picometer volume network fracture system around the entire oil and gas reservoir; the picometer-level solvent particles can make the oil in the entire oil and gas field completely non-sticky to the rock, reduce the viscosity by 99%, and the recovery rate can reach 85% to 100% after 8 to 10 years of exploitation, and can be self-sprayed for production.

[0123] Another embodiment provides a high recovery method for oil and gas based on a waterless fracturing vehicle, comprising the following steps:

[0124] S1: Adopt the huff-and-puff method for production; select suitable nano-solvents according to the type of oil and gas field to be produced; use a waterless fracturing vehicle to make the nano-solvents into a picometer-scale microemulsion nitrogen mixture, and inject the picometer-scale microemulsion nitrogen mixture into the production well for waterless fracturing; and use the injected nitrogen to propel the picometer-scale particles of the solvent in the microemulsion to diffuse from the injection point to the surrounding area, create picometer-scale cracks in the oil and gas field reservoir, and form a picometer volume network fracture system to increase the swept volume coefficient, thereby improving the recovery rate of the entire oil and gas field;

[0125] S2: Shut down the well for more than ten days and then reopen it for production.

[0126] In some embodiments, S1 specifically includes:

[0127] S11: Nano-solvents include oil nano-solvents and rock nano-solvents; the main function of oil nano-solvents is to make oil completely non-adhesive to rocks and reduce oil viscosity; rock nano-solvents are mainly used to increase the permeability of reservoir rocks; oil nano-solvents include heavy oil nano-solvents, thin oil nano-solvents, residual oil nano-solvents, oil shale oil nano-solvents, oil sand oil nano-solvents, and tight oil nano-solvents; rock nano-solvents include sandstone nano-solvents, carbonate rock nano-solvents, coal rock nano-solvents, shale nano-solvents, and combustible ice supercooled nano-solvents; When exploiting oil fields, use suitable petroleum nano-solvents; when exploiting heavy oil, use heavy oil nano-solvents; when exploiting light oil, use light oil nano-solvents; when exploiting residual oil, use residual oil nano-solvents; when exploiting oil shale oil, use oil shale oil nano-solvents; when exploiting oil sand oil, use oil sand oil nano-solvents; when exploiting tight oil fields, use petroleum nano-solvents and rock nano-solvents; when exploiting tight gas fields, use rock nano-solvents; when exploiting coalbed methane, use coal rock nano-solvents; when exploiting shale gas, use shale nano-solvents; when exploiting combustible ice methane gas, use combustible ice supercooled nano-solvents;

[0128] S12: Multiple production wells are arranged in the entire oil and gas field. The amount of nano solvent injected into each production well is 0.8% of the pore volume of the reservoir 50 meters away from the production well. The ratio of the volume flow rate of the injected nano solvent to the volume flow rate of the injected nitrogen is less than one third. The injection time of waterless fracturing is 5 to 6 days.

[0129] S13: adding a nano solvent adapted to the type of the oil and gas field to be exploited into the liquid storage tank 23; starting the first microemulsion booster pump 21, sucking the nano solvent liquid in the liquid storage tank 23 into the interior of the pump head of the first microemulsion booster pump 21, and forming a microemulsion inside the pump head through the stirring pulse of the pump head blades, and then returning the microemulsion to the liquid storage tank 23, and forming a nano-scale microemulsion through repeated pumping and collision pulses;

[0130] S14: Start the nitrogen-making and pressurizing vehicle group 1 to produce nitrogen and pressurize the nitrogen, and pump the pressurized nitrogen into the first mixing chamber 321 of the laser microemulsion sprayer 3; after the pumped nitrogen flow rate is stable, start the second microemulsion booster pump 22, and pump the nano-scale microemulsion in the liquid storage tank 23 into the first mixing chamber 321 for gas-liquid collision mixing; start the laser emitter 31, emit laser into the first mixing chamber 321, and ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles to make picometer-scale microemulsion; the pressurized nitrogen carries the picometer-scale microemulsion from the injection channel into the second mixing chamber 322 for collision mixing; and then flows into the well through the fracturing medium outlet 326 of the second mixing chamber 322, and then pressurizes into the formation for waterless fracturing;

[0131] S2 specifically includes:

[0132] S21: After the completion of waterless fracturing, the wells are shut down for more than ten days, and all production wells are opened for production for 8 to 10 years;

[0133] S22: Arrange injection wells, which are nitrogen injection wells. All nitrogen injection wells are mainly swallowed, that is, waterless fracturing is carried out by using a waterless fracturing truck and adopting the intermittent alternating injection method of pressurized nitrogen carrying picometer-level microemulsion injection and pure pressurized nitrogen injection. The injection is continuous for 8 to 10 years and is carried out simultaneously with the waterless fracturing and production process of the production wells;

[0134] S23: When the recovery rate of the entire oil and gas field reaches more than 90%, it can be converted into geothermal water for heating or power generation; or it can be converted into an underground oil and gas reservoir to store oil and gas.

[0135] In some embodiments, S22 specifically includes:

[0136] When exploiting tight oil fields, tight gas fields, coalbed methane, shale gas and methane gas, the well pattern method is used to arrange injection wells and production wells; the central well of the well pattern is a nitrogen injection well, and the surrounding wells are production wells. All production wells and injection wells in the entire oil and gas field need to be subjected to waterless fracturing;

[0137] S23 specifically includes: using the well network method to arrange injection wells and production wells, the central well of the well network is the reinjection well, and the surrounding wells are water production wells; using rock nano-dissolving agents and using waterless fracturing vehicles to inject nitrogen into both the reinjection wells and the water production wells and inject rock nano-dissolving agents to perform waterless fracturing, and building a picometer volume network fracture system in the entire hot dry rock geothermal layer between the reinjection well and the water production well, so that an underground U-shaped tube structure is formed between the reinjection well, the hot dry rock geothermal layer connected to the reinjection well, and the water production well connected to the hot dry rock geothermal layer, and the U-shaped tube structure is used for injection and production to replace the heat of the formation for heating or power generation.

[0138] The following is a detailed introduction to the exploitation of different types of oil and gas fields:

[0139] The huff and puff method is used to exploit oil wells. In the huff and puff method, all production wells are subjected to waterless fracturing (i.e., huffing), and solvents and high-pressure nitrogen are injected. After the waterless fracturing is completed, the wells are shut down for more than ten days and then reopened for production (i.e., spitting). All nitrogen injection wells are continuously injected (huffing). The injection method is to inject high-pressure nitrogen with solvents and pure high-pressure nitrogen alternately. The so-called pure high-pressure nitrogen injection means injecting only nitrogen without adding solvents.

[0140] In some embodiments, the high recovery rate oil and gas production method based on a waterless fracturing vehicle for various oil fields, various tight oil and gas fields, coalbed methane, shale gas, and combustible ice specifically includes:

[0141] The waterless fracturing vehicle is started, and the pressurized stored nitrogen and the nano solvent in the microemulsion state are injected into the laser microemulsion sprayer group (composed of three-stage laser microemulsion sprayers 3 connected in series in sequence), so that the nano solvent in the microemulsion state is gradually transformed into picometer-level solvent particles, femtometer-level solvent particles, and ammeter-level solvent particles step by step, and the picometer-level solvent particles or femtometer-level solvent particles or ammeter-level solvent particles are mixed with high-pressure nitrogen to form a picometer-level microemulsion nitrogen mixture or a femtometer-level microemulsion nitrogen mixture or an ammeter-level microemulsion nitrogen mixture, and are injected into the production well and the injection well under the impetus of the high-pressure nitrogen to perform waterless fracturing on the production well and the injection well; the nitrogen concentration is greater than 95%, and the nitrogen outlet pressure is greater than the formation pressure.

[0142] Specifically, the high recovery rate of oil and gas production method based on waterless fracturing truck is used to carry out huff-and-puff production of various oils in various oil fields. All wells in the entire oil field must be subjected to waterless fracturing (i.e., huff-and-puff). Various oils include various heavy oils (heavy oils, extra-heavy oils), various residual oils, shale oils, oil shale oils, and oil sands oils. The nano solvent is a petroleum nano solvent. The amount of petroleum nano solvent injected into each production well and injection well is 0.8% of the pore volume of the circumferential reservoir 50 meters away from the well, and the amount of nitrogen injected is 500,000 Nm 3 The injection speed of waterless fracturing is: the injection speed of oil nano-solvent is less than one-third of the injection speed of pure high-pressure nitrogen. The injection time of waterless fracturing is 5 to 6 days. After the completion of waterless fracturing, the wells are shut down for more than ten days. All production wells are opened for production for 8 to 10 years (i.e., spitting). The original water injection wells are converted into nitrogen injection wells. All nitrogen injection wells have been using the swallowing method, that is, intermittent alternating injection of waterless fracturing and pure high-pressure nitrogen injection, and continuous injection for 8 to 10 years. The use of the huff-and-puff method for exploitation will affect more than 90% of the volume of the entire oil field reservoir, so that all kinds of oil in the entire oil field do not adhere to rocks, and the viscosity is reduced by 99%, so that the oil recovery rate of the entire development reservoir reaches more than 85%. When the recovery rate of the entire oil field reaches more than 90%, the entire block can be converted to permanent exploitation of geothermal water for heating or power generation, or it can be converted to underground oil and gas storage for oil and gas.

[0143] Among them, the injection and production of waterless fracturing: on the first day, the first microemulsion booster pump 21 is used to pump out (simultaneously pump out and discharge) 50% petroleum nano-solvent into microemulsion from the liquid storage tank 23, inject high-pressure nitrogen, inject microemulsion, inject laser, spray after mixing, and perform displacement fracturing. After every 1 hour of fracturing, shut down for 5 minutes; from the second to the sixth day, high-pressure nitrogen is injected, and laser is injected to continue fracturing. After every 1 hour of fracturing, shut down for 5 minutes; then shut down the well for more than 10 days, and then open the well to produce oil for 8 to 10 years; in the nitrogen injection well, the nitrogen concentration is greater than 95%, the nitrogen outlet pressure is greater than the formation pressure, and intermittent high-pressure nitrogen is injected with the petroleum nano-solvent microemulsion and the high-pressure nitrogen. The injection is for 8 to 10 years, and the sweep coefficient is greater than 150 meters to 200 meters away from the well. Oil wells are converted into long-term water wells, and geothermal water is permanently mined. If the temperature of the produced water is lower than 100°C, the geothermal water is used for heating; if the temperature of the produced water is higher than 100°C, the geothermal water is used for waste heat power generation; among them, nitrogen injection wells are converted into water injection wells, and the geothermal water is injected into the formation after the waste water is cooled and filtered, and heated by the underground U-shaped pipe formed between the injection well and the production well, and water is extracted for heating or power generation from generation to generation. Build an underground oil depot. When the recovery rate of the entire oil field reaches 85% to 100%, the entire oil field can be used to build an underground oil depot. When the international oil price is low, the oil is purchased and stored in the formation.

[0144] Specifically, a high-recovery oil and gas production method based on a waterless fracturing vehicle is used to produce various tight oil and gas fields using the huff-and-puff method, so that the entire oil and gas field is built into a picometer volume network fracture system. The entire oil and gas field is arranged with a well network according to the five-point method or other well network methods. The center well of the well network is a nitrogen injection well, and the surrounding wells are production wells. All wells in the entire oil and gas field must be subjected to waterless fracturing (i.e., swallowing). The nano-solvents used in various tight oil fields are petroleum nano-solvents and rock nano-solvents, and the nano-solvents used in various tight gas fields are rock nano-solvents. The amount of nano-solvent injected into each production well and injection well is 0.8% of the pore volume of the circumferential reservoir 50 meters away from the well, and the amount of nitrogen injected is 500,000 Nm 3 The injection speed of waterless fracturing is: the injection speed of oil nano-solvent and rock nano-solvent is less than one-third of the injection speed of pure high-pressure nitrogen. The injection time of waterless fracturing is 5 to 6 days. After the completion of waterless fracturing, the wells are shut down for more than ten days. All production wells are opened for production for 8 to 10 years (i.e., spitting). The original water injection wells are converted into nitrogen injection wells. All nitrogen injection wells have been using the swallowing method, that is, the injection of waterless fracturing and pure high-pressure nitrogen injection are intermittently alternated, and the injection is continuously injected for 8 to 10 years. The huff-and-puff method will affect more than 90% of the entire oil field reservoir volume, so that the oil and gas recovery rate of the entire tight reservoir reaches more than 85%. When the recovery rate of the entire oil and gas field reaches more than 90%, the entire block can be converted to permanent exploitation of geothermal water for heating or power generation, or it can be converted to underground oil and gas storage for oil and gas;

[0145] Specifically, the high-recovery oil and gas production method based on a waterless fracturing truck is used to produce coalbed methane using the huff-and-puff method. Similar to the huff-and-puff method for tight oil and gas, the entire coal seam is built into a picometer volume network fracture system. The difference in the huff-and-puff method for coalbed methane fields is that the nano-dissolver is a coal rock nano-dissolver, which is used to dissolve the ash in the nano-pores of the coal seam rock and the pore walls of the coal rock, thereby increasing the permeability of the coal seam rock from 0.05 millidarcy to more than 50 millidarcy; the amount of coal rock nano-dissolver injected into each coalbed methane well is 0.8% of the circumferential pore volume at a distance of 50 meters from the well, and the amount of nitrogen injected is 600,000 Nm 3 .

[0146] Optionally, a high-recovery oil and gas production method based on a waterless fracturing truck is used to produce shale gas using a huff-and-puff method. Similar to the huff-and-puff method for tight oil and gas, the entire shale gas reservoir is built into a picometer volume network fracture system. The difference in the shale gas huff-and-puff method is that the nano-dissolver is a shale nano-dissolver, which is used to dissolve the cement, filler and shale pore wall in the nano-pores of shale rocks, prevent clay expansion, and increase the permeability of the reservoir rock from 0.05 millidarcy to more than 50 millidarcy; the amount of shale nano-dissolver injected into each shale gas well is 0.8% of the circumferential pore volume 50 meters away from the well, and the amount of nitrogen injected is greater than 600,000 Nm 3 .

[0147] Specifically, the high recovery rate of oil and gas exploitation method based on waterless fracturing vehicle is used to exploit methane gas from combustible ice using underground U-shaped pipes with five-point well pattern method or other well pattern method, which is similar to the huff-and-puff method of tight oil and gas. The difference of the methane gas exploitation method of combustible ice huff-and-puff method is that the nano solvent is a supercooled nano solvent of combustible ice, which can not only dissolve the cement, filling material and pore wall in the nanopores of the combustible ice reservoir rock, so that the permeability of the reservoir rock is increased from 0.05 millidarcy to more than 50 millidarcy, but also supercool and liquefy methane hydrate, so that the solid methane hydrate is liquefied and the solid methane is completely freed. Among them, to avoid blowout, a small amount of rock nano supercooled solvent is used in each well each time, and a small amount of high-pressure nitrogen is injected into the waterless fracturing vehicle to displace a small amount of rock nano supercooled solvent microemulsion for fracturing; the well is opened to produce combustible ice methane; the huff-and-puff method is repeated many times until 50% of the combustible ice methane is produced. Then use the five-point well network method or other well network methods, that is, the wells around the well network continue to spit, that is, open wells to produce combustible ice methane; the wells in the center of the well network continue to swallow, that is, use a waterless fracturing vehicle or corresponding ground equipment to alternately inject high-pressure nitrogen or high-pressure nitrogen with a small amount of rock nano-supercooled solvent microemulsion; persist in producing wells spitting and injecting wells swallowing for about 5 years, so that the combustible ice methane recovery rate reaches 90%-100%, and then all wells inject carbon dioxide to generate solid carbon dioxide hydrate solid fixed formation rock in the combustible ice methane deficit area.

[0148] In some embodiments, a high-recovery oil and gas production method based on a waterless fracturing vehicle is used to develop deep geothermal water for high-recovery power generation. First, a five-point well network method or other well network methods are deployed, the central well is a reinjection well, and the wells around are water production wells. An underground U-shaped pipe is built between the reinjection well and the surrounding water production wells; the underground U-shaped pipe first builds the entire deep hot dry rock geothermal layer between the reinjection well and the water production well into a picometer volume network fracture system, so that the reinjection well, the hot dry rock geothermal layer connected to the reinjection well, and the water production well connected to the hot dry rock geothermal layer are built between the underground U-shaped pipe, and the hot dry rock geothermal water is exploited for a long time. The method for connecting the deep hot dry rock geothermal layer is to use a waterless fracturing vehicle to perform waterless fracturing on all deep hot dry rock geothermal wells (reinjection wells and water production wells), the amount of rock nanodissolver injected into each well is 0.8% of the pore volume of the deep hot dry rock geothermal layer within a circle of 0.6 to 0.8 well spacing, and the amount of high-pressure nitrogen injected is greater than 600,000 Nm 3 , and then shut down the well for more than ten days; the wells around the five-point well network are used to extract deep geothermal water for heating or power generation, and the central well of the five-point well network is used to reinject cold water after heating or power generation and filtration; the underground U-shaped pipe refers to the construction of a picometer volume network fracture system for the entire deep hot dry rock geothermal layer, with a permeability greater than 100 millidarcy, to form an injection and production U-shaped pipe for long-term replacement of the heat of the formation.

[0149] It should be noted that the production wells and injection wells in the oil and gas fields can be transformed into reinjection wells and water production wells, and the deep geothermal water can be developed by the high recovery method of oil and gas based on waterless fracturing vehicles. Reinjection wells and water production wells can also be drilled at suitable locations to the hot dry rock geothermal layer, and an underground U-shaped pipe can be constructed to form a picometer volume network fracture system in the deep hot dry rock geothermal layer to develop deep geothermal water. The greatest advantage of the high recovery method of geothermal water is that it exploits geothermal energy deep underground, ensuring that geothermal water can be exploited for heating or power generation everywhere for generations.

[0150] The vehicle body 116 of the nitrogen-making booster vehicle 11 of the present invention is an off-road vehicle with four front and eight rear wheels. In order to increase the injection volume, it can simply replace the nitrogen-making booster vehicle assembled from multiple off-road vehicles with four front and eight rear wheels, or simply replace similar ground picometer-level waterless fracturing equipment. This simple replacement should be included in the protection scope of this application. The high-recovery oil and gas production method of the present invention can simply replace the high-recovery production method of heavy oil, thin oil, residual oil, oil sand oil, and oil shale oil, and can also simply replace the high-recovery production method of coalbed methane, ultra-dense sandstone oil and gas, ultra-dense carbonate rock oil and gas, and shale oil and gas. It can also simply replace the high-recovery production method of combustible ice and hot dry rock geothermal water, and can also simply replace the construction method of underground oil (gas) depots. This simple replacement should be included in the protection scope of the present invention.

[0151] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0152] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waterless fracturing vehicle, characterized in that: include: A nitrogen production and pressurization vehicle group (1) is used to prepare nitrogen and to pressurize and inject the nitrogen into the well to be fractured for waterless fracturing; A microemulsion preparation mechanism (2) is used to prepare a nano-solvent into a nano-scale microemulsion and output it at a pressure increase; A laser microemulsion sprayer (3), the laser microemulsion sprayer (3) comprising a laser emitter (31) and a mixing container (32); a first mixing chamber (321) and a second mixing chamber (322) are provided in the mixing container (32); the outlet end of the nitrogen-generating and pressurizing vehicle group (1) is connected to the first mixing chamber (321) so as to inject nitrogen into the first mixing chamber (321); The outlet end of the microemulsion preparation mechanism (2) is connected to the first mixing chamber (321) so as to inject the nano-scale microemulsion into the first mixing chamber (321) and mix it with the input nitrogen gas by gas-liquid collision; The laser emitter (31) is optically connected to the first mixing chamber (321) to emit laser light into the first mixing chamber (321) and ablate nanoparticles in the nanoscale microemulsion to generate picometer-scale particles; The first mixing chamber (321) is connected to the second mixing chamber (322) through an injection channel, so as to inject picometer-scale microemulsion and nitrogen into the second mixing chamber (322) and perform spraying, collision and mixing to form a picometer-scale microemulsion nitrogen mixture; The second mixing chamber (322) has a fracturing medium outlet (326) that can be connected to the well to be fractured and inject pressurized nitrogen mixed with picometer-scale microemulsion into the well to be fractured to perform waterless fracturing.

2. The waterless fracturing vehicle according to claim 1, characterized in that: The laser microemulsion sprayer (3) further comprises a first spray head (33) and a second spray head (34); The mixing container (32) has a first inlet (323), a second inlet (324) and a laser inlet (325) connected to the first mixing chamber (321), and a fracturing medium outlet (326) connected to the second mixing chamber (322); an injection channel (327) is provided between the first mixing chamber (321) and the second mixing chamber (322); The first nozzle (33) is installed in the first inlet (323), and the outlet end of the microemulsion preparation mechanism (2) is connected to and communicates with the first nozzle (33), so as to spray the nano-scale microemulsion into the first mixing chamber (321) through the first nozzle (33); The outlet end of the nitrogen-generating and pressurizing vehicle group (1) is connected to and communicates with the second inlet (324) to inject nitrogen into the first mixing chamber (321); The laser emitting end of the laser emitter (31) is connected to the laser inlet (325) to emit laser light into the first mixing chamber (321) to ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; The second nozzle (34) is installed at the channel opening of the injection channel (327) corresponding to the second mixing chamber (322) to inject picometer-level microemulsion and nitrogen into the second mixing chamber (322) for spraying, collision and mixing to form a picometer-level microemulsion nitrogen mixture.

3. The waterless fracturing vehicle according to claim 2, characterized in that: The microemulsion preparation mechanism (2) comprises a first microemulsion booster pump (21), a second microemulsion booster pump (22) and a liquid storage tank (23) for filling a nano-solvent; The first microemulsion booster pump (21) is cyclically connected to the liquid storage tank (23) to cyclically pump out the nano-solvent in the liquid storage tank (23), and the nano-solvent gradually forms a nano-scale microemulsion under the action of stirring and collision; The inlet end of the second microemulsion booster pump (22) is connected to the liquid storage tank (23), and the outlet end of the second microemulsion booster pump (22) is connected to and connected to the first nozzle (33), so as to pressurize and spray the nano-scale microemulsion in the liquid storage tank (23) into the first mixing chamber (321) through the first nozzle (33) for collision mixing.

4. The waterless fracturing vehicle according to claim 1, characterized in that: The laser microemulsion sprayer (3) is multiple, and the multiple laser microemulsion sprayers (3) are sequentially connected and communicated to form a laser microemulsion sprayer group with a multi-stage series structure. The laser microemulsion sprayer group is connected and communicated with the microemulsion preparation mechanism (2) and the outlet end of the nitrogen-making and pressurizing vehicle group (1), so that the size of the nanoparticles in the nano-scale microemulsion is gradually refined and reduced through the laser ablation action of the multiple laser microemulsion sprayers (3).

5. The waterless fracturing vehicle according to claim 4, characterized in that: The laser microemulsion sprayer group comprises a first-stage laser microemulsion sprayer (3a) and a second-stage laser microemulsion sprayer (3b); The first-stage laser microemulsion sprayer (3a) comprises a first laser emitter (31a) and a first mixing container (32a); a first mixing chamber A (321a) and a second mixing chamber A (322a) are provided in the first mixing container (32a); the outlet end of the nitrogen-generating and pressurizing vehicle group (1) is connected to the first mixing chamber A (321a) so as to inject nitrogen into the first mixing chamber A (321a); ​​the outlet end of the microemulsion preparation mechanism (2) is connected to the first mixing chamber A (321a) so as to inject nano-scale microemulsion into the first mixing chamber A (321a) and perform gas-liquid collision mixing with the input nitrogen; The first laser emitter (31a) is optically connected to the first mixing chamber A (321a) to emit laser into the first mixing chamber A (321a) and ablate nanoparticles in the nano-scale microemulsion to generate picometer-scale particles; the first mixing chamber A is connected to the second mixing chamber A (322a) through the injection channel A (327a) to inject picometer-scale microemulsion and nitrogen into the second mixing chamber A (322a) and perform spray collision mixing to form a picometer-scale microemulsion nitrogen mixture; The second-stage laser microemulsion sprayer (3b) comprises a second laser emitter (31b) and a second mixing container (32b); the second mixing container (32b) is provided with a first mixing chamber B (321b) and a second mixing chamber B (322b); the second mixing chamber A (322a) is connected to the first mixing chamber B (321b) through a pipeline to spray a picometer-scale microemulsion nitrogen mixture; the second laser emitter (31b) is optically connected to the first mixing chamber B (321b) to emit laser light into the first mixing chamber B (321b); Light ablates the picometer-sized particles in the picometer-sized microemulsion nitrogen mixture to generate femtometer-sized particles, thereby forming a femtometer-sized microemulsion nitrogen mixture; the first mixing chamber B (321b) is connected to the second mixing chamber B (322b) through an injection channel B (327b) to spray the femtometer-sized microemulsion nitrogen mixture into the second mixing chamber B (322b); the second mixing chamber B (322b) has a fracturing medium outlet B (326b) that can be connected to the well to be fractured and inject pressurized nitrogen mixed with femtometer-sized microemulsion into the well to be fractured for waterless fracturing.

6. The waterless fracturing vehicle according to claim 5, characterized in that: The laser microemulsion sprayer group further comprises a third-stage laser microemulsion sprayer (3c); The third-stage laser microemulsion sprayer (3c) comprises a third laser emitter (31c) and a third mixing container (32c); a first mixing chamber C (321c) and a second mixing chamber C (322c) are arranged in the third mixing container (32c); a fracturing medium outlet B (326b) of the second mixing chamber B (322b) is connected to the first mixing chamber C (321c) through a pipeline to spray a femtometer-scale microemulsion nitrogen mixture; the third laser emitter (31c) is optically connected to the first mixing chamber C (321c) to inject the first mixing chamber C (322c) with the fracturing medium outlet B (326b) through a pipeline. 1c) emits a laser and ablates the femtometer-sized particles in the femtometer-sized microemulsion nitrogen mixture to generate ammeter-sized particles, thereby forming an ammeter-sized microemulsion nitrogen mixture; the first mixing chamber C (321c) is connected to the second mixing chamber C (322c) through an injection channel C (327c) to spray the ammeter-sized microemulsion nitrogen mixture into the second mixing chamber C (322c); the second mixing chamber C (322c) has a fracturing medium outlet C (326c) that can be connected to the well to be fractured and inject pressurized nitrogen mixed with ammeter-sized microemulsion into the well to be fractured for waterless fracturing.

7. The waterless fracturing vehicle according to claim 6, characterized in that: The first laser emitter (31a), the second laser emitter (31b) and the third laser emitter (31c) are any one of a semiconductor solid laser with an emission wavelength of 450nm and a power of 40W, a krypton laser with an emission wavelength of 6471 angstroms, a red laser with a wavelength of 620-750nm and a pulse duration of ≤1ms, and an infrared laser.

8. A high oil and gas recovery method based on the waterless fracturing vehicle according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Adopt the huff-and-puff method for production; select suitable nano-solvents according to the type of oil and gas field to be produced; use a waterless fracturing vehicle to make the nano-solvents into a picometer-scale microemulsion nitrogen mixture, and inject the picometer-scale microemulsion nitrogen mixture into the production well for waterless fracturing; and use the injected nitrogen to propel the picometer-scale particles of the solvent in the microemulsion to diffuse from the injection point to the surrounding area, create picometer-scale cracks in the oil and gas field reservoir, and form a picometer volume network fracture system to increase the swept volume coefficient, thereby improving the recovery rate of the entire oil and gas field; S2: Shut down the well for more than ten days and then reopen it for production.

9. The high oil and gas recovery method using a waterless fracturing vehicle according to claim 8, characterized in that: S1 specifically includes: S11: Nano-solvents include oil nano-solvents and rock nano-solvents; the main function of oil nano-solvents is to make oil completely non-adhesive to rocks and reduce oil viscosity; rock nano-solvents are mainly used to increase the permeability of reservoir rocks; oil nano-solvents include heavy oil nano-solvents, thin oil nano-solvents, residual oil nano-solvents, oil shale oil nano-solvents, oil sand oil nano-solvents, and tight oil nano-solvents; rock nano-solvents include sandstone nano-solvents, carbonate rock nano-solvents, coal rock nano-solvents, shale nano-solvents, and combustible ice supercooled nano-solvents; When exploiting oil fields, use suitable petroleum nano-solvents; when exploiting heavy oil, use heavy oil nano-solvents; when exploiting light oil, use light oil nano-solvents; when exploiting residual oil, use residual oil nano-solvents; when exploiting oil shale oil, use oil shale oil nano-solvents; when exploiting oil sand oil, use oil sand oil nano-solvents; when exploiting tight oil fields, use petroleum nano-solvents and rock nano-solvents; when exploiting tight gas fields, use rock nano-solvents; when exploiting coalbed methane, use coal rock nano-solvents; when exploiting shale gas, use shale nano-solvents; when exploiting combustible ice methane gas, use combustible ice supercooled nano-solvents; S12: Many production wells are arranged throughout the oil and gas field. The amount of nano solvent injected into each production well is 0.8% of the pore volume of the reservoir 50 meters away from the production well. The ratio of the volume flow rate of the injected nano solvent to the volume flow rate of the injected nitrogen is less than one-third. The injection time of waterless fracturing is 5 to 6 days. S13: adding a nano-solvent suitable for the type of oil and gas field to be exploited into a liquid storage tank (23); starting the first microemulsion booster pump (21), sucking the nano-solvent liquid in the liquid storage tank (23) into the interior of the pump head of the first microemulsion booster pump (21), forming a microemulsion inside the pump head through the stirring pulse of the pump head blades, and then returning the microemulsion to the liquid storage tank (23), and forming a nano-scale microemulsion through repeated pumping and collision pulses; S14: Start the nitrogen-generating and pressurizing vehicle group (1) to produce nitrogen and pressurize the nitrogen, and pump the pressurized nitrogen into the first mixing chamber (321) of the laser microemulsion sprayer (3); after the flow rate of the pumped nitrogen is stable, start the second microemulsion booster pump (22) to pump the nano-scale microemulsion in the liquid storage tank (23) into the first mixing chamber (321) for gas-liquid collision mixing; start the laser emitter (31), emit laser into the first mixing chamber (321) and ablate the nanoparticles in the nano-scale microemulsion to generate picometer-scale particles to produce picometer-scale microemulsion; the pressurized nitrogen carries the picometer-scale microemulsion and is sprayed from the injection channel into the second mixing chamber (322) for collision mixing; and then flows into the well through the fracturing medium outlet (326) of the second mixing chamber (322), and then is pressurized into the formation for waterless fracturing; S2 specifically includes: S21: After the completion of waterless fracturing, the wells are shut down for more than ten days, and all production wells are opened for production for 8 to 10 years; S22: Arrange injection wells, which are nitrogen injection wells. All nitrogen injection wells are mainly swallowed, that is, waterless fracturing is carried out by using a waterless fracturing truck and adopting the intermittent alternating injection method of pressurized nitrogen carrying picometer-level microemulsion injection and pure pressurized nitrogen injection. The injection is continuous for 8 to 10 years and is carried out simultaneously with the waterless fracturing and production process of the production wells; S23: When the recovery rate of the entire oil and gas field reaches more than 90%, it can be converted into geothermal water for heating or power generation; or it can be converted into an underground oil and gas reservoir to store oil and gas.

10. The high oil and gas recovery method using a waterless fracturing vehicle according to claim 9, characterized in that: S22 specifically includes: When exploiting heavy oil, thin oil, residual oil, oil shale oil, oil sand oil, tight oil field, tight gas field, coalbed methane, shale gas and combustible ice methane, the injection wells and production wells are arranged using the multi-point well pattern method; the central well of the multi-point well pattern is a nitrogen injection well, and the surrounding wells are production wells. All production wells and injection wells in the entire oil and gas field need to be subjected to waterless fracturing; S23 specifically includes: using a several-point well network method to arrange injection wells and production wells, with the central well of the well network being the reinjection well and the surrounding wells being water production wells; selecting rock nano-dissolving agents and using a waterless fracturing vehicle to inject nitrogen into both the reinjection well and the water production well and concurrently inject rock nano-dissolving agents to perform waterless fracturing, building a picometer volume network fracture system in the entire hot dry rock geothermal layer between the reinjection well and the water production well, forming an underground U-shaped tube structure between the reinjection well, the hot dry rock geothermal layer connected to the reinjection well, and the water production well connected to the hot dry rock geothermal layer, and using the U-shaped tube structure for injection and production to displace the heat of the formation for heating or power generation.

Images