171 results about "Oil shale" patented technology

The invention provides a new method for calculating the borehole wall collapse pressure of a fractured shale stratum, which comprises the following steps of: 1, preparing an experimental rock sample, and carrying out sound wave characteristic test on bed rock and a fractured rock sample and mechanical experiment test on the rock sample; step 2, calculating an integrity coefficient K upsilon, a geological strength index GSI, a rock mass disturbance coefficient D and a lithology index mi of the rock; 3, a Hoek-Brown strength criterion for evaluating the fractured formation based on sound waves is established; 4, a principal stress expression of the well walls of the inclined well and the horizontal well is obtained through calculation; and 5, establishing a fractured oil shale formation borehole wall collapse pressure calculation model. According to the new method for calculating the well wall collapse pressure of the fractured shale formation, the problem that a conventional homogeneous formation collapse pressure calculation model is not suitable for well wall stability prediction of the fractured shale formation is solved, and a new theoretical basis and technical support are provided for the well wall stability problem in the oil shale exploitation process.

The invention discloses a geothermal development oil shale and CO2 geological storage integrated method, which relates to the field of complex oil and gas reservoir development, and comprises the following steps: designing U-shaped well process parameters, enabling CO2 fluid to flow to a high-temperature geothermal reservoir through a descending section of a U-shaped well, injecting the CO2 fluid into the oil shale reservoir along an ascending section of a shaft after sufficient heat exchange, preheating the oil shale, and storing the CO2 fluid into a high-temperature geothermal reservoir through the descending section of the U-shaped well. Terrestrial heat extraction and utilization are realized; after the temperature of the oil shale layer rises to the target temperature, the oil shale layer is further heated through manual heating, and in-situ conversion development of the oil shale is achieved; after completion, produced CO2 is injected into the oil shale layer again through the U-shaped well, and collaborative development of CO2 geological storage, geothermal extraction and oil shale in-situ conversion is achieved. Geothermal energy is efficiently extracted through CO2 and used for oil shale in-situ pyrolysis, the extra manual heating cost needed by oil shale in-situ conversion is remarkably reduced, and the economic feasibility of a pure storage project and oil shale in-situ conversion development is improved.

The present disclosure relates to a dust-removed odor sampling device for oil shale and a photoelectric fused method for underground in-situ exploration and thermal evolution stage monitoring of oil shale, belonging to the technical field of oil shale in-situ exploration and exploitation. The present disclosure includes: establishing an dust-removed odor sampling device, which includes an imitation sandfish lizard dustproof chamber, an imitation leaf filter membrane, a single-chip microcomputer controller, a dust collection box, a solenoid valve and an air pump; using a redesigned FB score and a feature selection algorithm to optimize a gas sensor array and reduce the apparatus volume and energy consumption; and combining the optimized gas sensor array with the optical gas detector to realize the underground in-situ exploration and thermal evolution stage monitoring of oil shale by the photoelectric fusion method.

The invention relates to a mineral multi-stage separation and upgrading system, which belongs to the technical field of mineral separation and upgrading, and comprises a first separation bed body and a separation assembly arranged on the first separation bed body, the separation assembly comprises a plurality of air chambers which are continuously arranged on the lower side of the first separation bed body along the length direction of the first separation bed body; the multiple air distribution holes are vertically formed in the bed surface of the first separation bed body at equal intervals, and the multiple air valves are vertically and fixedly arranged at the bottom of the air chamber in a one-to-one correspondence mode. Through cooperative use of the air chamber and the air distribution holes in the first separation bed body, airflow is blown out from the air distribution holes, so that oil shale particles on the bed surface are in a fluidized state and move in the length direction of the bed surface, and the oil shale particles are separated from the air distribution holes; pulse airflow is output by the air valve and is blown out through the air distribution holes, so that the movement activity of the stacked and interlaced oil shale particles on the bed surface is enhanced, the oil shale is loose, fluidized and uniformly distributed, the separation of concentrate and gangue is realized, the separation effect of the oil shale particles is ensured, the grade of the oil shale is improved, and the energy consumption of a subsequent pyrolysis oil extraction process of the oil shale is reduced.

The invention provides an oil shale formation temperature field simulation method and system for fluid injection heating mining, a storage area is divided into a plurality of unit mining spaces according to geologic feature data of the storage area to be mined, a mass conservation operation model corresponding to fluid injection in-situ mining is constructed for each unit mining space based on the principle of mass conservation, and the temperature field of the oil shale formation is simulated. According to the principle that high-temperature fluid carries heat to conduct heat transfer and exchange with a rock mass system in a conduction and convection mode and the influence on a temperature field in a rock mass, an energy operation model corresponding to fluid injection in-situ mining is built; preset initial parameters are introduced, the mass conservation operation model and the energy operation model are solved based on the discrete process, initial mass field data and energy field data are calculated, and then temperature field data of subsequent time are calculated in combination with a Newton iteration method. According to the scheme, the limitation of low precision of existing temperature field simulation is overcome, and rigorous and accurate temperature field space-time distribution of the oil shale under fluid injection heating is obtained.

The invention provides an iron-based catalyst for in-situ exploitation of oil shale as well as a preparation method and application of the iron-based catalyst. The iron-based catalyst for in-situ exploitation of the oil shale comprises the following raw materials: a first active component metal element, a second active component metal element and a silicon source, the metal elements of the first active component comprise iron and auxiliary metal elements in a molar ratio of 1: (0-10), and the metal elements of the second active component comprise one or a combination of more than two of molybdenum, nickel, cobalt and tungsten; the molar ratio of the first active component metal element to the second active component metal element is (1-20): 1; the iron-based catalyst for in-situ exploitation of oil shale is prepared by emulsifying raw materials containing a first active component metal element, a second active component metal element and a silicon source. The iron-based catalyst for in-situ exploitation of the oil shale is stable in structure and can be applied to in-situ exploitation of the oil shale under wide temperature and pressure conditions.

The invention provides an oil shale supercritical CO2 fracturing and in-situ conversion integrated device and a working method, belongs to the technical field of oil shale exploitation, and realizes efficient cooperation of supercritical CO2 fracturing and in-situ conversion by integrating a CO2 liquefaction storage system, a fracturing heating system, a stratum simulation system and a data monitoring system. The device comprises a CO2 liquefying and storing system, a CO2 liquefying and storing system, a CO2 liquid storage system, a CO2 liquid storage system and a CO2 liquid storage system, the oil shale fracturing and heating system is used for fracturing the rock core under the simulated formation confining pressure condition and triggering the oil shale in-situ cracking reaction through medium-frequency heating; the oil shale fracturing model is used for simulating an underground fracturing environment and guiding crack propagation; the data monitoring system collects temperature and pressure parameters in real time to optimize process regulation and control. The fracturing process and the conversion process are innovatively coupled, the supercritical CO2 has the characteristics of a fracturing medium, a heat transfer carrier and a reaction medium, the energy utilization rate and the CO2 circulation efficiency are remarkably improved, and the oil shale recovery rate is increased.

The invention relates to the technical field of mine filling materials, in particular to a composite filling cementing material and a preparation method thereof, and the composite filling cementing material comprises the following components: oil shale slag, ironmaking slag, clay mineral slag, Portland cement, a composite activator and a polycarboxylate superplasticizer. The composite activator comprises the following components: water glass, sodium carbonate, metakaolin, anhydrous sodium sulfate, calcium sulphoaluminate, dolomite, silica fume, potassium feldspar and an excitation accelerator. The gelling part is completely composed of various industrial wastes, the materials are convenient to obtain, the manufacturing cost is low, the composite exciting agent can effectively excite the potential activity of the oil shale residues, the ironmaking slag and the clay mineral residues and promote the hydration reaction of the oil shale residues, the ironmaking slag and the clay mineral residues, and the prepared composite filling gelling material has good moisture resistance and good durability.

The invention discloses an artificial geothermal reservoir construction and development method based on oil shale reverse oxidation, and belongs to the technical field of resource exploitation, the method comprises the following steps: reservoir well construction: arranging an injection well, an exploitation well and a heat recovery well in a target layer section; an initial high-temperature environment is formed through manual heating, so that the oil shale is pyrolyzed to generate fixed carbon; injecting air to form an oxygen-enriched environment, initiating a fixed carbon oxidation self-heating reaction, and continuously pyrolyzing the oil shale; terrestrial heat is exploited through a circulating working medium, the air flow and components are dynamically controlled, and temperature control and safe operation are achieved; and finally reinjecting and sealing the carbon dioxide. The device can convert low-grade oil shale into clean geothermal energy, and has the advantages of energy conservation and environmental protection.

The invention relates to the technical field of improvement methods, in particular to a soil conditioner based on ultramicro-granulated energy-gathered humic acid, and energy-gathered humic acid raw materials of the soil conditioner based on ultramicro-granulated energy-gathered humic acid comprise weathered coal, lignite, peat, oil shale, an auxiliary additive, a thermophilic bacterial agent, an organic fertilizer and an inorganic fertilizer. According to a formula, the ratio of weathered coal to lignite to peat to oil shale to an auxiliary additive to a thermophilic bacterial agent to an organic fertilizer to an inorganic fertilizer is 4: 4: 2: 2: 1: 1: 2: 2; the ultramicro-pelletized energy-gathered humic acid soil conditioner is prepared by adopting a soil conditioner preparation method. According to the soil characteristics of the desert area, local materials can be used for improving the soil of the desert area, the soil structure of the desert area is improved, the fertility is improved, and the ecological balance of the soil is maintained.

The present application discloses a preheating and pressure-regulating device for alternating gas injection of oil shale, which comprises: a shell, a supporting foot, an upper cover, an air outlet pipe, a temperature sensor, an inlet pipe, an electrically controlled valve, a flow sensor, a pressure sensor, a control cabinet, an impeller, a rotating shaft, an air outlet plate, a bearing, an inner gear ring, a through hole, an upper disc, a heat-conducting straight pipe, a heat-conducting tooth, a cylindrical gear, an annular groove, an annular seat, a connecting block, a power supply plug, a fixed outer ring seat, a first flexible rubber ring sheet, a second flexible rubber ring sheet, a heating rod, a supporting seat, a ball bearing, a fixed annular ring, an annular groove, a cam, an annular conductive sheet, an annular slide groove, a fixed carrier sleeve, an annular carrier groove and an annular edge sheet. The benefit of the present application is that it is heated by a plurality of heating rods, and the heating rods are evenly installed at the bottom of the upper disc, so that the heating rods can rotate with the upper disc, thereby facilitating the heating of the gas inside the shell and improving the uniformity of heating.

The invention discloses oil shale waste / fly ash glass ceramics as well as a preparation method and application thereof, relates to the technical field of glass ceramics, and solves the problems that in the prior art, OSA post-treatment is serious in environmental harm and low in resource utilization rate, and when OSA is applied to glass ceramics preparation, the crystal phase structure is unstable, the process controllability is poor, and the production cost is high. And high quality, low cost and sustainable utilization of the microcrystalline glass are difficult to realize at the same time. The oil shale waste / fly ash glass ceramic is prepared from 80 parts of industrial waste residues, 4-6 parts of nucleating agent and 14-16 parts of auxiliary components, the industrial waste residue is composed of 50-75 parts of oil shale residue and 5-30 parts of fly ash; the preparation method comprises the following steps: mixing the oil shale waste with the fly ash, adding the nucleating agent and the auxiliary components, grinding, melting, preserving heat, pouring the melt into a mold, and annealing to obtain base glass; and carrying out polishing treatment and heat treatment on the base glass to obtain the microcrystalline glass. The invention can be applied to the fields of building decoration and electrical insulating materials.

The invention discloses an oil shale in-situ oxidation heat collection system and method, and belongs to the technical field of oil shale in-situ development and utilization. Comprising a well pattern structure and a ground power generation device. The well pattern structure comprises an injection well, a heat recovery well and a plurality of observation wells; an electromagnetic sensor is arranged in each observation well, the oil shale layer is fractured through hydraulic fracturing to form fractures, the injection well communicates with the heat recovery well, and nanometer magnetic induction particles are added into fracturing fluid to serve as a propping agent; the observation well is used for monitoring the distribution condition and the magnetic field intensity of the nano magnetic induction particles; organic matters and fixed carbon in the oil shale are directly oxidized to release heat in an underground in-situ state, low-temperature steam is used as a heat transfer fluid to extract heat energy released by oxidation of the oil shale for power generation, and the method can be used for development of oil gas resources of the oil shale and shale with medium and low maturity.

The invention discloses a method for identifying algae bombardment type oil shale based on carbon isotopes and biomarkers, and belongs to the field of testing or analyzing materials by means of measuring chemical or physical properties of the materials.The method comprises the steps that firstly, Soxhlet extraction is conducted on a cleaned, dried and smashed sample, and soluble organic matter and residual rock powder are obtained; separating the soluble organic matter family components to obtain saturated hydrocarbon and aromatic hydrocarbon components; then extracting residual rock powder kerogen, and analyzing carbon isotope; the method comprises the following steps: according to gas chromatography-mass spectrometry biomarker data of saturated hydrocarbon and aromatic hydrocarbon components, obtaining a 4-methylstane index, a ratio of C30 tetracyclic polyisoprene to C27 rearrangement stane and a ratio of phenanthrene series to naphthalene series; and finally, analyzing a parameter correlation relationship, dividing parameter boundaries where different lithologic sample plumbing areas are located, and establishing an algae bomb type oil shale quantitative identification standard based on the carbon isotope and the biomarker. According to the method, scientific, accurate and reliable identification of the algae bombardment type oil shale is realized.

The application discloses a catalytic combustion heater principle prototype, which comprises an air tank, a methane tank, a mixed gas tank and a combustion chamber, the air tank is connected with the mixed gas tank through a connecting pipeline, the gas outlet of the mixed gas tank is connected with the methane tank and the combustion chamber through two connecting pipelines respectively, the top of the combustion chamber is provided with a mixed gas inlet, and a blower is arranged outside the combustion chamber, the application simulates the operation state of the underground catalytic combustion heater, high-temperature tail gas released by catalytic combustion mixed gas is used for heating oil shale layers, so that the oil shale is pyrolyzed to obtain the purpose of exploiting oil and gas, the simulation reference result of the experimental prototype can be understood as the actual operation result, the application not only reduces the exploitation cost of the oil shale in-situ conversion exploitation, but also improves the oil and gas exploitation efficiency, reduces the exploitation cost and reduces the harm of the toxic tail gas generated by incomplete combustion to animals, plants and the environment caused by direct release of the toxic tail gas into the atmosphere.

The invention discloses an oil shale in-situ conversion and carbon sequestration method by injecting high-temperature carbon dioxide and cooperating with sodium capsules, and belongs to the technical field of fossil energy in-situ exploitation and carbon sequestration. The method comprises the following steps: firstly, determining a target development area and formulating a corresponding development strategy; then, the oil shale reservoir is subjected to fracturing transformation; then, the oil shale reservoir is heated, supercritical carbon dioxide is injected, and displacement recovery is conducted; then, sodium capsule suspension fluid is injected into the oil shale reservoir, and solid-phase geological storage is achieved; and finally, after oil and gas exploitation reaches the economic limit, all the injection wells and the production wells are closed, and final geological storage is completed. According to the method, the carbon dioxide geological sequestration technology and the oil shale in-situ conversion process are deeply fused, the oil shale recovery efficiency is remarkably improved, the geological sequestration of the carbon dioxide is synchronously achieved, and the method has important significance in the fields of carbon emission reduction and fossil energy in-situ exploitation.

The invention relates to a desulfurization method of oil shale residues, which comprises the following steps: step 1, crushing the oil shale residues at room temperature, and then carrying out ball milling on the oil shale residues in a ball mill to obtain refined particles; 2, carrying out heat preservation and desulfurization on the refined particles in a muffle furnace; 3, the desulfurized refined particles obtained in the step 2 are soaked in an alkaline solution, then neutralized with an acid solution and finally washed repeatedly with clear water; and 4, drying the refined particles obtained in the step 3. The desulfurization method provided by the invention can effectively reduce the content of sulfur element in the oil shale residues and reduce the harm of the oil shale residues to the environment; the invention further provides cement mortar prepared from the oil shale residues prepared by the desulfurization method, the cement mortar is higher in compressive strength and flexural strength, lower in porosity, higher in density and higher in applicability, the production cost is saved, and the environment-friendly concept of recycling solid waste is met.

The invention discloses a method and system for determining the in-situ limit exploitation depth of oil shale, and the method comprises the steps: measuring the permeability under different depths according to an oil shale sample of an oil shale in-situ region to be evaluated; performing a pyrolysis experiment on the oil shale sample to obtain the composition of each simulated product and the components of each simulated product changing along with the temperature, and fitting a pre-constructed kerogen pyrolysis-based multi-step total reaction model on the basis of the composition and the components, so as to obtain fitted model coefficients and reaction kinetic parameters; predicting a formation temperature field formed on the basis of a heating condition of high-temperature fluid injection in the current formation, and predicting a yield change curve on the basis of the formation temperature field in combination with the permeability at different depths, the model coefficients and the reaction kinetic parameters; and establishing an income prediction model related to the to-be-evaluated oil shale in-situ area, and obtaining the limit mining depth when the income value is zero according to the yield change curve.

The application provides a wellbore safety experiment device and method for electric heating in-situ exploitation of oil shale, and the wellbore safety experiment device comprises a thermal insulation layer, a simulated injection-production assembly arranged outside the thermal insulation layer, and oil shale raw rock, a simulated wellbore assembly, a simulated production pipe column assembly and a first stress collection assembly arranged in the thermal insulation layer. The sealed cavity is heated by an electric heater, heat is transmitted to the oil shale raw rock through the oil pipe, the casing and the closed wellbore, the cracked product of the oil shale raw rock after being heated and cracked flows into the oil pipe through the product channel, the cracked product in the oil pipe is collected through the simulated injection-production assembly, the temperature in the oil pipe is collected through the first temperature sensor, the stress borne by the casing and the oil pipe at different positions is collected in real time through the first stress collection assembly, the real downhole in-situ exploitation process is simulated, the safety of the casing and the oil pipe can be evaluated in advance before downhole exploitation, and the safety and reliability of the casing and the oil pipe during downhole exploitation can be ensured.

The invention relates to a polymer composite material, which contains polymer from 10 to 99 % by weight and residual material remaining from the production of chalk from oil shale ash deposited on the hill from 1 to 90% by weight. Preferably, the residual material left over from the production of chalk from oil shale ash deposited on the hill is pre-ground and the particle diameter is less than 15 μm, preferably 97% of the particle diameter is up to 8 μm.

The invention discloses an intelligent irrigation system based on oil shale reservoir stress regulation and control, and relates to the technical field of intelligent irrigation, and the system comprises a data acquisition end, a stress analysis end and an irrigation decision end. According to the invention, the first irrigation unit uses an SVM classification model to decide the irrigation opportunity, accurately discriminates the critical state of vegetation water demand based on multi-source features, avoids the blindness of the traditional irrigation decision based on experience or a fixed period, and enables the irrigation start to adapt to the ecological water demand rhythm, and the second irrigation unit calculates the irrigation water amount through neural network regression. The water demand and multi-factor mapping are accurately quantified by utilizing the learning ability of the model for the complex nonlinear relationship, meanwhile, the water amount is dynamically adjusted by calculating the irrigation target value from the water-saving and ecological two-dimensional power generation, the water-saving coefficient and the ideal humidity are adjusted in combination with the stress change rate, and the water-saving effect is improved while vegetation growth is guaranteed through irrigation. The method is adaptive to the stress environment of the oil shale reservoir, and the balance of efficient utilization of water resources and ecological protection is realized.

The invention discloses a carbon emission determination method and device based on oil shale in-situ exploitation. The method comprises the following steps: determining an energy consumption type corresponding to each exploitation link in the oil shale in-situ exploitation; according to the energy consumption type corresponding to each mining link, determining the carbon emission of each mining link; the greenhouse gas dissipation amount in the oil shale in-situ exploitation is obtained, and the total carbon emission amount of the oil shale in-situ exploitation is determined according to the carbon emission amount and the greenhouse gas dissipation amount of each exploitation link. The method can accurately determine the carbon emission in the whole oil shale in-situ exploitation process.

The invention discloses an oil shale underground hydro-liquefaction system and method, and belongs to the technical field of oil shale in-situ exploitation. According to the oil shale underground hydro-liquefaction system, an injection well, a fracturing well and a production well are arranged in an oil shale exploitation area. A fracturing medium is injected into the oil shale layer through the fracturing well for fracturing, and an oil-gas channel is generated; a hydrogen-donating solvent and catalyst mixed suspension is injected into an oil shale stratum through a fractured well, then CO is injected into the fractured well and is introduced into the underground oil shale stratum through microwave heating, and a wellhead of the fractured well is sealed; and finally, supercritical water is injected into the oil shale stratum through the injection well. In a fracture network and pores of an oil shale stratum, supercritical water and CO are subjected to a supercritical water-gas shift reaction, and oil shale is subjected to in-situ hydro-liquefaction under the action of the supercritical shift reaction, a hydrogen-donating solvent and a catalyst to generate an oil-gas product. Oil-gas products are discharged to the ground through the production well and are separated through the gas-liquid separator and the oil-water separator, and underground hydro-liquefaction exploitation of the oil shale is completed.

This invention relates to the field of inorganic non-metallic adsorbent technology, specifically an oil shale slag nanocomposite adsorbent, its preparation method, and its application. It addresses the problems of low controllability, poor stability, poor adsorption effect, poor repeatability, and short cycle life associated with the application of oil shale slag as an adsorbent. The invention involves dispersing oil shale slag powder in a sodium silicate nonahydrate aqueous solution, stirring, and ultrasonicating to obtain suspension 1. A manganese sulfate aqueous solution is added to suspension 1 to obtain suspension 2. Suspension 2 undergoes a hydrothermal reaction, and the reaction product is centrifuged until the pH is neutral. The product is then dried, ground, and sieved to obtain the oil shale slag nanocomposite adsorbent, which can be applied to the adsorption of organic dyes. This invention significantly improves the reactivity, removal capacity, and adsorption stability of the oil shale slag nanocomposite adsorbent for organic pollutants, exhibiting excellent repeatability and cycle life, providing an economical, environmentally friendly, and sustainable solution for water treatment and solid waste management.

The invention relates to the field of oilfield chemistry, and discloses a method for pyrolyzing oil shale. The method comprises the following steps: performing first mixing on oil shale, nano copper oxide and chromium trichloride, and performing pyrolysis under the condition of not lower than 300 DEG C; wherein relative to 100g of the oil shale, the dosage of the nano copper oxide is 8 to 30g; the mass ratio of the chromium trichloride to the nano copper oxide is 1: (4-25). The oil shale can be efficiently pyrolyzed into n-alkanes and aromatic hydrocarbons with long and short chains and few branched chains, soluble organic matters and gases are obtained, and oil gas can be obviously discharged from the ground more easily.

The invention provides a solid waste-based cementing material as well as a preparation method and application thereof, and relates to the technical field of building materials. The solid waste-based cementing material comprises the following components in parts by weight: 35-45 parts of slag, 25-35 parts of modified oil shale residues, 15-25 parts of desulfurized gypsum and 1-12 parts of a modifier, wherein the modifying agent is prepared from calcium hydroxide and high belite sulphoaluminate cement. According to the solid waste-based cementing material, on the premise of ensuring that the solid waste-based cementing material has high strength in the early stage and the later stage, the setting time of the solid waste-based cementing material can be regulated and controlled according to actual engineering requirements. Meanwhile, main raw materials adopted by the invention are all industrial solid wastes, the industrial solid wastes can be stably utilized in a large proportion, efficient utilization of industrial solid waste resources is achieved, the P.O 42.5 cement strength standard can be reached only by doping a small amount of performance modifier, the production cost is remarkably reduced, and the environmental pressure is reduced.

The utility model relates to the technical field of petroleum shale gas drills, and discloses a sand-prevention hand-hydraulic dual-drive plug valve for fracturing, which comprises a plug valve, a hydraulic driver, a hand wheel, a gasket, a screw, a bolt and a nut, and is characterized in that the plug valve is connected with the hydraulic driver through the bolt, the nut is in threaded connection with the outer surface of the bolt, and the hand wheel is arranged on the hand wheel. The plug valve and the hydraulic driver are in transmission through a flat key, a copper ring is installed between the hand wheel and the hydraulic driver, and the gasket is installed at the top end of the hand wheel through a screw. According to the sand-prevention hand-hydraulic dual-drive plug valve for fracturing, the hydraulic drive mode and the manual drive mode can be achieved, remote drive and emergency drive are achieved, the plug valve of a floating type sand-prevention structure is adopted, good erosion resistance and scouring resistance are achieved, the plug valve is particularly suitable for high-flow occasions for fracturing, and sand can be effectively prevented from entering a valve cavity; the valve cover, the plug cock, the plug cock arc piece and the like are all uniquely designed, the requirement for on-site maintenance and replacement can be met conveniently, and the production efficiency is improved.

The invention provides a liquid catalyst system for in-situ conversion of oil shale as well as a preparation method and application of the liquid catalyst system. The preparation method of the liquid catalyst system comprises the following steps: (1) heating a transition metal salt I aqueous solution to a reaction temperature, and then adding a sodium hydroxide aqueous solution for reaction; after the reaction is completed, centrifuging and washing to obtain transition metal hydroxide; (2) mixing organic acid with the transition metal hydroxide obtained in the step (1), and reacting; after the reaction is finished, separating liquid, washing and drying to obtain a liquid catalyst; and (3) mixing the liquid catalyst with the transition metal salt II, and uniformly stirring to obtain the catalyst. The liquid catalyst system has excellent hydrophilicity and lipophilicity, is high in diffusivity in oil shale, can penetrate into the oil shale, improves the mass transfer efficiency, remarkably reduces the pyrolysis temperature, effectively improves the oil and gas recovery rate, and has important significance in promoting the in-situ conversion industrial application of the oil shale.

The invention relates to the technical field of oil shale production, in particular to a method for improving the recovery rate of tar in gas of a venturi tower, and aims to solve the problem that in the gas conveying process of the venturi tower at present, due to the fact that the temperature of a pipeline is too high, light oil gas is usually very volatile, and finally the oil recovery rate is affected. According to the method, a plate type heat exchanger is additionally arranged at the rear end of an air cooler ring in series, treated coal mine water or tap water is used as a cold source to cool cold ring circulating water again, the temperature of the cold ring circulating water is reduced, the cold ring circulating water enters a rotational flow plate tower to wash coal gas, the temperature of the coal gas is effectively reduced, and the temperature of the coal gas is effectively reduced through real-time adjustment of a PLC temperature control system. And the temperature of the coal gas can be reduced to an ideal temperature required by oil catching of the high-voltage electrostatic oil catcher, so that oil-gas condensation and separation are effectively promoted, and the oil recovery rate is greatly improved while the cyclic utilization rate of mine water is increased.

The present invention provides a method for predicting the production capacity of in-situ steam injection mining of oil shale, which belongs to the technical field of oil and gas field development. The method for predicting the production capacity of in-situ steam injection mining of oil shale uses the steam front evolution theory, combined with the basic characteristics of the pyrolysis reaction of kerogen in oil shale, to divide the entire oil shale reservoir during the steam injection in-situ mining process into different areas, establish a mathematical model for the in-situ steam injection mining of oil shale, and use it to predict its production capacity, while reflecting the different development stages of the oil shale reservoir; the production capacity prediction method belongs to the field of oil and gas field development, and can solve the problems of existing production capacity prediction methods such as numerous calculation parameters and poor calculation ability, which greatly increase the difficulty of solving the model and the model is prone to non-convergence, so that the production capacity settlement result cannot be given; at the same time, it can also solve the problems of existing methods such as difficulty in correcting the reaction model according to actual conditions, involving multiple experimental tests and theoretical calculations, and complex actual operations resulting in poor practicality.