21 results about "Shale oil extraction" patented technology

This invention belongs to the field of shale oil extraction technology, specifically an online mixing device for preparing fracturing fluid using polymer dry powder. Addressing the potential for agglomeration of the dry powder during thickening and mixing, which hinders effective dispersion in water and leads to insufficient fluid concentration and reduced proppant carrying capacity, the invention proposes the following solution: a mixing platform equipped with a water tank, and the water tank having a water delivery pipe and an inlet pipe. This online mixing device for preparing fracturing fluid using polymer dry powder improves the quality of fracturing fluid mixing. During mixing, the device actively intervenes to prevent polymer dry powder agglomeration, ensuring the powder is dispersed upon entering the venturi tube. Simultaneously, the negative pressure generated by the high-speed water flow through the throat of the venturi tube rapidly draws in the powder, enhancing the mixing effect.

This invention discloses an intelligent shale oil flowback system based on multiphase critical flow rates in horizontal wells, relating to the field of intelligent control technology. It includes a data acquisition and generation module that acquires real-time data, preprocesses it, and generates a real-time estimation vector; a construction and writing module that builds an adversarial network, takes the real-time estimation vector as input, outputs the optimal critical vector, defines the state space and action space, and applies a reinforced decision-making mechanism to generate the final pumping rate before writing it into a register to execute the pumping operation; and a calculation and judgment module that, based on the pumping operation, reacquires real-time data to calculate the trigger value and determines whether the pumping operation has fallen into an invalid steady state based on the trigger value. This invention not only optimizes flowback flow rates in real time but also provides a more flexible and precise control strategy in the face of variable downhole environments, thereby effectively improving the production efficiency and economic benefits of shale oil extraction.

This invention belongs to the field of shale oil production prediction technology, and discloses a method for shale oil production prediction and parameter optimization based on physical information constraints. It constructs a training database by designing samples using Latin hypercube sampling and simulating them using an integrated geological engineering model. A neural network model integrating physical information constraints is built, including a fracture volume prediction model and a production prediction model, and trained by combining data-driven loss and physical law loss in the loss function. Using the trained model as a surrogate model, and combining it with the NSGA-II multi-objective optimization algorithm, iterative optimization of fracture volume, single-well production, and net present value of the entire area is performed in three levels to obtain differentiated fracturing operation parameter schemes for different reservoir types. This invention effectively improves the accuracy and physical interpretability of production prediction under small sample conditions, and can efficiently optimize fracturing parameters, significantly improving the economic benefits of shale oil extraction.

Non-hydraulically reactive blended particulate compositions for use in making low carbon blended cement or low carbon concrete include a pozzolanic component having a first D90 and a mineral filler component having a second D90 greater than the first D90 dry blended without intergrinding, wherein the composition is free of hydraulic cement. The pozzolanic component can have a D90 less about 45 μm and the mineral filler can have a D90 greater than about 45 μm. The pozzolanic material can be fly ash, bottom ash, metallurgical slag, silica fume, metakaolin, volcanic ash, natural pozzolan, calcined shale, calcined clay, and / or ground glass. The mineral filler component can be aggregate fines, quarry fines, limestone powder, granite fines, stone dust, rock dust, marble dust, mine tailings, pulverized bottom ash, pulverized metallurgical slag, ground recycled concrete, pulverized shale from shale oil extraction, or pulverized sand from tar sand extraction.

Non-hydraulically reactive blended particulate compositions for use in making low carbon blended cement or low carbon concrete include a pozzolanic component having a first D90 and a mineral filler component having a second D90 greater than the first D90 dry blended without intergrinding, wherein the composition is free of hydraulic cement. The pozzolanic component can have a D90 less about 45 μm and the mineral filler can have a D90 greater than about 45 μm. The pozzolanic material can be fly ash, bottom ash, steel slag, silica fume, metakaolin, volcanic ash, natural pozzolan, calcined shale, calcined clay, and / or ground glass. The mineral filler component can be aggregate fines, quarry fines, limestone powder, granite fines, stone dust, rock dust, marble dust, mine tailings, pulverized bottom ash, pulverized metallurgical slag, ground recycled concrete, pulverized shale from shale oil extraction, or pulverized sand from tar sand extraction.

Non-hydraulically reactive blended particulate compositions for use in making low carbon blended cement or low carbon concrete include a pozzolanic component having a first D90 and a mineral filler component having a second D90 greater than the first D90 dry blended without intergrinding, wherein the composition is free of hydraulic cement. The pozzolanic component can have a D90 less about 45 μm and the mineral filler can have a D90 greater than about 45 μm. The pozzolanic material can be fly ash, bottom ash, steel slag, silica fume, metakaolin, volcanic ash, natural pozzolan, calcined shale, calcined clay, and / or ground glass. The mineral filler component can be aggregate fines, quarry fines, limestone powder, granite fines, stone dust, rock dust, marble dust, mine tailings, pulverized bottom ash, pulverized metallurgical slag, ground recycled concrete, pulverized shale from shale oil extraction, or pulverized sand from tar sand extraction.

A method for evaluating the reservoir pressure field during in-situ heated shale oil extraction is applied in the petroleum development field. The method comprises the following steps: ① Constructing a three-dimensional grid model of the shale oil reservoir between two horizontal wells; ② Evaluating the porosity of each reservoir grid unit after compression based on the temperature field, porosity, and volumetric thermal expansion coefficient of the reservoir skeleton; ③ Evaluating the volume of each fluid in each reservoir grid unit under constant pore fluid pressure based on the reservoir temperature field, fluid saturation, fluid thermal expansion coefficient, and natural gas solubility characteristics in oil; ④ Evaluating the pore fluid pressure in each reservoir grid unit based on the compressibility coefficient of each fluid at the corresponding temperature, combined with the reduction in porosity and the volume of each fluid after thermal expansion, thereby obtaining the pressure field of the shale oil reservoir.

The utility model discloses a shale oil extraction device for oil exploration, which comprises an extraction cylinder and a mounting rack, the middle position of the outer side of the extraction cylinder is rotatably arranged between the upper ends of the inner side of the mounting rack, and a control panel is further mounted on one side of the interior of the mounting rack; a set of locking mechanism is arranged on the outer side, away from the control panel, of the mounting frame; and the outer side of the middle of the extraction barrel is fixed to the two sides of the bottom of a closing plate through two sets of electric push rods, and an embedded barrel is fixed to the inner position of the extraction barrel. The shale oil extraction device for oil exploration is provided with the locking mechanism, through the arrangement of the locking mechanism, the extraction barrel can be in a locked state, and through large-angle rotation, the inlet position of the upper end of the extraction barrel can be inclined downwards, so that impurities in the extraction barrel can be conveniently discharged and treated; and in addition, through arrangement of a reciprocating screw rod and a crushing block, the shale in the embedded cylinder can be fully crushed.

A low-to-medium maturity shale oil extraction system based on curtailed power heating includes a transmission line with an input terminal electrically connected to curtailed power from a wind and PV power generation base and an output terminal electrically connected to an input terminal of a surface control platform, where downhole electric heaters are located inside a heating well; the heating well penetrates through an upper sealing layer and is located in a reservoir; downhole temperature and pressure monitoring controllers are provided in the heating well; the downhole temperature and pressure monitoring controller is electrically connected to the downhole electric heater; and a production well penetrates through the upper sealing layer and is located at a side of the heating well adjacent to the ground in the reservoir. The system avoids resource waste caused by power curtailment, enhances energy utilization efficiency, and improves the mobility and recoverability of shale oil.

This invention provides a drag reduction and friction reduction device for drilling in tight oil shale oil extraction, comprising a leveling and friction reduction component and an oscillating and friction reduction component, wherein the leveling and friction reduction component is disposed above the oscillating and friction reduction component; the leveling and friction reduction component includes at least a leveling component capable of acting on the inner wall of the borehole for crushing and leveling the inner wall; the oscillating and friction reduction component is capable of axial oscillation. The axial movement of the leveling section itself drives the leveling roller or leveling teeth to perform leveling actions. During operation, the output end of the leveling oscillator first contacts the second phase of the leveling seat, and then contacts the first phase, thereby improving the leveling efficiency of the leveling component, reducing the impact of bends on the overall drill pipe, and improving the drag reduction and friction reduction effect.

This invention discloses a shale oil extraction method based on multi-stage pulsed gas fracturing and synergistic nanocatalysis, belonging to the field of oilfield development technology. The method includes the following steps: S1, determining the optimal drilling location of the target shale formation and conducting drilling operations; S2, using a high-frequency solenoid valve to control and generate an adjustable pulsed pressure wave of 0.1–10 Hz, injecting fracturing media mixed with functionalized nanoparticles into the formation via a fracturing pump, adjusting the pulse frequency of the high-frequency solenoid valve to perform staged pulsed fracturing operations, forming a fracture network; S3, after each stage of fracturing, injecting a mixture of proppant and fracturing fluid into the formation fractures; S4, after the fracturing operation is completed, applying a microwave field to the formation to maintain the formation temperature within a set range. This invention significantly reduces the environmental impact by using a mixture of gas fracturing media and functionalized nanoparticles for fracturing, and substantially improves the recovery rate of shale oil through the combined action of multi-stage pulsed fracturing, composite proppant, and microwave field.

Disclosed in the present invention are an oil extraction agent, and a preparation method therefor and the use thereof. On the basis of the total weight of the oil extraction agent, the oil extraction agent of the present invention comprises: 2-30 wt% of an acid-etched mineral, 3-60 wt% of a metal salt, and 0.1-20 wt% of an amine compound. The oil extraction agent of the present invention has a great number of characteristics, such as a high oil-gas conversion rate, low preparation costs, cleanliness, environmental friendliness, high stability and a long-lasting oil displacement effect. The oil extraction agent of the present invention is used in shale oil extraction, can effectively improve the oil-gas conversion rate (the oil-gas yield being increased by as much as 21.56%) of the in-situ conversion of oil shale, and has extremely high practical and economic values.

The present invention relates to the technical field of shale oil extraction, and specifically relates to a fully automatic online mixing device and mixing method for fracturing fluid powder, including: obtaining the target mixing parameter a with the highest priority from the mixing parameter set; the mixing device performs mixing work with a, and obtains the mother liquor uniformity change sequence A and the stability of a, adjusts the attention coefficient of a according to the stability, and re-obtains the target mixing parameter b from the mixing parameter set according to the adjusted attention coefficient; uses the PID algorithm to change the mixing parameter of the mixing device from a to b, and records the mother liquor uniformity change sequence B, adjusts the attention coefficient of b according to the difference between the mother liquor uniformity change sequences A and B, and the priorities of a and b; then deletes the mixing parameter with the smallest attention coefficient in the mixing parameter set, and the mixing device performs mixing work with b. The present invention improves the mixing efficiency when mixing the mother liquor of the fracturing fluid online, and prevents the occurrence of uneven situations such as fish eyes and sticky lumps.

The invention discloses an improved data processing method for an original microscopic wettability test of shale, and belongs to the field of oil-gas field development engineering.On the basis of an improved Amott method, nuclear magnetic signals are alternately shielded by two-phase fluid into heavy water shielding single-phase signals, and a representative oil sample is prepared according to a PVT report to replace fluorine oil of the improved Amott method; the fluid representativeness can be improved, and the original microscopic wettability of shale can be tested by representing an underground environment; meanwhile, in the aspect of data processing, a correction coefficient of a water / oil humidity index is introduced on the basis of a traditional Amott data processing method, saturation data correction which does not meet Amott assumption is realized, the influence of unmovable residual oil pores and dead pores during data processing is eliminated without cleaning a shale core in an experiment, and the microscopic wettability of the shale can be more accurately tested; and the method is crucial for improving the shale oil exploitation efficiency.

The invention discloses a maintenance cage for shale oil exploitation equipment, and belongs to the technical field of hoisting equipment, the maintenance cage comprises a hoisting assembly, the top of the hoisting assembly is slidably connected with a driving mechanism, and a corner regulation and control mechanism is further arranged between the driving mechanism and the hoisting assembly. According to the invention, under the mutual cooperation of the designed structures such as the corner regulation and control mechanism, the driving mechanism, the interlocking mechanism and the pitching regulation and control assembly, lateral deviation caused by non-uniform stress in the maintenance working process is avoided, the occupied space of the cage main body around the mining equipment can be effectively saved, and the hoisting cage has the advantages of simple structural form and compact structural size; the hanging basket is simple in structure, convenient to manufacture and assemble, safe, efficient, high in flexibility and suitable for overhauling work of mining equipment at different azimuth angles, a good protection effect can still be achieved when the working space condition is limited, and the supporting azimuth of the hanging basket body and the angle in the azimuth are further improved by controlling the pitching angle of the hanging basket body.

This invention discloses a multi-field coupled numerical simulation method for in-situ upgrading of shale oil at the pore scale, relating to the field of shale oil extraction technology. The system includes a model assumption module, a mathematical model module, a model solving and parameter setting module, and a result analysis module. Based on the above system, a multi-field coupled numerical simulation method for in-situ upgrading of medium- and low-maturity shale oil at the pore scale is further proposed. Through reasonable model assumptions and mathematical model construction, combined with effective numerical solution strategies and parameter settings, it can accurately simulate the multi-field coupling phenomena in the in-situ upgrading process of medium- and low-maturity shale oil. This invention considers the dynamic changes of various chemical components during the multi-stage pyrolysis of kerogen, as well as the interaction of chemical fields, temperature fields, and seepage fields, resulting in more accurate and reliable simulation results. Furthermore, through grid independence verification, a suitable grid partitioning scheme is selected, improving computational efficiency while ensuring computational accuracy.

The invention discloses a shale oil underground in-situ modification method and device, electronic equipment and a medium. The method comprises the steps that a power source anode and a power source cathode are installed in a shaft, the power source anode is connected with a high-voltage pulse power source through a cable, and the power source cathode is connected with a grounding position; the shale oil is exploited, so that the shale oil flows into the shaft; starting a high-voltage pulse power supply, and performing pulse liquid phase discharge on shale oil in the shaft through preset discharge voltage, preset discharge frequency and preset pulse width; and shale oil in the shaft is extracted, and the viscosity reduction rate and the recovery rate of the shale oil are determined. According to the technical scheme, pulse liquid phase discharge is used for shale oil underground in-situ modification, and the viscosity reduction rate and the recovery rate of shale oil can be remarkably increased.

The present invention relates to the technical field of the in-situ conversion of shale oil. Disclosed are an energy-enhancing oil-displacing agent, and a preparation method therefor and the use thereof. The oil-displacing agent comprises: an acid-etched mineral, an alcohol, metal ions and an acidified aqueous solution. On the basis of the total weight of the oil-displacing agent, the content of the acid-etched mineral is 1.0-22 wt%; the content of the alcohol is 0.4-10 wt%; and the content of the metal ions is 0.5-25 wt%. The oil-displacing agent of the present invention has a good oil-displacing effect, and can continuously promote the expulsion of generated oil and gas, thereby improving the oil expulsion volume and oil and gas production of shale oil extraction. Main raw materials used in the preparation method for an oil-displacing agent of the present invention comprise a natural mineral, an acid solution and an alcohol, and the preparation process involves a contact reaction; therefore, the costs are low, the preparation process is convenient, clean and environmentally friendly, and the preparation method is suitable for large-scale industrial production.

This invention discloses a method and apparatus for in-situ electric heating shale oil extraction using gas fracturing and alloy-assisted methods. It can be applied to oilfield development. The method includes: determining the target fracturing section; obtaining the formation temperature of the target well; determining the target alloy based on the formation temperature and a preset thermal conductivity standard; installing a heater in the target fracturing section; pumping molten target alloy along the heater into the fracture network structure; after the molten target alloy cools, controlling the heater to heat the target alloy; obtaining heating parameters and the formation thickness of the target well; calculating the temperature change within the target well based on the heating parameters and the formation thickness; and stopping the heater after the temperature at various points in the fracture network structure within the target well reaches a preset temperature, thus enabling oil and gas extraction in the target well. This invention can effectively increase the heat transfer range and efficiency of shale formations, achieving efficient heat transfer and economical shale oil extraction.

This application relates to the field of catalysts for in-situ oil shale extraction, and particularly to a catalyst for simultaneous hydrogen production during in-situ oil shale extraction and its preparation method. The preparation method includes the following steps: S1, preparation of a pretreated support: S101, preparation of an intercalated support; S102, oleophilic modification; S2, metal loading: S201, immersing the pretreated support obtained in S1 into a metal impregnation solution, stirring, and then concentrating under reduced pressure to obtain a metal-loaded support; S202, adding molybdenum disulfide and nickel phosphide to the metal-loaded support, adding a dispersant, and stirring to obtain a doped support; S203, aging the doped support in a sealed environment to obtain an aged support; S3, catalyst molding. This application provides a catalyst for simultaneous hydrogen production during in-situ oil shale extraction and its preparation method to solve the problems of low energy utilization efficiency and the inability to simultaneously achieve shale oil extraction and hydrogen production in related technologies.