177 results about "Water development" patented technology

The invention discloses an automatic circulation separate zone periodical water injection method of a water injection well. More than two automatic circulation switchers are arranged in a water injection string and in a way of corresponding to each oil layer; in each automatic circulation switcher, a motor for opening or closing an eccentric water distribution valve is connected with a micro processor; the micro processors of the automatic circulation switchers are configured with opening and closing programs respectively; and the automatic circulation switchers automatically and alternately open and close according to a set time sequence to inject water into each oil layer circularly to realize periodical pulse water injection to underground oil layers. The method is simple in operation, reliable in operation and high in success rate, avoids manual control and a manual control factor, which causes errors easily, and improves water injection development effect.

The invention discloses a method for water-flooding abandoned condensate gas reservoirs. The method includes performing full fluid PVT (pressure-volume-temperature) analysis first to complete long-core displacement experimental analysis. The long-core displacement experiment mainly includes the steps: selecting core samples on site; testing basic physical-property parameters of cores; splicing the core samples into a long core for displacement experiment, performing natural energy failure experiment, performing displacement in flooding, acquiring recovery rate of water-displacing condensate oil and condensate gas under different conditions according to the experiments, and comparing to determine the waterflood pattern which is most satisfactory to the requirement of increasing recovery rate of condensate gas reservoirs on site; and compiling a condensate gas reservoir water-flooding scheme according to indoor experiment results. The problem that existing depletion development of condensate oil-gas reservoirs is fast in energy decline, causes underground condensate oil loss and is low in production level is solved. Reasonable water-flooding speeds and water-flooding modes are optimally selected by the method and used for water flooding of abandoned condensate gas reservoirs, so that recovery rate of condensate oil-gas reservoirs is effectively increased.

The invention discloses a method for modeling a predictable physical model for fractured anisotropic oil reservoir water flooding development, and the method comprises the following steps: (a) establishing similarity criteria for simulating the fractured oil reservoir development according to characteristics of the process of fractured oil reservoir water flooding oil development and by utilizing theories of seepage mechanics and similarity analysis, wherein the similarity criteria comprise similarities in shape and space, shaft geometry, physical properties of rock, oil-water viscosity, gravity-pressure, matrix and fracture movable oil amount ratio, oil content distribution in matrix, matrix imbibition and fracture displacement characteristic time, imbibition intensity distribution and time process; (b) realizing the similarity criteria and a design method of model parameters; and (c) modeling an oil reservoir macroscopic physical model which meets the multiple similarities so as to comprehensively simulate and predict seepage characteristics and the development process of real fractured oil reservoir. A predictable physical simulation similarity criterion system for the fractured anisotropic oil reservoir is established, has comprehensive functions and is easy to realize.

The invention provides a calculating the plane heterogeneous decision coefficient and the longwise heterogeneous decision coefficient according to the flooding pressure loss curve, absorbing cross section, oil water well corresponding relation, oil water well production month data and drill electric side explanation data, and then: (1) determines the connection relation of the oil water well, namely the primary flow direction of the water in flooding well and the primary water supplying source of the producing well; (2) judges the necessity of block allotment; (3) selects the well needed to be allotted; (4) determines the blocking agent compound and the setting mode; (5) determines the allotting mode; (6) determines the dose of the blocking agent; (7) estimates the allotting effect.

Disclosed is an emulsified asphalt profile control agent. The emulsified asphalt profile control agent is applied to adjustment of injection profiles of water injection wells in the water injection development process of oil fields. The water drive wave and efficiency are improved. The emulsified asphalt profile control agent comprises, by weight, 45-65% of asphalt, 0.3-1.2% of dodecyl diphenyl ether sodium disulfonate, 0.3-1.2% of sodium alcohol ether sulphate, 0.05-0.1% of polyoxyethylene fatty acid, 0.02-0.8% of phenethyl phenyl polyoxypropylated polyoxyethylene ether, 0.3-1.5% of sodium pyrophosphate, 0.02-0.1% of ultra-fine calcium powder, 0.02-0.08% of carboxymethyl cellulose, 0.02-0.08% of anionic polyacrylamide, 0.000004-0.04% of sodium hydroxide and the balance fresh water of which the salinity is less than 1,000mg / L. The emulsified asphalt profile control agent has the advantages that the emulsified asphalt profile control agent can enter deep portions of oil reservoirs effectively, the water plugging rate is more than 90% under the condition that the injection capacity accounts for 1-15% of the reservoir preprocessing radius hole volume, the validity period of the water plugging is more than 2 years and oil flow channels are not damaged.

In the method wherein a resist pattern is miniaturized effectively by applying a fine pattern forming material, the fine pattern forming material used for providing with a cured coated layer pattern, wherein development defects are reduced by water development is offered, wherein the fine pattern forming material comprises a water-soluble resin, a water-soluble crosslinking agent and water or a mixed solution consisting of water and a water-soluble organic solvent, and further comprises an amine compound.

In the method wherein a resist pattern is miniaturized effectively by applying a fine pattern forming material, the fine pattern forming material used for providing with a cured coated layer pattern, wherein development defects are reduced by water development is offered, wherein the fine pattern forming material comprises a water-soluble resin, a water-soluble crosslinking agent and water or a mixed solution consisting of water and a water-soluble organic solvent, and further comprises an amine compound.

A process for producing a water-developable printing plate for use in relief printing, comprising subjecting a solid plate made of a photosensitive resin composition including at least (a) a hydrophilic resin, (b) a hydrophobic resin, (c) a photopolymerizable unsaturated compound and (d) a photopolymerization initiator to at least an exposure step with actinic light, a development step and a post-exposure step, wherein the above described post-exposure step is carried out in a low oxygen concentration environment.

The invention relates to a tunnel construction method for crossing a karst water-rich section. The method is characterized by comprising the following steps of: step 1, when the tunnel construction isclose to the karst water-rich section, predicting the underground water development condition and stratum information by adopting an advanced geological prediction method; step 2, drilling a water detecting hole by adopting advanced horizontal hole drilling, and detecting the water inrush position, the water inrush amount and the water inrush pressure of the karst water-rich section through the water detecting hole; step 3, digging a tunnel face leading guide pit in the contour line of a tunnel according to the predicted water inrush position for drainage and pressure reduction, wherein the water inrush position is located on the side wall of the leading guide pit; step 4, grouting by adopting an advanced small conduit, carrying out advanced support on the tunnel to form a grouting ring for water isolation, and preventing underground water from flowing into surrounding rock in front of a tunnel face; and 5, excavating a tunnel body, plugging the water detecting hole, and excavating the tunnel body by controlled blasting. According to the tunnel construction method, the risk of water inrush on the tunnel face can be effectively reduced, and the tunnel construction safety is guaranteed.

The invention discloses an environment-friendly crosslinking and gelling retarding profile control agent and a preparation method thereof and belongs to the field of enhanced oil recovery technologies for oilfields. The profile control agent comprises a primary agent, i.e. hydrophobic association, a crosslinking agent, i.e. aluminum citrate, an antioxidant, i.e. sodium sulfite, and a retarding agent, i.e. sodium malate, and contains all the ingredients in percentage by weight: 0.1-0.4% of hydrophobic association, 0.01-0.02% of aluminum citrate, 0.015-0.025% of sodium sulfite, 0.005-0.020% of sodium malate and the balance of water. The profile control agent disclosed by the invention has the characteristics that the profile control agent is environment-friendly and is free of damage / injury to environments / human bodies; the crosslinking is retarded, and the gelling time is prolonged, thereby being beneficial to high-dose injection and deep profile control; the plugging rate is high; and the profile control agent has certain temperature-resistant and salt-tolerant performance and scouring resistance. The profile control agent can be used for adjusting a water absorption profile of a water-flood well and improving the water-flood development effect of oilfields.

The invention provides a method for improving the condensate oil recovery ratio through injecting water into a fracture-cave type carbonate condensate gas reservoir. The method comprises the following steps of: (1) reservoir type identification; (2) retrograde condensation and oil ring judgment; (3) study on the underground occurrence state of retrograde condensation oil; (4) indoor physical experiment analysis and study; (5) trial injection; (6) water injection; (7) well soaking; and (8) oil production. The method has the advantages that the technical storage and the favorable support are provided for the recovery ratio improvement through water injection development of the fracture-cave type carbonate condensate gas reservoir, and the recovery ratio is greatly improved.

A method for establishing a physical model capable of predicting waterflooding of fractured anisotropic oil reservoirs comprises the following steps: (a) establishing the similarity criterion for development simulation of fractured oil reservoirs by utilizing the seepage mechanics theory and similarity analysis according to the characteristics of waterflooding processes of the fractured oil reservoirs, wherein the similarity criterion includes similarity of appearance to space, wellbore geometry similarity, petrophysical character similarity, oil / water viscosity similarity, gravity-pressure similarity, similarity of matrix to movable oil ratio in fractures, similarity of oil content distribution in the matrix, similarity of matrix imbibition to fracture displacement characteristic time, similarity of imbibition strength distribution and similarity of time process; (b) realizing the similarity criterion and designing the model parameters; and (c) establishing the macroscopic oil reservoir physical model satisfying multiple similarity so as to comprehensively simulate and predict the seepage characteristics and development processes of the practical fractured oil reservoirs. In the invention, a physical simulation similarity criterion system capable of predicting the fractured anisotropic oil reservoirs is established, which has comprehensive functions and is easy to realize.

The invention relates to a horizontal well dragging type liquid producing section testing tubular column which comprises an oil pipe and a sleeve. The oil pipe is located in the sleeve. The oil pipe and the sleeve pipe each comprise a horizontal segment and a vertical segment. The horizontal segment of the oil pipe is sequentially provided with a guide plug, a hole pipe, a producing section tester, a first communicating pipe and a second communicating pipe from the toe portion to the heel portion, and an oil well pump is arranged in the vertical segment of the oil pipe. The producing section tester is connected with a cable, and the cable is connected to well mouth equipment through a three-way guide pipe arranged at the bottom of the oil well pump in the vertical segment of the oil pipe. The horizontal segment of the sleeve is provided with a plurality of perforation segments. According to the testing tubular column, the producing section tester is pre-arranged in the oil pipe, the cable is dragged in the oil pipe to drive the producing section tester in the testing period to test the liquid producing amount and water content of different combined layer segments, the ground does not need to be manually measured, the cable transmits data in real time, the liquid producing amount and water content condition of each layer segment are analyzed in real time, liquid producing information of each producing layer segment of a horizontal well is known in time, and bases are provided for water-flooding development adjusting and later water plugging of the horizontal well.

The invention discloses a preparation method of a three-dimensional oil reservoir water-displacement simulation model and a real-time dynamic monitoring visualization device, and relates to the fieldof oilfield water-injection development experiments. According to the digital research result of an oil reservoir and the actual demand, a 3D printing technology is utilized to print a sand-filling model frame, an oil reservoir bottom face and an oil reservoir fault frame, sand with different grain sizes are used for filling, impermeable plastic films are used for replacing a partition layer and interlayer, plastic pipes are used for simulating oil production wells and water injection wells, thus a constructed three-dimensional real oil reservoir miniature model is used for a displacement experiment, and the oil and water motion states in the water injection experiment process under different well network conditions are simulated; and then resistivity measuring instruments are buried intothe three-dimensional oil reservoir water-displacement simulation model, oil and water dynamic visualization is achieved through resistivity values at different positions and in different time, the residual oil distribution law is determined, and the basis is provided for programming of a development scheme, potential tapping of residual oil and implementing of yield-increasing measures.

The invention discloses a local well pattern water injection development optimization method based on a graph neural network. The method specifically comprises the steps as follows: (1) obtaining geometrical information of a local target well pattern, and constructing a graph neural network structure of an injection-production well pattern according to the topological structure characteristics ofa water injection well and an oil production well; (2) acquiring historical production data of a target well pattern; (3) training the graph neural network structure in the step (1) by utilizing the historical production data in the step (2), and establishing a graph neural network model; and (4) performing sensitivity analysis on the parameters of the injection-production well pattern by utilizing the graph neural network model to obtain sensitivity factors in the injection-production well pattern. According to the method, the basis for adjusting the water injection amount is provided for water injection development, the oil production amount is predicted, meanwhile, the importance of different wells and different static parameters in each well pattern is given, and main influence wells and secondary influence well points are distinguished when the water injection amount is adjusted.

The invention relates to a preparation method of a healthy wine, and in particular relates to a preparation method of a tartary buckwheat wine with a function of reducing blood fat. The preparation method comprises the following steps of: 1, extracting a tartary buckwheat extracting solution; 2, carrying out vacuum concentration on the tartary buckwheat extracting solution; 3, separating the concentrated solution by an activated resin column; 4, top-washing the resin column by using pure water until effluent becomes clear from muddy; 5, eluting the resin column by using 40-65% alcohol, detecting an eluent by using an ammonia water development process, when test paper becomes yellow from colorless and then changes into colorless, stopping eluting, and collecting the eluent; 6, carrying out vacuum concentration on the eluent for recovering alcohol, vacuum-drying to obtain a dry extract with the flavonoid content of 40-85 percent; and 7, selecting white wine with an alcoholic strength of 25-68%vol, adding the dry extract, fully uniformly stirring, standing for 24-48h, and filtering to obtain the tartary buckwheat wine. The tartary buckwheat wine prepared by adopting the preparation method has the flavonoid content being not less than 100mg / L, is safe and nontoxic, and has the effect of assisting the reduction of the blood fat.

The invention discloses a water-developable chemistry-free thermosensitive board and a preparation method thereof. The water-developable chemistry-free thermosensitive board is environment-friendly, and by the water-developable chemistry-free thermosensitive board, cationic cross linking and free radical polymerization can be generated simultaneously. The technical problem that the water-developable capability and the pressing resistance of a chemistry-free thermosensitive CTP (computer-to-plate) board in the prior art is solved. The water-developable chemistry-free thermosensitive board comprises a supporting body, a thermosensitive layer and a protecting layer; and the thermosensitive layer comprises the following raw materials in part by weight: 30-70 parts of water-soluble thermo-crosslinking copolymers, 10-50 parts of performed polymers containing hydrophilic radicals, 10-30 parts of polyfunctional monomers, 1-20 parts of cationic initiators and 1-20 parts of infrared radiation absorption dyes. By the technical scheme, water development can be carried out directly after infrared laser scanning imaging is performed, imaging contrast is high, boards can be detected before being machined, and printing resistance is high.

The invention relates to a method for realizing dynamic flowing unit division of a floodable development reservoir in an extra-high-water-cut stage. The method comprises the following steps of step (1) according to the existing relative permeability curve of an oil field, performing regression to obtain a relative permeability curve expression under the condition of different absolute permeabilities; and further performing calculation to obtain the water phase relative permeability of each mesh point; step (2) calculating a water phase seepage flow coefficient: performing calculation to obtainthe water phase seepage flow coefficient of each mesh point in a model by using the water phase relative permeability of each mesh point obtained in the step (1) according to the definition of the seepage flow coefficient; step (3) determining a division limit; drawing a water phase water phase seepage flow coefficient semi-log accumulation curve graph; finding two parallel sections (with small slopes which are almost zero) and one section with the larger slope in the two parallel sections to be used as the division limit of the dynamic flowing units; and step (4) judging the affiliated region of the mesh; on the basis of the division limit in the step (3), performing region judgment on the water phase seepage flow coefficient of each mesh; and further dividing the flowing units.

The invention provides a polymer emulsion containing infrared absorption dye and a preparation method thereof, and particularly relates to a free radical polymerization method for preparing a photosensitive material containing infrared absorption dye thermosensitive emulsion. The polymer emulsion contains the following components by weight percentage: (1) 1-10% of an infrared absorption dye; (2) 10-40% of nanometer polymer microspheres; (3) 1-10% of an emulsifier; (4) 0.1-2% of an assistant emulsifier; and (5) 50-90% of deionized water. The polymer emulsion prepared by the method provided by the invention can be used for preparing a precursor of a coating liquid absorbing near-infrared light with wavelength of 700-1100 nm; the emulsion subjected to coating and drying can enable polymer to generate physical and chemical changes from the inside under effect of near infrared laser with wavelength at 700-1100 nm, leading to thermotropic phase change of the macro structure, and imaging can be generated after water development; the emulsion can be stably stored for a long time; and polymer coating effectively stabilizes the infrared absorption dye.

The invention provides an intelligent underground layered well test injection allocator and a flow automatic control and test system, belonging to the technical field of water flooding development ofan oil field; a water inlet of a self-control water nozzle is connected with an overflowing pipe; one end of a water outlet of the self-control water nozzle extends in an upper joint and is connectedwith the outside of the upper joint by the upper joint; a flowmeter is arranged between the water inlet and the water outlet; a well test short joint capable of monitoring and obtaining the external pressure of the upper joint and calculating and obtaining the needed flow of the water nozzle is connected with the upper joint; a control storage module for obtaining the data of the well test short joint and controlling the aperture of the self-control water nozzle and a cell unit are connected with a lower joint; and the control storage module is respectively and electrically connected with thecell unit, the flowmeter, the well test short joint and the self-control water nozzle.

The invention discloses a water injection growth crack numerical simulation method and device for an embedded discrete crack. The method comprises the steps that a kinetic model of crack initiation, extension and closing tendency is established based on geological parameters and engineering parameters through employing kinetic theoretical analysis; and iterative coupling is performed on the kinetic model of crack initiation, extension and closing tendency and an oil reservoir numerical simulation program with an EDFM crack modeling function, and the evolution process of crack initiation, extension and closing tendency of a water injection growth crack is simulated. The invention relates to an oil reservoir numerical simulation method capable of simulating and predicting the growth process(including the extension direction and the geometrical morphology) of dynamic fractures in real time. Dynamic extension of the water injection growth crack can be predicted and visually observed, so that an oil reservoir engineer is helped to formulate countermeasures such as pressure-limiting water injection, blockage removal and profile control, repeated fracturing and lateral matrix oil displacement, dynamic cracks are effectively prevented and controlled, an effective displacement system is established between injection and production wells, and the optimal water injection development effect is achieved.

The invention belongs to the technical field of water injection well acidizing in downhole operation engineering of the field of oil field water injection exploitation and particularly relates to a scale removal and prevention online acidizing method for a water injection well. The scale removal and prevention online acidizing method comprises the following construction steps that in construction,a wellhead of the water injection well is closed, an inlet of injection equipment is connected with an acid tank, and an outlet of the injection equipment is connected with the wellhead of the waterinjection well; acid in the acid tank and water are mixed into a mixing solution, the wellhead of the water injection well is opened, and the mixing solution is injected into a shaft of the water injection well through the injection equipment; scale removal and prevention liquid is injected into the shaft of the water injection well through the injection equipment; and the wellhead of the water injection well is closed, the injection equipment is detached, and then, the wellhead of the water injection well is opened for recovering normal water injection. The defects of long construction period, large labor intensity, complicated construction process and the like of the construction process in conventional acidizing construction are overcome; the generating number of scale in a stratum is decreased, the acidizing operation effect is optimized, and the effective acidizing time is prolonged; and meanwhile the construction process is reduced, the labor intensity is reduced, and the construction efficiency is improved greatly.

An organic electroluminescence device manufacturing method is disclosed wherein the device comprises a substrate, a first and second electrode, and an organic luminous layer. The method comprising: hardening of a water development type photosensitive resin to form a plastic plate; and printing organic luminescent ink on a substrate by relief printing method with the use of the plastic plate, wherein the organic luminescent ink is an ink capable of scattering organic luminescent material in an organic solvent.

The invention discloses a new polymer blue-ray engraving material, which consists of aqueous solution of modified SBQ (special bar quality) resin, epoxy resin, a curing agent, a photo polymerization initiator and the like. Organosilicon modified polyurethane is adopted to generate synergy with a colloid, and the acid and alkali resistance of a film is improved; and vinyl acetate and acrylate copolymer is introduced and is coordinated with long-chain ester monomers, multi-functional active monomers and modified polyurethane to form an interpenetrating network / semi-interpenetrating network, so that the mechanical properties of the film are obviously improved, the chemical resistance and mechanical wear resistance of photoresists are improved and the adhesion of the photoresists to a base material is improved. Without action of chromium ions, the new polymer blue-ray engraving material has high photosensitivity to blue-ray laser dotting instant exposure, good cross-linking curing performance, and the water development fastness meeting the engraving requirement, has good printing fastness after high-temperature curing, and has good application prospect.

The invention relates to a photosensitive water-developable resistance welding composition composed of phthalic anhydride half-ester modified formaldehyde epoxy acrylate, phenyl triphenol diacrylate, anhydride half-ester, novolac epoxy resin sebacic monoester, a photoinitiator, a coloring agent, a plasticizer, inorganic filler, a leveling defoamer, a coupling agent, an emulsifying agent, a polymerization inhibitor and the balance of water. The phthalic anhydride half-ester modified formaldehyde epoxy acrylate can provide water solubility, water development property, good film forming property and contact drying property, so that the photosensitive water-developable resistance welding composition has higher adhesion force when applied to the preparation of a printed circuit board resistance welding diagram. The invention also provides a photosensitive water-developable resistance welding dry film prepared by using the photosensitive water-developable resistance welding composition.

The invention provides a sand filling tube combination device for simulating a fractured reservoir. The sand filling tube combination device comprises a sand filling tube which is formed by sealing at least one section of cylindrical barrel and flange plates at the two ends of the cylindrical barrel; outer interfaces are formed at the circle center positions of the flange plates at the two ends; the outer interfaces are connected with connecting pipes through connecting elements in a sealed way; the cylindrical barrel or the connecting pipes at the two ends of the flange plates of the sand filling tube are connected with one or more capillary tubes through diameter-variable joints. By the sand filling tube combination device for simulating the fractured reservoir, fractures in different sizes are simulated by the capillary tubes with different diameters, the stratum conditions of the fractured reservoir can be simulated very well, and the fractures at the positions different from the position of a water injection wellhead can be simulated by setting the positions of the capillary tubes; in the water injection development process of a natural fractured reservoir, the sand filing tube combination device has important guiding significance to determine a reasonable water injection mode and a reasonable water injection pressure and delay directional water channeling and flooding speed of an oil well.

The invention discloses a single-component water-emulsion type rotary screen stenciling sensitive material which comprises the following raw materials by weight percent: 20-45 percent of modified SBQ resin water solution, 10-30 percent of crylic acid modified epoxy resin, 0.5-4 percent of hyperbranched polyester resin, 2-5 percent of polyvinyl unsaturated compound, 2-4 percent of blocked isocyanate compound, 1-2 percent of photopolymerization initiator, 0.001-0.5 percent of antioxidant and stabilizing agent as well as 15-60 percent of water. The invention has the advantages that in the using process, no toxic and harmful gases and no heavy metal ion waste liquid are discharged; matters, such as bichromate, and the like are not adopted as photosensitizer, any matters are unnecessary to be added before use, and the water development firmness of the material can satisfy the requirements of fine patterns; residues after being used can be also recycled, and the material has good waterproofness, high chemical abrasion resistance and wide using prospect; the hyperbranched polyester resin is adopted as heat curing agent of epoxy resin, and the invention is successfully applied to light-sensitive stenciling material.

The invention provides an injection increasing method for water-injection development of an oil reservoir. The injection increasing method comprises the following steps that (1) according to the reservoir characteristics of to-be-killed wells, a fracturing technology is optimized; (2) water source water samples and resistance reducing agents nearby a to-be-killed well field are taken for compatibility performance test, and if compatibility performance is good, a mixed solution of anti-swelling agents, the resistance reducing agents and the water source water samples is subjected to a core damage experiment and an anti-swelling performance experiment; (3) according to the well set deficit amount, the injected liquid amount is optimized; (4) the expected construction pressure is calculated,and the liquid inlet mode is selected; (5) on-site construction is conducted, adjacent wells in the same well set are all shut in, and a pressure gauge is mounted; and (6) according to the well set pressure change, the water sample analysis result and / or the core test result, the well shut-in time is determined, and the oil well opening sequence is optimized. According to the injection increasingmethod for water-injection development of the oil reservoir, fracturing and energy-increasing water injection are combined so that the problems that an existing low-permeability oil reservoir is poorin water-injection effect, consequently, formation energy cannot be effectively supplemented in time, and the oil well yield is lowered rapidly can be effectively solved.

The invention provides a method for developing hot dry rock geothermal resources through using a gravity drainage technology. The method comprises the three steps of injection-production well design and well drilling, inter-well fracturing communication and high-pressure water injection production. In the well drilling stage, vertical fracturing and longitudinal communication are carried out on anupper horizontal well and a lower horizontal well which are parallel to each other, so that the upper injection-production horizontal well and the lower injection-production horizontal well meet therequirements of flow communication and pressure communication; in the production stage, low-temperature water is injected into an upper injection well and then subjected to sufficient heat exchange with a stratum, so that high-temperature water is extracted from a lower production well, extracted heat energy is comprehensively utilized for power generation and the like, and the treated water is circularly injected back into a dry hot rock stratum. According to the technical scheme, the gravity settling principle and a method for improving the heat exchange efficiency through crack auxiliary fluid flowing are combined, and the development efficiency of the hot dry rock geothermal resources can be greatly improved.