50 results about "Reservoir (environment)" patented technology

The invention relates to the technical field of micro-nano motors, in particular to a preparation method and application of a micro-nano motor for improving oil reservoir exploitation. Due to the wheel shape of the micro-nano motor and the hydrophobic modification effect, the micro-nano motor can move in a high-viscosity oil reservoir environment in oil reservoir exploitation. Under the action of a magnetic field, the micro-nano motor can controllably move in a complex three-dimensional core environment, and the size of the micro-nano motor can be reduced when the micro-nano motor encounters a narrower pore throat, so that the micro-nano motor can smoothly pass through the pore throat. When the micro-nano motor makes contact with crude oil drops, the micro-nano motor can carry the oil drops to move and carry the oil drops to a high-permeability area of the oil reservoir, and the motor carrying the oil drops is extracted to the ground along with displacement fluid, so that the recovery rate of the oil reservoir is increased. Meanwhile, the micro-nano motor can be recycled for multiple times.

The invention relates to the technical field of computer simulation, and discloses a coal mine underground reservoir environment risk assessment method and system, and the method comprises the steps: constructing a digital twinborn body of a coal mine underground reservoir; establishing a risk assessment index system; collecting monitoring data corresponding to the index system in real time; calculating risk coupling factors among different dimension indexes; according to the risk coupling factor and the real-time numerical value of each index, dynamically adjusting the weight of the index system, and generating a dynamic weight set; calculating a current comprehensive risk level; and extracting physical field parameter values in the real-time monitoring data, inputting the physical field parameter values into a multi-physical field coupling simulation engine for simulation, and outputting a prediction report. According to the invention, dynamic assessment and advanced early warning of the environmental risk of the coal mine underground reservoir can be realized, the risk identification precision and the emergency response capability are improved, and the method is suitable for safety management and control of the whole life cycle of the underground reservoir under complex geological conditions.

The invention discloses a device for testing the penetration depth of wellbore fluid into a reservoir. The device mainly solves the problem that data obtained by a testing technology and method in the prior art cannot truly and effectively reflect the actual well bottom working condition. The device comprises a double-core holder, a formation pressure simulation mechanism, a formation temperature simulation mechanism, a liquid circulation mechanism and a flow measurement mechanism which are respectively connected with the double-core holder through pipelines, and a data processing mechanism for receiving and processing data information in the double-core holder. By means of the scheme, the working conditions and reservoir environments under different construction operation conditions in the oil-gas exploration and development process can be simulated, and the depth of shaft liquid invading the reservoir is continuously measured through microwaves; the method provides a basis for optimization of wellbore fluid performance and system optimization, and selection and design of engineering processes such as drilling parameters, well completion modes, reservoir transformation technologies, reservoir protection technologies and the like, and has high practical value and popularization value.

The invention relates to the technical field of reservoir safety monitoring and early warning, in particular to a reservoir operation state prediction analysis method based on environmental data. The method comprises the following steps: collecting original resistance response sequences of reservoir bottom mud at different depths by adopting low-frequency alternating-current signals through a laid vertical resistivity probe array; performing polarization effect compensation processing on the original resistance response sequence to obtain a sediment resistivity layer spectrogram; collecting reservoir environment data; performing time sequence coupling analysis on the reservoir environment data and the sediment resistivity layer spectrogram to obtain a sediment stability influence factor spectrum; constructing a bottom mud layered structure model according to the bottom mud resistivity layer spectrogram and the bottom mud stability influence factor spectrum; and carrying out basic stress field calculation on the bottom mud layered structure model to obtain an initial stress distribution diagram. Through a full-chain technical route from sediment internal monitoring to multi-factor comprehensive analysis, the early warning timeliness, accuracy and reliability of reservoir sediment disasters are remarkably improved.

The invention provides a reservoir environment monitoring method and system, and belongs to the field of reservoir water quality monitoring. The method comprises the following steps: acquiring vertical temperature time sequence data and a plurality of layered fluctuation coefficients under a plurality of depth intervals; setting a water quality sensor monitoring frequency, and obtaining a first water quality parameter of the first depth interval; configuring a prediction resource based on the first layered fluctuation coefficient, predicting a water quality parameter of a second depth interval according to the first water quality parameter and the first layered fluctuation coefficient, and verifying to obtain a prediction error coefficient; and performing layer-by-layer prediction according to the prediction error coefficient and the layered fluctuation coefficient until the water quality parameter of the target depth and the reservoir environment monitoring result are obtained. The technical problems of inaccurate target depth water quality monitoring and high cost caused by the fact that a water quality sensor cannot realize full-depth coverage in the prior art are solved, and the technical effects of accurately monitoring the target depth water quality and reducing the deployment cost of the sensor are achieved through temperature stratified fluctuation analysis and layer-by-layer prediction error compensation.

The embodiment of the invention relates to the technical field of oil exploration and development, in particular to a shale reservoir compressibility calculation method, device and equipment, and the method comprises the steps: obtaining a rock sample of a shale reservoir on a construction site; calculating the bedding development index of the rock sample; the bedding development index represents the bedding structure development degree of the rock sample; performing a triaxial compression experiment on the rock sample under the simulated shale reservoir environment to obtain a brittleness index of the rock sample; the brittleness index represents the strain degree of brittle fracture of the rock sample; scanning the rock sample after the triaxial compression experiment to obtain a fractal dimension index of the rock sample; the fractal dimension index represents the space structure complexity of the three-dimensional crack in the rock sample; and calculating the compressibility of the shale reservoir according to the bedding development index, the brittleness index and the fractal dimension index. According to the embodiment of the invention, the compressibility of the shale reservoir can be accurately and quickly evaluated on the construction site by integrating the bedding structure development degree, the fracture strain degree and the space structure complexity of the rock sample.

The invention belongs to the field of shale oil reservoir development in the oil and gas reservoir development technology, and discloses a pressure-braising-seepage-drainage integrated experimental device and method for shale reservoir actual temperature and pressure conditions, and the device comprises a power system, a fluid supply system, a reservoir simulation system, a temperature control system and an electronic metering system; the power system is used for providing pressure for the fluid supply system; the fluid supply system is used for supplying fluid to the reservoir simulation system, and the fluid is oil in the oil saturation process or fracturing fluid in the displacement process; the reservoir simulation system is used for simulating the fracturing-soaking-imbibition-flowback integrated process of the target shale oil reservoir under the actual temperature and pressure conditions; the temperature control system is used for simulating the actual temperature of the shale reservoir; and the electronic metering system is used for measuring the oil saturation in the produced liquid. The device is resistant to high temperature and high pressure, can simulate the ultrahigh-temperature and high-pressure actual oil reservoir environment of a shale reservoir, and can realize the fracturing-soaking-imbibition-flowback integrated process considering the actual formation pressure of shale.

The invention relates to an ultrahigh-temperature and high-salinity water shutoff system and a preparation method and application thereof, and belongs to the field of oilfield water shutoff systems, and the ultrahigh-temperature and high-salinity water shutoff system comprises the following substances in parts by weight: 8-10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 6-10 parts of N-vinyl caprolactam, 6-8 parts of N-isopropylacrylamide and 4-6 parts of monostearyl maleate. The invention relates to a water-based adhesive which is prepared from the following components in parts by weight: 6 to 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 to 5 parts of dimethylaminoethyl methacrylate, 0.2 to 0.4 part of dimethyl 2-butenedioate trimethylolpropane triacrylate, 3 to 5 parts of modified nanoscale silicon dioxide, 2 to 4 parts of modified nanoscale calcium carbonate and 100 to 120 parts of deionized water. The plugging agent provided by the invention can still maintain good plugging performance in an oil reservoir environment in which the underground temperature of an oil field exceeds 120 DEG C and / or the degree of mineralization is higher than 100000mg / L, so that the plugging efficiency of a water seepage layer of an oil well in the oil field is ensured.

The application discloses a simulation device and method for improving the producing degree of a tight reservoir by using inter-fracture displacement and well sealing. The experimental device comprises a temperature and pressure loading module, a first core monitoring module, an automatic control module, a second core monitoring module, a liquid injection module and an inter-fracture displacement simulation module. The experimental method comprises a preparation step before the experiment, a data measurement step, and a real-time control step of the automatic control module, wherein the data measurement step comprises a reservoir environment simulation step, a liquid injection step, a well sealing and displacement step, and a data collection step. The experimental device and method consider actual factors such as the temperature and pressure environment of the reservoir, the flow rate of the fracturing fluid and the well sealing time, can realize the monitoring of the oil displacement amount and the semi-quantitative characterization of the fracturing fluid sweep efficiency, and thus provide a certain basis for the fracturing construction design of an oilfield.

The utility model discloses a rock core experiment device for simulating oil reservoir environment, which comprises an oil reservoir simulation device, the oil reservoir simulation device comprises a rock core cabin body, a rock core cabin opening is arranged on the top wall of the rock core cabin body, the rock core cabin body is connected with a pressure regulating device, and a rock core base is arranged on the bottom wall in the rock core cabin body. And the core base is in the projection of the core cabin opening. The oil reservoir simulation device can provide temperature, pressure and formation fluid, simulate the real consolidation condition and performance characteristics of the artificial rock core in the formation environment, truly reflect the characteristics of the artificial rock core in the formation environment, provide more real experimental data for sand prevention design, preferably select better products, and improve the production efficiency. The sand prevention effect of chemical sand prevention is improved, and the sand prevention validity period is prolonged.

The present invention relates to the technical field of dredging management, and in particular to a method and system for the three-dimensional modular design and construction of a dredging vessel. The method comprises the following steps: acquiring multi-source lake and reservoir data, and performing three-dimensional environmental data modeling to obtain a three-dimensional data model of the lake and reservoir environment; optimizing the hull structure topology based on the three-dimensional data model of the lake and reservoir environment, thereby obtaining modular hull structure design data; acquiring hull sensor data and performing sensor data fusion to obtain a lake and reservoir environment sensor network; optimizing the coordinated control of the pump group through the lake and reservoir environment sensor network to obtain optimal pump group control parameter data; dynamically optimizing the actual dredging construction parameters of the dredging vessel based on the lake and reservoir environment sensor network and the modular hull structure design data to obtain dynamic construction parameter data; integrating the hull module transportation strategy based on the lake and reservoir environment sensor network to obtain the hull module transportation strategy. The present invention can improve the dredging efficiency of dredging vessels.

A copolymer, a preparation method therefor, and a use thereof. The copolymer contains an olefin backbone, and a sulfonic acid group, an acylamino group, an aminoacyl group, and a tertiary carbonate group, which are bonded to the olefin backbone. By means of a synergistic effect of these functional groups, the hydrolysis rates of the acylamino group and the aminoacyl group can be controlled, and precipitation is inhibited, thereby finally achieving a high hydrolysis rate. The copolymer can be used for profile control and flooding of a high-temperature high-salinity oil reservoir, especially a carbonate rock oil reservoir. The copolymer can be slowly hydrolyzed to release cross-linking sites in the oil reservoir environment, and the cross-linking sites released by hydrolysis can bind with a cross-linking agent to form a profile control and flooding system. After injection into the oil reservoir, initial low viscosity is achieved, and during migration, cross-linking groups are continuously released by means of slow hydrolysis, thereby achieving stepwise tackifying; in addition, the profile control and flooding system maintains certain viscosity and strength, so that deep profile control and flooding, flow channel adjustment, and long-lasting plugging are achieved.

The invention relates to the technical field of petroleum, in particular to a permeability level difference lower limit determination method, device and equipment. The permeability level difference lower limit determination method comprises the following steps: calculating a permeability level difference set of a target oil reservoir according to target oil reservoir data; the permeability grade difference set corresponds to a plurality of groups of rock cores; any group of rock cores in the plurality of groups of rock cores comprises a first rock core and a second rock core; the permeability of the first core is greater than that of the second core; obtaining the recovery degree of crude oil of the multiple groups of cores in the simulated target oil reservoir environment; and according to the crude oil recovery degree of the multiple groups of cores in the simulated target oil reservoir environment, determining the permeability grade difference lower limit of the target oil reservoir in the permeability grade difference set. According to the embodiment of the invention, the influence of the permeability level difference on the oil displacement effect of the target oil reservoir and the permeability level difference lower limit of the target oil reservoir can be determined under the simulated target oil reservoir environment, and the design of a heterogeneous oil reservoir development scheme can be guided, so that the heterogeneous oil reservoir can be developed more efficiently.

This invention relates to a knowledge graph-driven intelligent molecular design method for oil displacement agents. It involves integrating multi-source heterogeneous data from experiments, literature, and oilfield sites. Through cleaning, standardization, and entity relationship extraction, a knowledge graph for oil displacement is constructed, deeply integrating molecular structure, functional group attributes, performance indicators, and reservoir environmental parameters. Using graph computing and graph neural network technologies, hidden association rules are mined from the graph, establishing an interpretable mapping model from molecular microstructure to macroscopic performance and environmental adaptability. Finally, based on the established mapping relationships, and with target reservoir conditions and performance requirements as multiple constraints, candidate molecular structural features are generated through reverse reasoning, achieving knowledge-guided precise molecular design. This invention constructs a knowledge graph for oil displacement, revealing the complex intrinsic relationships between molecular functional groups, reservoir environment, and oil displacement performance. Through the combination of knowledge graphs and intelligent algorithms, it achieves intelligent and automated molecular design of oil displacement agents.

This invention discloses a method for evaluating the influencing factors of proppant breakage rate under reservoir conditions, comprising: S1: using an electric vibrating sieve and a sieve to screen the original proppant sample by particle size, testing the bulk density of the original proppant sample, and dividing the original proppant sample into two parts, I and II, each part being weighed according to a formula; S2: proppant breakage rate test under reservoir closure pressure conditions; S3: proppant breakage rate test under reservoir temperature conditions; S4: proppant breakage rate test under reservoir fluid environment conditions; S5: proppant breakage rate test under reservoir environment conditions; S6: calculating the processed proppant breakage rate according to the formula and analyzing the influence of influencing factors on the proppant breakage rate. The breakage rate testing and analysis method in this invention analyzes the degree of influence of influencing factors on the proppant breakage rate under reservoir conditions, providing experimental guidance for a more in-depth study of the proppant breakage rate mechanism.

The utility model relates to the technical field of reservoir environment detection, in particular to a reservoir environment detection device which comprises a floating plate, a fixing frame and a data collector, the lower end of the floating plate is fixedly connected with the fixing frame, the lower end of the fixing frame is internally and fixedly connected with an air bag, the inner wall of the floating plate is fixedly connected with a connecting column, and the inner side of the inner wall of the lower end of the connecting column is provided with a mounting groove. According to the device, the connecting column, the mounting groove, the circular ring groove, the connecting block, the metal brush assembly, the motor, the connecting plate and the electric telescopic rod are arranged, the motor and the electric telescopic rod are started, the electric telescopic rod drives the data collector, the protection frame and the protection net to integrally move upwards through the fixing plate, and the motor drives the protection net to integrally rotate; the metal brush assembly is arranged on the protective net, so that the protective net moves upwards while rotating, and when the protective net passes through the metal brush assembly, the metal brush assembly can effectively clean algae attached to the surface of the protective net, so that the subsequent detection result of the data collector is more accurate.

The invention belongs to the technical field of unconventional oil and gas development, relates to a shale conductivity and mechanical damage coupling correlation testing method, and aims to solve the problem that dynamic correlation of shale conductivity and mechanical damage in a complex reservoir environment cannot be accurately captured in the prior art. According to the method, synchronous monitoring of shale conductivity and mechanical damage under the combined action of hydration, temperature, confining pressure and stress loading is realized through standardized rock sample preparation, hydration treatment, multi-field parameter collaborative setting, synchronous test system building and whole-process data acquisition and analysis. According to the method, the corresponding rule of shale electrical characteristics and damage evolution under different development working conditions can be determined, a reliable experimental method support is provided for parameter optimization and reservoir stability monitoring of technologies such as underground dry distillation and hydraulic fracturing, and the method is suitable for development technology research of various shale gas reservoirs.

The invention provides a fracturing integrated digital twinning characterization method. The characterization method comprises the following steps: carrying out model data processing; carrying out oil reservoir environment fusion technology research on the underground model, and carrying out space fusion on a reservoir and a shaft in an underground three-dimensional field; and digital twinning integration is realized. Cross-business and cross-process full-life-cycle data integration is implemented, virtual-real interaction of digital twinning is achieved, and the difficult factors that at present, the number of fracturing construction departments is large, the related business field is complex, and ground and underground integrated means are lacked are effectively overcome.

This invention discloses a high-temperature, high-pressure supercritical carbon dioxide percolation experimental apparatus for shale core samples, relating to the field of shale oil development technology. The apparatus includes a CNC housing and a high-temperature, high-pressure percolation reactor; a weighing mechanism is installed at the bottom center of the reactor. Through the coordinated operation of the high-temperature, high-pressure percolation reactor, intermediate container, gas filling mechanism, high-pressure plunger pump, gas supply mechanism, heating resistor, and insulation shell, the high-pressure plunger pump precisely regulates the system pressure, ensuring high accuracy of the experimental pressure conditions. The heating resistor creates the required high-temperature environment inside the percolation reactor. These two components work together with the high-temperature, high-pressure percolation reactor to simulate a high-temperature, high-pressure reservoir environment, covering the high-temperature, high-pressure conditions required for shale oil development. The experimental adjustment range is large, allowing for accurate measurement of the supercritical carbon dioxide percolation oil recovery efficiency under different temperature and pressure conditions, ensuring the authenticity and reliability of the experimental simulation results.

The present application relates to reservoir safety monitoring and early warning technical field, especially to a kind of reservoir operating state prediction analysis method based on environmental data.The method comprises the following steps: through the vertical resistivity probe array of layout, using low-frequency alternating current signal acquisition reservoir bottom mud different depth original resistance response sequence;Original resistance response sequence is subjected to polarization effect compensation processing, and the bottom mud resistivity layer spectrum diagram is obtained;Reservoir environmental data are collected;Reservoir environmental data and bottom mud resistivity layer spectrum diagram are subjected to time series coupling analysis, and the bottom mud stability influence factor spectrum is obtained;According to bottom mud resistivity layer spectrum diagram and bottom mud stability influence factor spectrum, bottom mud layered structure model is constructed;The initial stress distribution map is obtained by calculating the basic stress field of bottom mud layered structure model.The present application is monitored from bottom mud inside to the whole chain technical route of multi-factor comprehensive analysis, and the early warning timeliness, accuracy and reliability of reservoir bottom mud disaster are significantly improved.

The present invention belongs to the field of shale reservoir development in the technology of oil and gas reservoir development, and discloses a pressure-soaking-infiltration-drainage integrated experimental device and method under the actual temperature and pressure conditions of a shale reservoir. The device includes: a power system, a fluid supply system, a reservoir simulation system, a temperature control system, and an electronic metering system; the power system is used to provide pressure to the fluid supply system; the fluid supply system is used to supply fluid to the reservoir simulation system, wherein the fluid is oil during the saturated oil process or fracturing fluid during the displacement process; the reservoir simulation system is used to simulate the integrated process of fracturing-soaking-infiltration-flowback under the actual temperature and pressure conditions of the target shale reservoir; the temperature control system is used to simulate the actual temperature of the shale reservoir; the electronic metering system is used to measure the oil saturation in the produced fluid. This device is resistant to high temperature and high pressure, can simulate the actual reservoir environment of ultra-high temperature and high pressure in the shale reservoir, and can realize the integrated process of fracturing-soaking-infiltration-flowback considering the actual formation pressure of the shale.

The invention relates to a continental facies shale oil reservoir lithofacies identification method and a continental facies shale oil reservoir lithofacies identification system based on time-frequency conjoint analysis. Constructing a logging data set with a label based on a data set preprocessing model constructed by a hybrid method; comprehensively capturing multi-scale characteristics of lithofacies change based on a logging curve data adaptive fusion model of TFAA-TCN; a logging curve time-frequency information extraction model based on Mama-MHSA is combined with Mama long-term dependency relationship capture and multi-head attention mechanism MHSA feature screening, the long-term dependency relationship of spatial information of a logging curve and attention weights among different features are mined, and continental facies shale oil reservoir lithofacies identification is carried out. According to the method, the accuracy of continental facies shale oil reservoir lithofacies identification is effectively improved, the extraction and fusion mode of logging curve characteristics is optimized, and the adaptive capacity to a complex reservoir environment is enhanced.

The present application relates to a kind of rock triaxial mechanical parameter testing device and method under the contact of carbon dioxide, including rock and carbon dioxide contact and triaxial compression test system and with rock and carbon dioxide contact and triaxial compression test system respectively connected axial pressure control system, confining pressure control system, temperature control system and carbon dioxide pressure control system, still include computer data record and control system;The axial pressure control system, confining pressure control system, temperature control system and carbon dioxide pressure control system are connected with computer data record and control system;The present application simulates triaxial rock mechanics parameter test in the direct contact process of underground reservoir rock and carbon dioxide in the process of carbon dioxide drilling, fracturing, displacement, burying etc., can obtain the rock mechanics parameter in the direct contact process of carbon dioxide and rock under the most close real reservoir environment and engineering condition.

The invention relates to the technical field of oilfield exploitation, in particular to a temperature-sensitive magnetic dual-response intelligent nano chemical oil displacement agent and a preparation method thereof. The invention discloses a temperature-sensitive magnetic dual-response intelligent nano chemical oil-displacing agent and a preparation method thereof, and on the basis of synthesizing a magnetic response intelligent nano chemical oil-displacing agent, the surface of the magnetic response intelligent nano chemical oil-displacing agent is coated with a temperature-sensitive polymer to form the temperature-sensitive magnetic dual-response intelligent nano chemical oil-displacing agent. The intelligent nano oil-displacing agent prepared by the invention is mild in preparation condition, simple in technical route and easy to realize large-scale production, has unique oil-displacing characteristics, can adapt to special conditions of different oil reservoir environments, plays a role in directionally improving the crude oil recovery rate, and has a relatively good application prospect.

The invention relates to the technical field of oil and gas geology and reservoir engineering, and discloses a physical experiment device and method for simulating the shale oil seepage process, and the physical experiment device comprises an inlet pressure control system which is used for providing driving pressure for a rock core arranged in a sample holder, the inlet pressure control system comprises a liquid pressure control system and a gas pressure control system, and the gas pressure control system comprises a low-pressure control gas source; and the confining pressure and temperature control system is used for applying confining pressure to the rock core and controlling the experimental temperature. The problems of reservoir environment simulation distortion and inaccurate micro flow measurement in the prior art are solved, accurate quantitative evaluation of key seepage parameters such as the starting pressure gradient, the equivalent aperture and the boundary layer thickness is achieved, a scientific basis can be provided for shale oil favorable lithofacies recognition, classified development modeling and oil reservoir dynamic prediction, and the method is suitable for large-scale popularization and application. And the method has a good engineering application prospect.

This invention discloses a triple-responsive rheology modifier for carbon dioxide, temperature, and pressure, its preparation method, and its application, belonging to the field of oil and gas field development technology. The rheology modifier comprises N,N-dimethylacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, a carbon dioxide-responsive monomer, an alkyl methacrylate hydrophobic monomer, oleamide-propyl dimethylamine oxide sulfobetaine, a crosslinking agent, 2,2'-azobisisobutylamidine dihydrochloride, 3-mercaptopropionic acid, and water. The rheology modifier of this invention exhibits triple-responsive characteristics to carbon dioxide, temperature, and pressure, enabling viscosity stability under high temperature, high pressure, and high salinity conditions during fracturing in complex reservoir environments, controllable gel breaking during well shut-in, and intelligent utilization and release of carbon dioxide, achieving intelligent and low-carbon control throughout the entire fracturing, well shut-in, and oil displacement process.

This invention belongs to the field of oil and gas field development technology and discloses a temperature-pH dual-responsive smart fracturing proppant and its preparation method. The proppant adopts a three-layer core-shell structure, including a high-strength ceramic or quartz sand core, a polyvinyl alcohol crosslinking transition layer reinforced with nano-silica, and a poly(N-isopropylacrylamide-co-acrylic acid) copolymer smart response layer. In the low-temperature proppant carrying stage, the smart response layer hydrates and swells to form a gel layer, giving the proppant excellent suspension performance and friction reduction ability, realizing water fracturing. In the high-temperature reservoir environment, the phase transformation of the temperature-sensitive segment and the protonation of the pH-sensitive segment cause the smart response layer to shrink and detach rapidly, realizing autonomous gel breaking and aiding in fracturing. The nano-reinforced transition layer significantly improves the anti-fracture performance, reducing the fracture rate to 6% to 11% and increasing the long-term conductivity by 35% to 58%.

According to the device and method for testing the gas-bearing property in the coal rock fracturing process, the axial pressure control assembly and the confining pressure control assembly are arranged to apply different axial pressures and confining pressures to the rock core sample so as to simulate the reservoir environment of the coal rock, and the acting force on the rock core sample can be changed by adjusting the axial pressure and the confining pressure; a fracturing process can be simulated, the axial expansion and contraction amount and the radial expansion and contraction amount of the rock core sample under different axial pressures and confining pressures can be acquired through the strain acquisition assembly, and the total volume variation of the rock core sample can be obtained based on the axial expansion and contraction amount and the radial expansion and contraction amount. The free gas content and the adsorbed gas content of the rock core sample are obtained based on the total volume variable quantity, so that the gas content change condition of the deep coal rock in the fracturing process is represented; the problem that the gas content change condition of deep coal rock in the fracturing process cannot be represented in existing coal rock gas content evaluation can be solved.

The invention relates to the field of reservoir ecological environment protection, and particularly discloses a gas emission method for improving the greenhouse effect of a reservoir, and the method comprises the following steps: setting a collection station to collect a water sample, meteorological information and the concentration of greenhouse gas in the atmosphere; processing and analyzing to obtain the dissolving concentration characteristic of the greenhouse gas in the water sample and the greenhouse gas flux of the water-gas interface of the reservoir; carrying out statistical analysis on the collected information, the dissolution concentration of the greenhouse gas in the water sample and the greenhouse gas flux of the water-gas interface of the reservoir to obtain a correlation chart of the environmental factors and the greenhouse gas emission amount of the reservoir; the environmental parameters of the reservoir are integrally adjusted and adjusted in real time, and the greenhouse gas emission of the reservoir is reduced. The reservoir information is comprehensively analyzed and counted through multiple aspects and multiple ways, the linear relation between the reservoir environment factors and the greenhouse gas emission amount of the water body is obtained, then the reservoir environment is scientifically adjusted according to the linear relation, and the greenhouse gas emission amount of the reservoir is greatly improved.

The invention relates to the technical field of CO2 oil displacement, in particular to a cationic copolymer, a nano-microsphere, a preparation method of the nano-microsphere and application of the nano-microsphere. According to the cationic copolymer, supercritical CO2 and water can be self-emulsified under the oil field stratum condition to form stable emulsion; the cationic copolymer has a positively charged hydrophilic chain link structure, a CO2-philic chain link structure and a propyl alcohol type lipophilic chain link structure at the same time, and has various affinity characteristics of hydrophilicity, lipophilicity and CO2 affinity in a supercritical CO2 fluid. Therefore, the cationic copolymer provided by the invention can form a CO2 / water emulsion when encountering formation water in a relatively severe complex reservoir environment, and the emulsion is subjected to a mixed-phase process when encountering oil to form a quasi-mixed state. The quasi-mixed state can solve the key problem of stratum water influence in the aperture system, the effect of replacing crude oil with CO2 in the matrix is further enhanced, and the crude oil recovery rate is increased.