50 results about "Reservoir simulation" patented technology

The invention provides an automatic history fitting method for gas drive numerical reservoir simulation, which comprises the following steps of: 1, establishing a gas drive numerical simulation mathematical model, and correcting the gas drive numerical simulation mathematical model by using a gas drive PVT phase state fitting experiment; 2, solving the corrected gas drive numerical simulation mathematical model obtained in the step 1, performing parameter analysis, and screening main control factors influencing accumulated oil production; 3, generating a numerical simulation training sample set based on an orthogonal experiment, and obtaining the main control factor parameter initial value constraint screened out in the step 2 through a machine learning algorithm; step 4, establishing a multi-parameter fitting objective function for realizing historical fitting; and step 5, using the main control factor parameter initial value constraint obtained in the step 3, performing iterative calculation through a projection gradient method, fitting the target function established in the step 4, and terminating when a convergence condition is satisfied. According to the method provided by the invention, the constraint parameter values can be adaptively calculated, automatic historical fitting is completed, and the definition of the fitting parameter range does not depend on empirical and experimental determination any more.

The invention provides a heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity drainage, and belongs to the field of oil-gas field development. The experimental device comprises a three-dimensional oil reservoir simulation system, a microwave-assisted heating system, a horizontal well injection-production regulation and control system and a multi-field monitoring system; the microwave auxiliary heating system comprises a microwave generation regulation and control system, a microwave transmission system and a shaft integrated microwave radiator, the microwave generation regulation and control system comprises an industrial grade microwave generator, a power regulator and a PLC, and the microwave transmission system comprises a microwave coaxial cable and a microwave waveguide tube bundle; and the microwave generator is continuously connected with the microwave waveguide tube bundle and the shaft integrated microwave radiator. According to the heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage, the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce a'thermal-flow-force 'multi-field coupling environment, the microwave heating adaptability is poor, and the experimental scale and the field deviation is large are solved. The heavy oil thermal-flow coupling development experimental device and method based on microwave-assisted gravity oil drainage solve the technical problems that an existing deep heavy oil thermal recovery experimental device cannot reproduce the'thermal-flow-force' multi-field coupling environment.

The embodiment of the invention provides a single-well water channeling shielding type remaining oil quantitative characterization method and system, and belongs to the technical field of oil reservoir simulation. The method comprises the steps that seismic attribute information of a target oil reservoir area is collected, oil and gas filling path analysis is executed based on the seismic attribute information, and whether an oil reservoir is located on an oil and gas filling path or not is judged and researched based on an analysis result; in response to a trigger signal that an oil reservoir is located on an oil and gas filling path, respectively executing karst cave three-dimensional depiction and fracture three-dimensional depiction based on the seismic attribute information to obtain fracture-cave well space structure characteristics; based on the single well exploitation data in the target oil reservoir area, oil and gas exploitation degree analysis is executed, and oil and gas exploitation degree information is obtained; and performing residual oil quantitative characterization based on the space structure characteristics of the fracture-cave well and the oil and gas exploitation degree information, and outputting the space distribution and scale of the residual oil. According to the scheme, the residual oil quantitative characterization is executed based on the fracture-cave well space structure characteristics and the oil and gas exploitation degree information, the space distribution and scale of the residual oil can be output, and important reference is provided for follow-up oil and gas resource management and development.

The invention relates to a buried hill gas storage effective gas storage space evaluation method, and belongs to the technical field of oil-gas exploration. The method comprises the following specific steps: acquiring fracture development parameters; determining the type of a storage space; reservoir logging response characteristics are determined; extracting buried hill cracks; establishing a bedrock geologic model and a bedrock buried hill discrete fracture model of the target area; and importing the results into a gas storage simulation model in the form of data flow, extracting effective gas storage spaces of a substrate and a crack of the buried hill gas storage, and determining a final buried hill building effective gas storage space. Through research on the method for calculating the reservoir space of the buried hill oil and gas reservoir rebuilt gas storage, the problem of invalid reservoir space calculation is deducted, the calculation accuracy is improved, and theoretical support is provided for calculation of the buried hill reservoir building capacity and later injection and production well position deployment.

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 application provides a method and system for calculating the conductivity of a sand-acid fracturing reservoir simulation system, which comprises the following steps: constructing a simulation parameter combination set around sand-acid fracturing operation parameters for reservoir types with sand-acid fracturing requirements; analyzing fracture acid erosion data of different reservoirs by using a preset fracture acid erosion calculation model, and analyzing the embedding depth and deformation data of the proppant in combination with the injection rate parameters and the proppant data; further analyzing the sand concentration of sand-acid fracturing, and setting a rough body simulation distribution coefficient in combination with the injection rate, so as to form a reservoir fracture model that presents a real fracturing state; analyzing the permeability state of the reservoir fracture model after fracturing based on the rough body simulation distribution coefficient and the reservoir closure pressure; and further calculating the corresponding conductivity in combination with the fracture width calculated according to the fracture acid erosion data, the embedding depth and deformation data of the proppant. The method solves the problem that the sand-acid fracturing conductivity cannot be quantitatively analyzed, and provides support for field acid fracturing design and productivity prediction.

The invention relates to the technical field of carbon sequestration and geological sequestration, and particularly discloses a slice CO2 water-rock reaction corrosion identification and pore evaluation method based on machine learning, and the method comprises the steps: firstly collecting multi-focal-plane images of the same view field of a slice before and after a reaction on a scanning electron microscope platform, and carrying out the registration; utilizing the trained U-Net instance segmentation model to automatically identify a corrosion area and extract a contour; generating a relative height map through a depth-of-field reconstruction and calibration technology in combination with a multi-focal-plane sequence, and obtaining the effective corrosion depth of each corrosion area; and carrying out volume normalization calculation based on area-depth information, and directly outputting porosity increment and spatial distribution thereof. According to the method, destructive detection is not needed, quantitative volume characterization of corrosion characteristics is achieved, the analysis efficiency and accuracy are remarkably improved, batch processing and mineral phase layering statistics are supported, and reliable data support is provided for CO2 geological storage reaction mechanism research and reservoir simulation.

The invention discloses a tight oil reservoir depletion type development wave and region evaluation device and method. The device comprises a tight oil reservoir simulation system, a horizontal well system, a pressure monitoring system and a production system, the tight oil reservoir simulation system comprises a reservoir simulation device and a fluid injection device which are connected. The reservoir simulation device can be filled with sand grains in a layered manner so as to simulate a target tight oil reservoir; the fluid injection device is used for injecting simulated formation water and simulated formation oil; the horizontal well system comprises a plurality of horizontal wells; each liquid production pipe is connected with a corresponding horizontal well outlet and is connected with a produced liquid metering device; the pressure monitoring system comprises a signal processor, a pressure sensor and a plurality of pressure probes; and the plurality of pressure probes are arranged in the reservoir simulation device. According to the device, the distribution rule of the sweep area can be identified according to the pressure change, the recovery ratio corresponding to the sweep area can be obtained, and therefore sweep area evaluation is achieved through physical simulation, and production guidance is provided for depletion type development of tight oil reservoirs.

A method may include obtaining grid model data regarding a geological region of interest. The method may further include obtaining well data regarding a well in the geological region of interest. The method may further include obtaining a grid model for the geological region of interest based on the grid model data and the well data. The method may further include obtaining a time selection for a look-ahead simulation. The method may further include determining a look-ahead model for the look-ahead simulation based on the grid model data, the well data, and a coarsening function. The method may further include performing the look-ahead simulation using the look-ahead model and the time selection. The method may further include performing a reservoir simulation of the geological region of interest using the grid model and the look-ahead simulation.

The invention provides a microfluidic microscopic remaining oil form recognition device and method based on a YOLO model, and belongs to the technical field of oil reservoir simulation and analysis, and the method comprises the following steps: S1, data acquisition and preprocessing; s2, feature extraction and coding; s3, boundary constraint and low-rank adaptation fine tuning; s4, decoding and segmentation loss optimization; s5, multi-scale feature fusion and mask refinement are carried out; s6, performing form post-processing and EOR parameter extraction; and S7, performing performance verification and iteration. The YOLO model-based microfluidic microcosmic remaining oil form recognition device and method provided by the invention solve the influence of factors such as fuzzy oil-water interfacial tension, difficulty in micron-sized oil drop trapping and lagging real-time analysis in a dynamic displacement process on the saturation, recovery ratio and multiphase flow relative permeability evaluation of the remaining oil in the prior art.

The application discloses a testing device and method for element sulfur solubility in high-sulfur gas reservoir development process, and the testing device comprises a fluid injection system, a reservoir simulation system, a sulfur solubility metering system and a data tracking and processing system; the fluid injection system is connected with the reservoir simulation system; the reservoir simulation system is connected with the sulfur solubility metering system; the data tracking and processing system is connected with the sulfur solubility metering system; the fluid injection system is used for injecting a sulfur-containing gas sample into the reservoir simulation system and the sulfur solubility metering system; the reservoir simulation system is used for simulating the flow of the sulfur-containing gas sample in a reservoir and a complex interface physicochemical action process; the sulfur solubility metering system is used for metering the sulfur solubility in the sulfur-containing gas sample; and the data tracking and processing system is used for processing data. The testing device in the application comprises two sulfur solubility testing units, so that the testing precision is effectively improved, and the measurement loss and safety risk caused by the flow of the sulfur-containing gas sample in pipelines and valves are reduced.

The invention relates to the technical field of teaching tests, in particular to a small pumped storage experimental platform which comprises a water storage tank, a supporting platform is arranged behind the water storage tank, a height-adjustable upper reservoir simulation cabin is arranged on the front side of the top end of the water storage tank, and a height-adjustable hydraulic turbine set is arranged on the rear side of the top end of the water storage tank. The lower reservoir simulation cabin is fixedly installed on the front side of the top end of the supporting platform, the mixing chamber is installed at the top end of the lower reservoir simulation cabin, a water flow adjusting mechanism is arranged between the lower reservoir simulation cabin and the mixing chamber, and the upper reservoir simulation cabin is connected with the hydraulic turbine set through a first communicating pipe. And the hydraulic turbine set is connected with the lower reservoir simulation cabin through a second communicating pipe. Through a height-adjustable simulation system, accurate concentration control, efficient material recycling and an intelligent filtering and cleaning mechanism, a closed-loop experiment environment is constructed; and the authenticity and the data reliability of flood working condition simulation of the pumped storage power station are effectively improved.

This invention provides an optimization method for CO2 injection and production in multi-stage fractured horizontal wells. The optimization method includes: Step S1: Establishing a reservoir simulation calculation model required for CO2 injection and production optimization in multi-stage fractured horizontal wells; Step S2: Establishing the optimization objectives, variables, and constraints for CO2 injection and production in multi-stage fractured horizontal wells; Step S3: Establishing a framework for the optimization method of CO2 injection and production in multi-stage fractured horizontal wells based on PPO; Step S4: Applying the obtained optimization parameters for CO2 injection and production in multi-stage fractured horizontal wells to specific blocks and analyzing the reasons for the high total net present value of the injection and production optimization scheme. This method can simultaneously and dynamically optimize the injection and production rates and durations at different stages of injection and production, achieving variable injection and production rates and durations, which better meets the practical needs of injection and production in mining operations.

A method for generating history matched grid data. The method includes obtaining observed production data and obtaining latent grid data. The method further includes processing the observed production data to form observed latent production data and generating denoised latent grid data by removing noise from the latent grid data using a diffusion model guided by the observed latent production data and a time encoding. The method further includes generating history matched grid data by decoding the denoised latent grid data and optimizing production of a well using the history matched grid data.

The embodiment of the application provides a kind of based on agent model's oil reservoir remaining oil prediction method and system, the method includes: setting oil reservoir simulation data, combining oil reservoir simulation module, generate sample data set;Based on the data type of sample data set, corresponding data preprocessing is carried out, and data is converted into two-dimensional matrix form;Residual oil prediction model is constructed, and residual oil prediction model is the encoder-decoder network of fusion residual structure, and coordinate attention mechanism is introduced;Two-dimensional matrix form sample data set is input data, and residual oil prediction model is iteratively optimized, and iteration is until convergence, to obtain the trained residual oil prediction model;The complete input parameter of target oil reservoir is acquired, and the trained residual oil prediction model of input complete parameter is output target oil reservoir remaining oil distribution result.

The application relates to the field of oil and gas geophysical prospecting engineering and discloses a method for effectively monitoring carbon dioxide storage leakage, which comprises the following steps: S1. establishing a geological model for carbon dioxide storage and performing reservoir simulation, and constructing a time-lapse synthetic model with different carbon dioxide saturations; S2. using rock physics theory, analyzing reservoir rock physics response characteristics under different carbon dioxide saturations, and deducing an elastic parameter model; S3. using a viscous-sound wave equation of a standard linear solid attenuation model to carry out seismic forward simulation, generating time-lapse seismic data, and performing reverse-time migration imaging; and S4. based on the reverse-time migration profile obtained in S3, using a frequency spectrum ratio method of an imaging domain to perform real-time monitoring on leakage conditions of carbon dioxide in early, middle and late stages after injection. The workflow provided by the application realizes comprehensive monitoring and prediction on carbon dioxide plume migration by integrating reservoir simulation, rock physics analysis and time-lapse seismic monitoring technology.

The application discloses a critical path-based oil-water two-phase seepage model construction method and system and a medium, relates to the oil and gas field development technical field, and combines traditional black oil model simulation technology and critical radius technology based on critical path seepage theory, proposes an oil-water two-phase seepage characteristic oil reservoir simulation method considering microscale critical paths on the basis of ensuring the scale of the oil reservoir model, restores micro characteristics such as internal pore throat structures of real reservoir rocks to the maximum extent by using the critical radius, and studies factors such as the influence of the dominant channel (critical path) of oil-water two-phase fluid seepage in the pore throat and displacement efficiency on the phenomenon from the micro perspective, so that higher-precision oil reservoir simulation analysis results are obtained; the scheme directly calculates the flow and pressure of each component of oil and water based on the critical radius and the critical path length, does not need to input a static oil-water relative permeability curve in the simulation process, and can more directly reflect the stress state and change process of each part of the oil reservoir.

The invention provides a heavy oil reservoir steam huff and puff simulation device and method, and belongs to the technical field of oil-gas field development. The heavy oil reservoir steam huff and puff simulation device comprises a heat preservation box, a steam generator, an injection system and a reservoir physical model. The steam generator and the reservoir simulation model are arranged in the thermal insulation box; the steam generator comprises an exchange coil pipe, one end of the exchange coil pipe penetrates through the heat preservation box to be connected with the injection system, and the other end of the exchange coil pipe is connected with a reservoir simulation model in the heat preservation box; the steam generator heats distilled water from the injection system into steam through the exchange coil and then outputs the steam into the reservoir simulation model, and the reservoir simulation model simulates steam huff and puff of the stratum heavy oil reservoir through the steam. The steam generator and the reservoir physical model are integrally arranged in the heat preservation box, and the environment temperature for simulating the steam huff and puff process is kept through the heat preservation box, so that the stability of the steam temperature is guaranteed.

The invention discloses a water body rendering method, system and device for a reservoir and a medium, and the method is characterized in that the method comprises the steps: obtaining the ground height and initial water surface depth of each grid unit in a simulation domain grid of the reservoir; determining a water surface height difference value corresponding to each grid unit on the basis of the ground height and the initial water surface depth, determining an adjacent height difference value between each grid unit and a plurality of adjacent grid units on the basis of each water surface height difference value, and determining a water surface height difference value between each grid unit and the plurality of adjacent grid units on the basis of the adjacent height difference value and a preset pipeline parameter, according to the initial water surface depth, calculating to obtain water flow flux, obtaining a water body volume variation corresponding to each grid unit in a preset time period based on the water flow flux, calculating to obtain an update value based on the water body volume variation, and determining a target water surface depth based on the update value and the initial water surface depth; and rendering the target water surface depth to the surface of the triangular mesh to obtain a water body rendering result of the reservoir. According to the method and the device, rapid water body rendering can be realized at the Web end.

This invention belongs to the field of experimental technology for oil and gas field development, specifically relating to an experimental device and method for CO2 injection at the gas-water interface to suppress bottom water displacement of natural gas. The device includes a reservoir simulation system, a fluid injection system, a multi-dimensional visualization monitoring system, and a production metering system. The reservoir simulation system uses a sand-filled pipe to simulate a vertical reservoir, and a temperature control module regulates the temperature of the sand-filled pipe. The fluid injection system uses a fixed-point injection pipe with adjustable depth that can penetrate deep into the pipe body to precisely inject CO2 into the gas-water interface. The multi-dimensional visualization monitoring system uses a scanner and krypton tracers mixed with simulated natural gas and sodium iodide tracers mixed with simulated formation water to achieve dynamic monitoring of multiphase fluids throughout the displacement process. This invention can simulate the vertical development characteristics of deep bottom water gas reservoirs with high fidelity, intuitively revealing the mechanism of CO2 inhibition of bottom water coning, and providing precise experimental basis for optimizing gas reservoir development schemes.

The invention belongs to the technical field of gas reservoir simulation experiments, and discloses a physical simulation device and method for water invasion and water blocking of a gas reservoir. The gas reservoir water invasion and water blocking physical simulation device comprises a base, a constant temperature box, a kettle body, an injection assembly and a simulation shaft, the base is provided with a rotating support, and the rotating support is used for simulating a stratigraphic dip angle; the constant-temperature box is fixedly arranged on the rotating bracket; the kettle body is arranged in the constant-temperature box, and the injection assembly is used for injecting simulated water and / or first gas into the rock physical model in the kettle body; the bottom ends of the simulation wellbores extend into the rock physical model from top to bottom, the top ends of at least part of the simulation wellbores are provided with gas injection assemblies to inject second gas into the rock physical model, and the top ends of at least part of the simulation wellbores are provided with production and production assemblies. According to the invention, edge-bottom water invasion or gas injection water resistance of different types of gas reservoirs can be simulated, water invasion and water resistance mechanisms can be researched, and a basis is provided for gas reservoir development for inhibiting water invasion or improving water resistance.

The present disclosure relates to computer-implemented methods, software, and systems for dynamic updating of reservoir properties of a numerical reservoir simulation model. Input data associated with changes of properties of a geological model of a reservoir due to fracking events can be obtained. A simulation event file can be generated to include instructions to provide portions of the input data to guide an execution of a numerical simulation model. The simulation event file can be provided as input during the execution of the numerical simulation model to calibrate, based on the instructions of the simulation event file, the numerical simulation model with the geological model of the reservoir. A calibrated numerical simulation model can be generated based on processing the input data associated with the changes of the properties of the geological model of the reservoir during the execution of the numerical simulation model.

The invention discloses a fracture discretization method and device for numerical reservoir simulation. The method comprises the steps that matrix grid division is conducted on a target area; determining a target matrix grid; cutting an intersection surface of the target matrix grid and the crack; calculating a first conductivity by adopting an analytical algorithm; determining the type of each sub-polygon according to the position relationship between the target matrix grid and the sub-polygons and the connection relationship between the sub-polygons; determining a second conductivity calculation algorithm between the sub-polygons; calling a second conductivity calculation algorithm to calculate the second conductivity of the sub-polygons of the corresponding type; according to the method, the accuracy, the efficiency and the universality of fracture discretization and the suitability of a reservoir numerical simulator can be remarkably improved, and the operation cost is reduced.

The present application relates to the technical field of geological model visualization, and particularly relates to a real-time cutting and three-dimensional visualization method of a corner point grid geological model, comprising generating a data file for describing a geological model in a corner point grid format; reading the data file to obtain grid numbers and grid attribute values in each direction; traversing all grids to calculate spatial coordinates of all grids in the geological model by a calculation method of eight spatial coordinates of a single grid; eliminating irrelevant grid surfaces; reconstructing three-dimensional geological grids; traversing a top layer grid of the geological model to add all spatial coordinates of a top surface of the top layer grid and corresponding topological relations to a drawing data set; and establishing three-dimensional geological grids of divided regions. The present application can effectively solve the problem that in deep local research on a three-dimensional geological model, a large amount of irrelevant data is displayed to affect target information; and has practical significance in post-processing of reservoir simulation.

This invention provides an experimental apparatus and method for measuring heavy oil saturation based on multiphysics coupling, belonging to the field of oil and gas field development. It includes a reservoir simulation system, a reservoir development system, and a remaining oil content measurement and control system. The reservoir simulation system comprises a three-dimensional sand-filled model shell, with the shell filled with a porous medium. The shell is connected to the formation pressure system via pipelines, and an external model communication system connects to the shell. The reservoir development system includes an injection supply system, a metering and control system, and a well network system. The remaining oil content measurement and control system includes a pressure-conducting detection system, a conductivity detection system, a thermal conductivity detection system, and a multiphysics coupling saturation measurement system. This invention, employing the aforementioned experimental apparatus and method for measuring heavy oil saturation based on multiphysics coupling, satisfies the requirement for quantitative evaluation of oil saturation during heavy oil reservoir development simulation experiments.

A method comprises measuring a pressure at a plurality of times and a measured flow rate in a well. A measured productivity index (PI) is determined based, at least in part, on the measured flow rate and the pressure at the plurality of times. A flow rate at a second time is simulated, and a fluid pressure at the second time and a third time is simulated. A simulated PI is simulated based, at least in part, on the flow rate at the second time, and the fluid pressure at the second time and at the third time. An updated reservoir simulation model is generated by updating at least one parameter of the reservoir simulation model based, at least in part, on a difference between the measured PI and the simulated PI.

An oil and gas reservoir numerical simulation model optimization method relates to the technical field of oil and gas development, and comprises the steps of collecting geological, logging and reservoir data of a target area, determining a model grid range, reservoir distribution and continuity of an established geological numerical model of the target area, investigating whether disconnected grids exist in the numerical model or not, and if yes, establishing a reservoir simulation model; performing preliminary model optimization on disconnected grids through numerical simulation software, performing calculation efficiency optimization on a numerical model without disconnected grids or subjected to preliminary model optimization, performing trial operation on the model subjected to calculation efficiency optimization, and judging whether the model meets simulation and production requirements or not; the models meeting the requirements are used for subsequent numerical simulation research, and the models which do not meet the requirements are subjected to calculation efficiency optimization again until the requirements are met; according to the method, the problem that the calculation speed of the model is influenced by invalid grids and range grids in geological modeling can be solved, the modeling process does not need to be repeated to adjust the geological model, and direct optimization of the numerical simulation model is realized.