65 results about "Commercial software" patented technology

The invention discloses a hybrid nonlinear floating fan hydrodynamic load coupling calculation method. The method comprises the steps of obtaining a velocity potential of a wave field in a computational domain through OceanWave3D numerical simulation (a wave field calculation model), and performing post-processing to obtain wave field data; dividing an instantaneous wet surface according to the six-degree-of-freedom motion, calculated based on an OpenFAST (floating fan calculation model), of the floating fan in each time step, and performing pressure integration to obtain a Front-Krylov force; updating the hydrostatic stiffness matrix according to the real-time position change of the buoyancy center of the fan, and calculating hydrostatic restoring force; linear radiation force and diffraction force are calculated through time domain convolution of frequency domain data, nonlinearity of the radiation force and the diffraction force is considered based on an instantaneous wetting volume change coefficient, and hydrodynamic load and structural motion response calculation in the current time step is completed after the OpenFAST is coupled. According to the method, coupling calculation between the open source code OpenFAST and OceanWave3D is achieved, and compared with commercial software at the present stage, the method is more accurate in wave load calculation under the extreme wave sea condition.

The invention relates to the technical field of embedded maps, and provides a vector map display method under a VxWorks system, which comprises the following steps: S1, analyzing a vector map source file through an MITAB library, and extracting geometric space topological data, geographic coordinate system parameters, style attributes and projection parameters; s2, constructing a hierarchical storage structure based on SQLite3, and storing vector map information including a spatial data table, a style configuration table and a metadata table into a geographic information database; s3, creating a map display control MapWidget inherited from a QGraphics View class based on a Qt framework, loading the geographic information database through a dynamic configuration interface, and initializing a coordinate system conversion module, a multi-level view window module and a covering management system; and S4, dynamically rendering and outputting an interactive vector map interface through a layer priority scheduling strategy in a VxWorks real-time operating system. Through the design of the cross-platform data middle layer, the extensible general symbology system and the resource efficiency optimization, the data compatibility problem of the embedded system and the commercial GIS software is solved.

The invention belongs to the field of laser processing and numerical simulation, and particularly relates to a finite element modeling and analysis method for a nanosecond pulse laser target material. The method comprises the following steps: establishing and loading a laser heat source model; establishing a target material finite element model and carrying out grid division; establishing and solving a transient heat conduction equation; carrying out multi-cycle iterative solution and post-processing; and performing model verification and parameter analysis. According to the method, the laser heat source model is established, the adaptive grid encryption strategy for temperature gradient optimization is adopted, and the transient solution algorithm is combined, so that compared with a traditional simplified analysis model or general commercial software simulation, the prediction precision of the target material temperature field spatio-temporal evolution law under the nanosecond pulse laser effect is remarkably improved. The method can accurately predict the temperature distribution and evolution law of the target material under the action of laser, has the advantages of high modeling precision, good calculation efficiency, wide application range and the like, and is suitable for engineering applications such as laser processing and damage evaluation of optical materials and composite materials.

The invention discloses a ChatGPT-python programming method, particularly relates to the field of artificial intelligence, and comprises three steps of problem definition, algorithm design and code implementation. According to the method, project situations are described in detail through question definition, and ChatGPT is guided to generate project schematic diagrams; through a design algorithm, a calculation problem is elaborated, and ChatGPT is required to provide an effective solution; by implementing codes, generating a feasible programming solution according to a calculation theory, providing intelligent suggestions in each process, ensuring theoretical accuracy and engineering feasibility of a result through manual examination, and comparing by taking three-dimensional slope stability analysis as a case and combining with a calculation result of commercial software, a calculation result of the three-dimensional slope stability analysis is obtained. It is verified that the Python algorithm obtained through ChatGPT programming has good calculation precision, an innovative auxiliary means is provided for engineering calculation, and the huge application prospect of artificial intelligence in the field of civil engineering is shown.

The invention belongs to the technical field of oil and gas fields, and particularly relates to an oil and gas field ground and underground integrated construction method with a three-dimensional model fused with a mechanism model, which comprises the following specific steps of: comprehensively combing an existing mature commercial software model and a mechanism model established based on an equipment process operation principle; functions, application ranges and data characteristics of all the models are determined; and determining boundary conditions among different mechanism models. According to the method, for the closed-loop interaction problem of field facilities and virtual objects, integrated coupling between models and between the models and data is achieved, dynamic closed-loop, data support and real-time interaction are completed in a virtual space, a technical foundation is laid for simulation, prediction and optimization of the virtual models on twin entities, and the method has the advantages of being high in practicability and wide in application range. Therefore, fine management and control of the whole oil and gas field production process are realized, and the whole oil and gas field production process can be comprehensively and accurately simulated and optimized.

The invention provides a thermal elastic structure joint topological optimization method based on MATLAB and ABAQUS, and belongs to the technical field of thermal elastic structure optimization design. Firstly, finite element models of mechanical loads and thermal loads are established in ABAQUS, and files are exported; then calling an ABAQUS operation model in MATLAB, extracting core data such as nodes, units and a stiffness matrix, and constructing a parameterized thermodynamic finite element model based on an SIMP method; calculating a function value and sensitivity by taking volume minimization as a target and taking global stress and temperature constraint as conditions; and finally, iteratively optimizing the design variables by adopting a moving asymptote algorithm, and obtaining a final topological configuration through a filtering method. Through deep cooperation of MATLAB and ABAQUS, core finite element data of commercial software is extracted at a time for optimization iteration, repeated data generation and interaction are avoided, the calculation efficiency is greatly improved, and an efficient solution is provided for processing the topological optimization problem of stress and temperature constraints under complex heat-force loads.

The invention discloses a carotid artery lumen geometric model construction system based on a CTA image, relates to the technical field of image processing, and comprises a data import module, a volume data cutting module, an interactive carotid artery lumen segmentation module, a 3D model construction module, a model processing module, a model cutting module, a boundary detection module, an entrance and exit filling module, an STL file export module and the like. The modules are clear in division of labor and have detailed working processes. According to the method, the problems that an existing geometric modeling method depends on commercial software, cost is high, legal risks exist, the operation process is tedious, and the speed is low are solved, the carotid artery geometric model can be simply, conveniently, efficiently and accurately constructed, and powerful support is provided for carotid artery fluid dynamics analysis, research and diagnosis of diseases such as atherosclerosis and aneurysm.

The invention discloses a stable numerical simulation method for a total ionization dose (TID) and transient dose rate (TDR) synergistic effect in a semiconductor device. According to the method, a control volume finite element tearing interconnection (CV-FETI) method is utilized, discontinuous boundary conditions are included in common numerical properties, a Newton method is adopted to overcome non-convergence caused by nonlinear characteristics of a drift diffusion model, a stable three-dimensional parallel numerical format is adopted, and a non-continuous boundary condition is obtained. Reliable and accurate simulation of radiation of the semiconductor device is realized. Compared with a Gummel iteration method, the method has good numerical stability and precision under the same voltage step. Through comparison with a commercial software calculation result, the effectiveness of the method is verified. The method provided by the invention has the advantages of good stability, precision and applicability, and can be used for high-efficiency and high-precision numerical simulation of the radiation effect of a semiconductor device, thereby improving the performance, robustness and reliability of an integrated circuit.

The embodiment of the application discloses a kind of identification methods of pointer chasing memory access mode, the execution trajectory of binary instruction generated when target program runs is obtained by binary instrumentation, the execution trajectory of binary instruction is statically analyzed to obtain five-level consistency query result, address dependency relationship category and context stability category are obtained by dynamic analysis, on this basis, value flow causality verification is executed, address dependency relationship category, five-level consistency query result, value flow verification causality result and context stability category are successively combined to carry out multilevel determination, the final determination result of each binary instruction is generated, and whether the binary instruction is pointer chasing memory access mode is confirmed according to the final determination result, without source code, pointer chasing memory access mode can be accurately identified, and multi-level confidence determination is provided, which can be directly applied to commercial software, third-party library and legacy system etc. Source code unavailable scene.

The present application relates to a kind of diesel engine electronic control system hardware PCB power supply function model calibration and identification method, this method is in the process of traditional mature PCB performance simulation commercial software to PCB is carried out performance evaluation, the concept of diesel engine electronic control system hardware PCB power supply function model is established, the model parameter class is reasonably divided, then on this basis, the calibration method that can effectively improve model precision is proposed, and the identification method that can verify model precision is correspondingly given.The proposed method breaks through the present situation that simulation precision is difficult to control in the traditional PCB performance evaluation process, and forms a scheme that can guarantee model precision by means of the two main links of calibration and identification.Its contribution lies in establishing the bridge between traditional commercial software simulation and equipment digital prototype construction, and it is an important part of diesel engine electronic control system digital prototype construction.

The invention belongs to the technical field of structural collision safety, and particularly relates to an equivalent static collision stiffness calculation method for structural crashworthiness analysis. According to the method, an external force formula is obtained through a dynamic control equation of structural collision response analysis, then the secant rigidity of the structure is obtained through changes of external force and displacement, therefore, the equivalent static collision rigidity is calculated, and then structural crashworthiness analysis is conducted through set indexes. According to the equivalent static collision rigidity calculation method based on the energy principle and the evaluation index of the equivalent static collision rigidity calculation method, equivalent static collision rigidity calculation and evaluation indexes can be rapidly and directly achieved, and an effective solving method is provided for calculation of structural collision rigidity. Meanwhile, the current commercial software can output the position vector of the node, so that secondary development can be carried out on the basis of the existing large finite element software, and a feasible way is provided for engineering application.

The invention belongs to a data association method, and provides a power transmission channel environment hidden danger satellite patrol result association method and a related device for solving the technical problems of large workload and low accuracy of a hidden danger association method based on commercial software manual marking at present. The method comprises the following steps: acquiring spatial geographic data of a tower point and a power transmission line, defining associated fields between power transmission channel environmental hidden dangers and power grid information, determining filling contents of the associated fields according to the spatial geographic data of the tower point and the power transmission line, and associating the power transmission channel environmental hidden dangers with a satellite patrol result according to the filling contents. The correlation between the power transmission channel environmental hidden danger and the satellite patrol result can be quickly completed, and the patrol operation efficiency is improved.

The application discloses a kind of aero-engine blisk blade repair forming planning methods, to solve the problems of existing blade repair path planning method being imperfect, low degree of automation, poor repair forming quality, the application includes:1. damage identification is carried out using three-dimensional scanner;2. the extraction of camber surface in repair area;3. camber line path planning, deposition parameter setting, welding gun posture planning;4. wire feeding direction control, robot repair path simulation;5. deposition height detection is carried out using displacement sensor.By the repair forming planning method of the application, the automatic repair of the blade can be simply and high-quality realized, the redundant and poor-targeted path planning process of commercial software is avoided, the burden of operator is reduced, and a new forming approach is provided for blisk blade repair.The application belongs to the field of aerospace technology.

The invention provides a software license authorization method and device, equipment and a medium, and the method comprises the steps: generating a blank authorization file, and copying the blank authorization file into a first operation environment; obtaining file creation time, and generating a random timestamp difference; calculating to obtain file starting time; sending the random timestamp difference and the file starting time to an authorization server, and verifying the legality of the operating environment; if yes, the random timestamp difference and the file starting time are stored in a blank authorization file, and a legal authorization file is obtained; and authorization authentication is carried out on the to-be-authorized software. According to the application, the blank authorization file is generated and verified in the first operation environment, the unique authorization fingerprint value is obtained by using the random timestamp difference and the file starting time, and the corresponding relation is established between the value and the authorization code, so that the commercial software is controlled to only operate in the legal operation environment, and illegal abuse is avoided. Meanwhile, the method is widely applicable to various operating environments, and breaks through the limitation of a traditional method on the operating environments.

The invention relates to a novel antenna pattern three-dimensional interaction analysis control. The control comprises a data loading module, a model creating module, a rendering control module, a coordinate system conversion module, a section analysis module, a query labeling module and a data exporting module. The method is realized by adopting Qt 5.15. 2 and VTK 8.2 architectures, antenna test data are converted into a three-dimensional model through a VTK visual pipeline flow, and dynamic section analysis under a Cartesian coordinate system, a cylindrical coordinate system and a polar coordinate system is supported. A user can input coordinates or obtain any tangent plane contour through mouse interaction, AZ plane, EL plane and contour surface projection can be displayed in real time, and the functions of spatial point data query and main lobe labeling are achieved. Self-adaptive adjustment of the interface style is achieved through the QSS style file, the QSS style file is packaged into a DLL file, and an API interface is provided. According to the method, the problems of non-uniform interface style and lack of a three-dimensional model section interactive analysis function of existing commercial software are solved, and the antenna pattern analysis efficiency is improved.

The invention relates to the field of vortex plate stress analysis, in particular to a method for accurately analyzing stress and strain of a vortex plate. The method comprises the following steps: 1, establishing a vortex plate three-dimensional model; 2, performing transient solution on the fluid domain; 3, analyzing a static structure; 4, calculating steady-state heat; and 5, calculating an inertial load, and completing comprehensive stress-strain analysis of one-way coupling. According to the method, a CFD method (computational fluid mechanics) is combined with commercial software, a VLES turbulence model is innovatively introduced, the proportion of turbulence modeling and turbulence analysis can be adaptively adjusted through a resolution control function, the influence of grids on a calculation result can be weakened on the premise of ensuring calculation precision, and calculation resources are greatly saved. According to the method, the flow field distribution of the vortex compression cavity is calculated according to the temperature and the pressure of the vortex tooth surface, so that the load data at the fluid-solid coupling interface is obtained, and compared with a traditional simplified method, the temperature and the pressure of the vortex tooth surface calculated by the CFD method are more consistent with actual conditions, so that the structural strength analysis result is more reliable.

The application relates to the technical field of fluid mechanics, in particular to a slot flow direct numerical simulation method and device, electronic equipment and a storage medium, wherein the method comprises the following steps: constructing a calculation domain reflecting the flow characteristics of slot flow; performing grid division on the calculation domain based on a dimensionless wall distance standard, and setting boundary conditions according to the flow characteristics of the slot flow; based on the divided grid and the boundary conditions, selecting a laminar flow model to perform steady-state calculation, and iterating to convergence to obtain a slot flow laminar flow initial flow field; loading the slot flow laminar flow initial flow field into a transient solver, calling a preset flow disturbance program, superimposing a high-intensity disturbance in the initial stage of transient calculation, so as to realize high-efficiency evolution simulation of the slot flow from laminar flow to fully developed turbulent flow, and output flow field parameters representing the turbulent flow characteristics. Therefore, the problems of low turbulent flow triggering efficiency and poor calculation precision in the near-wall region when a commercial software is used to simulate slot flow in the related art are solved.

The invention discloses a viscoelastic-plastic numerical simulation method, which comprises the following steps of: receiving physical modeling and solving control data of a viscoelastic-plastic material, constructing a convex cone planning model for uniformly describing elastoplasticity, viscoelasticity and friction multi-physical field coupling behaviors according to the physical modeling and solving control data, expressing a plastic yield criterion and a viscous flow law as second-order cone constraints, converting the model into a second-order cone complementary equation; converting the equation into an implicit immobile point iterative equation by adopting a modular system matrix splitting iterative algorithm, performing matrix splitting on a system stiffness matrix, and constructing an iterative solution format with calculation complexity at a quadratic level; and performing iterative calculation to convergence based on the format and the input data, and outputting numerical results of a displacement field, a stress field and a strain field. According to the method, multi-field coupling behaviors are unified to a convex cone planning framework, solving is conducted through an efficient iterative algorithm, the calculation efficiency and stability of large-scale viscoelastic-plastic numerical simulation are improved, and the problem of calculation bottleneck caused by existing commercial software multi-field decoupling and general solver explicit inversion is solved.

The invention discloses a numerical design method for uniform air supply of a porous air supply duct through experimental verification, and relates to the field of numerical design of fluid dynamics. The method comprises the following steps: (1) commercial software modeling of an initial structure, discretization of a calculation area, discretization of a physical model, setting of boundary conditions, and calculation of flow values of all air supply outlets of the initial structure; (2) a semicircular baffle is added to the air outlet holes with the flow lower than the target flow so as to adjust the flow, and the hole diameter of the air outlet holes with the flow higher than the target flow is reduced so as to adjust the flow; (3) the target flow is equal to the product of the hole flow rate and the hole sectional area in the initial structure to determine the diameter of the hole with the hole diameter needing to be reduced; (4) a baffle is only added to the most upstream hole, the structures of other holes are not changed, and the relation between the axial dynamic pressure increase value of the most upstream hole and the height of the baffle is obtained through numerical calculation; (5) determining the baffle height of other holes needing to be added with baffles according to the increasing value of the axial dynamic pressure of the hole and the fitting relation; (6) calculating the flow of each air outlet hole of the new structure; and (7) repeating the steps (2)-(6) until the flow of each hole is uniform. According to the method, under the condition that the overall structure of the porous air supply duct is not changed, the air duct structure enabling the flow of each hole of the porous air supply duct to be uniform can be obtained by using numerical calculation of limited steps.

The application discloses a kind of DWG file batch browsing and structured reading method based on lightweight design engine.The application constructs the complete process of "batch preprocessing-multithreading analysis-structured extraction-cross-platform browsing" by integrating open source DWG analysis technology and lightweight design architecture.The method realizes bottom DWG format analysis based on LibreDWG, generates lightweight intermediate files through redundant data elimination and geometry simplification, realizes efficient processing of batch files by combining multi-thread task scheduling;At the same time, structured data such as layer, entity geometry parameter and text attribute can be automatically extracted and standardized stored;Finally, cross-platform batch browsing of desktop and Web is supported, with interactive functions such as layer control, text search and measurement.The application is independent of commercial CAD software, and the batch processing efficiency is improved by more than 300% compared with traditional solutions, the lightweight file size is reduced by 60%-80%, and can be widely used in engineering design collaboration, BIM data integration, drawing automatic review and other scenes.

This invention belongs to the field of laser processing and numerical simulation, and particularly relates to a finite element modeling and analysis method for nanosecond pulsed laser-impacted target materials. The method includes: establishing and loading a laser heat source model; establishing and meshing a finite element model of the target material; establishing and solving the transient heat conduction equation; multi-period iterative solution and post-processing; model verification and parameter analysis. By establishing a laser heat source model, employing an adaptive mesh refinement strategy optimized for temperature gradients, and combining a transient solution algorithm, this invention significantly improves the prediction accuracy of the spatiotemporal evolution of the target material temperature field under nanosecond pulsed laser irradiation compared to traditional simplified analytical models or general commercial software simulations. This invention can accurately predict the temperature distribution and evolution of the target material under laser irradiation, and has advantages such as high modeling accuracy, good computational efficiency, and wide applicability. It is suitable for engineering applications such as laser processing and damage assessment of optical and composite materials.

The application discloses a kind of based on SUPR model human foot posture detection virtual data set's construction method, comprising: using disclosed SUPR model, human skin map, human shape and posture data, and scene classification picture data set as construction material;Using motion classification and random assignment method generates the foot posture data that conforms to human foot physiological structure and real motion state as construction material;Using commercial software converts SUPR model into editable general 3D skin grid model object;Using prepared material edits model object, builds 3D scene, generates the high-definition RGB picture of edited model foot and the matching 2D bounding box and key point annotation data.The application fills the gap of existing human posture data set in foot posture, greatly simplifies the production process of posture data set on the basis of ensuring availability, reduces the hardware threshold and cost required for dataset production.

The invention discloses a method and device for determining the minimum turning radius, a storage medium and an electronic device, and relates to the field of vehicle maneuvering characteristic calculation.The method comprises the steps that under the condition that a vehicle executes a steering event, steering information of the vehicle is obtained, the steering information at least comprises the maximum inner side turning angle of a front wheel of the vehicle and the maximum outer side turning angle of the front wheel of the vehicle; the correction amount of the steering information is determined according to the maximum inner side rotating angle of the front wheel and the maximum outer side rotating angle of the front wheel, and the steering information is updated according to the correction amount; and determining the minimum turning radius of the vehicle through the updated turning information. Therefore, by the adoption of the technical scheme, the problem that the estimation precision of the minimum turning radius of the vehicle is poor under the condition that commercial software is not used in the related technology is solved, and the estimation precision of the minimum turning radius of the vehicle is improved.

The invention provides a geological reservoir fracture modeling grid cell determination method based on oscillator dynamic energy optimization and high-order interaction, and relates to the field of geology. According to the method, a dynamic energy optimization framework of an Ising machine is introduced into geomechanical modeling through fusion of amplitude dynamics and a high-order interaction model, the defects that in a traditional method, the physical significance of an energy function is fuzzy, and grid size effect correction is insufficient are overcome, and based on the real-value energy function of a complex oscillator variable and gradient descent, the dynamic energy optimization framework of the Ising machine is introduced into geomechanical modeling. Global convergence of mechanical parameters of the fracture network is realized, and the problem of local extremum of a traditional phase model is avoided; the fracture rigidity parameter is converted into a third-order polynomial energy item, and nonlinear characteristics of normal / shear deformation of the fracture surface are accurately described; a three-cycle method and a dynamic energy threshold value are combined, the grid size is synchronously optimized in the position-scale-azimuth dimension, the characterization error of fracture surface density and mechanical parameter anisotropy is reduced, and a standard grid format compatible with commercial software can be directly output.

The invention relates to the technical field of geological exploration, in particular to a crustal stress double-grid processing method, system and equipment and a medium. According to the invention, by establishing a complex fracture geometric structure characterization method, a complex fracture geometric structure grid subdivision method and a fluid-solid coupling double-grid spatial discretization method, fracture data in various commercial software formats can be correctly and efficiently converted into fracture grids in a four-dimensional ground stress model; the accuracy of matrix grid cutting of the crack and the conductivity algorithm and the accuracy of equivalent stiffness calculation of the unit where the crack is located are ensured, and the simulation degree and the solving efficiency of the dual-grid system for solving the four-dimensional ground stress simulation fluid-solid coupling problem are ensured. The four-dimensional crustal stress dynamic evolution simulation coupling grid is adopted, high precision can be achieved, high calculation efficiency is achieved, and industrial application is met.

The invention discloses an automatic modeling method and system for complex terrains and buildings / structures in consideration of surface roughness, and the method is realized based on an open source tool, and comprises the steps: collecting the types of terrains, buildings and roughness, and the actual measurement data of a wind field; automatically processing the topographic data through a script and generating an STL file with a transition section; simplifying the building contour and removing abnormal points by using an RDP algorithm and a standard deviation method; filtering the small building and calculating equivalent roughness; generating a building STL in combination with an open source modeling tool; a roughness surface patch is generated on the basis of the DaviportWieringa classification and the equivalent roughness; fusing the terrain, the building and the roughness surface patch; and in OpenFOAM, accurate binding of roughness and computational grids is realized through grid patch association, and wind field simulation and verification are carried out. According to the method, full-process automation is achieved, the modeling efficiency can be improved, the precision deviation of near-surface wind field simulation is reduced through a double-path roughness processing mechanism, and the problems that a traditional method is time-consuming in modeling, insufficient in precision and dependent on commercial software are effectively solved.

The application relates to an aero-engine thrust bearing multidimensional damage resistance prediction method and device, which comprises the following steps: determining the structural design information of an aero-engine thrust bearing; constructing a thrust bearing three-dimensional digital prototype with geometric feature topography, wherein the thrust bearing three-dimensional digital prototype comprises an inner ring, rotating rolling bodies and a retainer; and on the basis of the thrust bearing three-dimensional digital prototype, the aero-engine thrust bearing is subjected to damage resistance prediction according to the structural design information. The application adopts multiple dimensions to evaluate the design scheme of the bearing, is oriented to engineering design application, and the simulation environment constructed based on bearing special software and commercial software can realize cross-professional integration.

The present application relates to a kind of star-shaped film verification methods for analyzing the center of radiotherapy accelerator, the irradiation film of radiotherapy accelerator is photographed by mobile phone or other equipment;The photo taken is introduced into the star-shaped film analysis of computing analysis unit, in computing analysis unit, in turn, after image calibration, field center line search, the minimum incircle calculation of all field, laser line indication center search and the maximum distance calculation of the center point to all field, the minimum incircle of all isocenter line and the maximum distance of the indication center of laser line to all field center line are output.The proved is the comparable alternative for the commercial software for star-shaped film analysis, while increasing the flexibility of use, reducing the dependence on film processor, scanner, special software.Compared with the current commercial product, it can be used in more hospitals, and is conducive to popularization.It is conducive to improving the accelerator maintenance level of relevant units, and ensuring the treatment effect of patients.

The present invention provides a method and apparatus for numerically simulating the time-varying physical properties of medium- and high-permeability oil reservoirs during waterflooding development. The method and apparatus relate to the technical field of oil extraction and specifically include the following steps: dividing the oil reservoir or reservoir to obtain grid cells; obtaining the formation oil viscosity of the grid cells, the oil-water relative permeability curves at different waterflooding multiples, and the conductivity between adjacent grid cells at the same time step to establish an oil reservoir simulation model; based on the oil reservoir simulation model, obtaining the waterflooding multiple of the grid cells, and obtaining the grid cell permeability, formation oil viscosity, and oil-water relative permeability curve based on the waterflooding multiple of the grid cells. The method and apparatus provided by the present invention can characterize changes in reservoir physical properties caused by long-term waterflooding, alleviating the technical problem of existing commercial software being unable to simulate the time-varying effects of reservoirs, and guiding the development and management of medium- and high-permeability, high-water-content oil reservoirs.

The present invention relates to the technical field of fracture gas invasion research, and in particular discloses a method for studying the laws of gas invasion in fractured formations. By establishing a reservoir deformation model, a fluid flow model, and a fluid-solid cross-coupling model, the numerical form of the mathematical model is derived using the finite element method, and discrete fractures are constructed using MATLAB. Finally, the method is solved using commercial software to obtain the laws of gas invasion in fractured formations. By understanding the characteristics and influencing factors of gas invasion, corresponding measures can be formulated to reduce gas invasion and mitigate the adverse effects on the drilling process and oil and gas field development. By studying gas invasion caused by negative pressure differential drilling, the design and optimization of drilling fluid can be improved to reduce the risk of gas invasion into the wellbore. The discussion of the research results has great significance for actual oilfield development.