65 results about "Tectonic deformation" patented technology

The invention belongs to the technical field of seismic structure models, and discloses a seismic structure model construction method and system, and the method comprises the steps: constructing a database; constructing a three-dimensional digital elevation model; constructing a three-dimensional geological structure model; constructing an earthquake three-dimensional earthquake structure model; constructing a three-dimensional P-wave velocity structure model; and analyzing a pregnancy and earthquake environment. The three-dimensional seismic geologic model of the Changning seismic region is constructed by taking the Changning seismic region in southern Sichuan as a modeling object and integrating superficial geology, landform (DEM), seismic fine positioning data and main fracture distribution, a deep seismic detection result, a two-dimensional seismic reflection profile, drilling data and the like, the spatial distribution and structure of the three-dimensional seismic geologic model are finely determined, and the three-dimensional seismic geologic model of the Changning seismic region is constructed. Analysis of deep and shallow tectonic deformation characteristics and tectonic styles has important guiding significance for discussing the earthquake-pregnancy environment and evaluating the earthquake risk of the deep and shallow tectonic deformation.

The invention discloses a classification method for a bedrock heat storage geothermal field in a broken basin, electronic equipment and a medium. The method comprises the following steps: compiling a geologic section of a trunk of the basin, and identifying a geologic structure type of a geothermal field in the broken basin; establishing a geothermal field geologic model, and compiling an actually measured formation temperature change curve traversing a geothermal field heat storage top surface depth line to obtain a geothermal profile; numerical simulation is carried out on the geothermal field geologic model, and thermophysical parameters are determined; carrying out heat conduction numerical simulation on the geological section of the basin trunk; different geothermal field bed rock heat storage top surface stratum temperatures are determined, and geothermal anomaly is analyzed; and establishing a geothermal field classification system table, making a judgment map, and dividing the type of each geothermal field in the broken basin. According to the method, the tectonic deformation style is introduced into geothermal field type division, so that spatial distribution of heat storage of bedrock of different tectonic zones is distinguished, the heat storage temperature range is effectively predicted, and the quality of geothermal resources and the development prospect of the geothermal resources can be quickly judged.

The invention discloses a dynamic early warning method and system for soft rock tunnel extrusion large deformation catastrophe, and the method comprises the steps: building a soft rock tunnel surface reference model, carrying out the point cloud registration, updating the soft rock tunnel surface model, recognizing a deformation mode, adjusting a deformation mode threshold value, carrying out the apparent dynamic early warning, and carrying out the multi-scale compensation. Constructing a Bayesian catastrophe prediction network based on a control-state coupling mechanism to obtain a large-deformation dynamic catastrophe index, adjusting a threshold value of the large-deformation dynamic catastrophe index to perform internal dynamic early warning, performing multiple regression to obtain a damage mapping relation set, constructing a deformation feature vector, and performing dynamic early warning; and constructing a dangerous event prediction model based on semi-supervised learning, obtaining a dangerous event prediction result in combination with the destruction mapping relation set, and performing event dynamic early warning. The method not only can improve the precision of dynamic early warning of the soft rock tunnel extrusion large deformation catastrophe, but also has good interpretability, and can be directly applied to a dynamic early warning system of the soft rock tunnel extrusion large deformation catastrophe.

The present invention provides a method and system for building a geological model, which solves the problem that most current geological modeling work is guided by the theory of fault-related folds and is mainly carried out for thrust belts developed in thin belts, and is not applicable to the piedmont thrust belts developed in the transition zone. The method for building the geological model includes: selecting a seismic profile, converting the seismic profile into a depth modeling seismic profile; obtaining a surface geological measured profile based on the seismic profile; obtaining a structural modeling interpretation scheme based on the depth modeling seismic profile and the surface geological measured profile; modifying the structural modeling interpretation scheme based on the structural deformation mode to obtain a preliminary interpretation scheme of the modeling seismic profile; and adjusting the preliminary interpretation scheme to obtain a geological model.

The application discloses a tunnel full-face surrounding rock deformation testing method and system, and relates to the technical field of geotechnical engineering, and comprises the following steps: driving a force sensor on a pre-constructed annular guide rail to rotate and position a target test point pair, and applying radial pressure to both ends of the force sensor, wherein the force sensor is arranged radially along the annular guide rail, and error compensation learning is further included after the rotation and positioning; collecting deformation data of the target test point pair, and obtaining a deformation modulus of the target test point pair through data analysis; testing each test point pair on the annular guide rail, constructing a deformation modulus distribution field according to a test result, obtaining a deformation modulus spatial distribution map through optimization correction, and determining a supplementary measurement position. The application is used to solve the problems of low efficiency and insufficient self-adaptation of a traditional tunnel surrounding rock deformation modulus testing method.

The invention discloses an experimental system and method for simulating magma invasion and eruption to reform strata. The system can comprise a sand box, a power supply device and a temperature and pressure device, wherein the power supply device is positioned on the side surface of the sand box and is connected with a side plate of the sand box so as to provide power for simulating deformation for the sand box; an openable window is arranged at the lower part of the sand box, the warm pressing device is positioned below the sand box, and a nozzle of the warm pressing device can extend into the sand box through the window; simulation magma fluid in the temperature and pressure device enters the sand box through the nozzle and the window so as to simulate the transformation effect of magma invasion and eruption on the stratum in the simulation tectonic deformation process. The system can simulate the magma invasion and eruption process, meanwhile, research on magma invasion, eruption and the transformation effect on a pre-existing structure in an overlying stratum can be carried out in the structure deformation process, and then the understanding of magma activity on the transformation effect of an overlying undeformed geologic model, a synchronously deformed geologic model and a deformed geologic model is improved.

The present invention belongs to the field of uranium geological exploration, and specifically discloses a method for evaluating the flow capacity of oxygen-containing uranium-containing water in sandstone-type uranium deposits, comprising: step S101, based on the analysis of structural deformation characteristics, the structural evolution of the structural layer where the uranium reservoir is located is restored; step S102, based on the plane structural map corresponding to each structural deformation period, the ancient burial depth, ancient inclination and ancient migration distance parameters of oxygen-containing uranium-containing water in the uranium reservoir in each geological historical period are obtained; step S103, based on the particle size analysis of the uranium reservoir, the Trask sorting coefficient is obtained; step S104, the flow capacity coefficient of oxygen-containing uranium-containing water in the uranium reservoir is calculated, and the flow capacity of oxygen-containing uranium-containing water in each geological historical period is determined. The present invention can quantitatively evaluate the flow capacity of oxygen-containing uranium-containing water in the uranium mineralization historical period, so as to provide important parameters for evaluating the uranium mineralization potential and favorable area prediction of sandstone-type uranium deposits.

This invention discloses a device and method for testing the extrusion deformation of a centrifuge. A barrier is installed on a base plate, a curved platform is located between two barriers, and a pusher plate is movably installed on the barriers, with a sealed contact between the lower surface of the pusher plate and the curved platform. The curved platform, pusher plate, barriers, and barriers form an extrusion chamber for placing the extrusion model. A power component is fixedly connected to the pusher plate, pushing the pusher plate to extrude the model. The method includes uniformly laying the extrusion model in the extrusion chamber; hoisting the entire device into the centrifuge to conduct a centrifugal extrusion simulation test under hypergravity; and observing the extrusion model to obtain its deformation characteristics. This invention employs a servo motor, reducer, and ball screw transmission method, enabling large-stroke, low-speed, and stable drive of the drive components under hypergravity conditions. It allows real-time observation of the extrusion deformation process of the model and can simulate large-scale spatiotemporal geological extrusion deformation phenomena.

The invention provides a fracture prediction method and device for a shale reservoir. The method comprises the following steps: acquiring a seismic interpretation result of a target shale reservoir; applying a geochemical test analysis method and the seismic interpretation result to determine a key fracture forming period corresponding to the target shale reservoir, and tectonic deformation historical information and rock mechanical parameters of the key fracture forming period; according to the geologic model and rock mechanical parameters of the target shale reservoir in the key fracture forming period, constructing a geomechanical model of the key fracture forming period; and according to the geomechanical model of the key fracture forming period, tectonic deformation historical information and a preset superposition calculation model, fracture parameters of the target shale reservoir in the key fracture forming period are obtained through prediction. According to the invention, the accuracy of crack prediction of the shale reservoir can be improved.

The present invention belongs to the technical field of comprehensive evaluation of reservoir fractures, and discloses a method for comprehensive prediction and evaluation of fractures in thin interbedded tight oil and gas mixed rock reservoirs. Based on the causes of rock fracture, rock formations with similar lithology and physical properties are regarded as separate fracture units, and it is found that the fracture development index is negatively correlated with the thickness of the rock formation, so a lithology thickness evaluation factor (YXHD) is constructed; there are differences in the intensity of fracture formation in different structural areas, so corresponding structural deformation intensity factors (SFD) can be established for different structural areas; finally, considering the distribution of structural principal stress, the law of fracture development near the fault, and the fracture effect area, a fracture fracture intensity factor (FFD) is proposed. Combining three fracture development evaluation indicators, a comprehensive fracture evaluation model is established, and numerical simulation calculations are performed after trend constraints are imposed on the grid of the fracture prediction indicators, forming a comprehensive prediction technology for thin interbedded tight oil reservoir fractures based on the coordinated characterization of internal and external causes of rock fractures, and the prediction results are consistent with the well profile fracture identification rate of 88%.

The invention discloses a multi-scale fracture earthquake comprehensive prediction method and device, electronic equipment and a medium. The method comprises the following steps: predicting a large-scale fault associated fracture according to seismic data; predicting a mesoscale fold longitudinal seam according to the seismic dip angle and azimuth angle information; fourier series expansion is carried out on the Ruger equation, and small-scale interlayer micro-cracks are predicted through a second-order Fourier series coefficient under the credibility constraint; and performing spatial fusion on the multi-scale fractures according to a principal component analysis technology to realize comprehensive prediction of the multi-scale fractures. According to the method, the tight sandstone fracture is divided into three scales, prediction is carried out by utilizing the deconvolution generalized S transform-based frequency division ant body, the tectonic deformation strength attribute and the Fourier series coefficient based on the credibility constraint, and finally fusion is carried out by utilizing the principal component analysis method, so that multi-scale fracture comprehensive prediction is realized, the fracture prediction precision is improved, and the fracture prediction efficiency is improved. And a technical support is provided for exploration of the compact sandstone reservoir.

This invention relates to the field of oil and gas reservoir geological exploration technology, specifically a method for identifying multiple fracture stages in buried hill oil and gas reservoirs based on tectonic stress field evolution. The method includes the following steps: Tectonic evolution history analysis step: Geological data of the target buried hill oil and gas reservoir area are systematically collected. Based on seismic profiles, stratigraphic contact relationships, tectonic deformation characteristics, and chronological data, a comprehensive analysis is conducted to construct a multi-stage tectonic evolution history of the area from the Paleozoic to the Cenozoic, accurately determining the geological age and tectonic nature of each key tectonic event. Compared to existing technologies, this application establishes a quantitative discrimination model based on mechanical principles through paleostress field numerical simulation and quantitative prediction of theoretical fracture parameters. This standardizes and quantifies the fracture stage identification process, significantly reducing the uncertainty caused by human factors, improving the objectivity and repeatability of the discrimination results, and achieving a leap from qualitative analysis to quantitative discrimination.

The application discloses a joint correction method and system of GNSS non-tectonic deformation and a storage medium. The method obtains GNSS pseudo-range and carrier phase observation data and precise orbit, clock error and other precise products, constructs three-component displacement time series caused by non-tidal atmospheric load, non-tidal ocean load and land hydrology load and temperature-driven thermal elastic displacement time series, and unifies to a reference frame and a time system consistent with GNSS solution. The non-tectonic displacement vector is interpolated to the observation epoch by time, converted from the local coordinate system ENU to the geocentric rectangular coordinate system, and projected to the line-of-sight direction of the satellite to the reference point of the station to form an equivalent geometric distance correction term; the correction term is applied to the pseudo-range observation and the carrier phase equivalent meter domain observation in the same domain as the observation, and then GNSS daily arc segment precise solution is performed to output the coordinate time sequence, which is preferably used for precise point positioning integer ambiguity fixing technology.

The invention discloses a basin difference structure deformation ultra-large simulation device and method, and relates to the technical field of basin simulation, the basin difference structure deformation ultra-large simulation device comprises a supporting frame, two basin simulation bearing boxes are horizontally and fixedly assembled on the inner wall of the bottom of the supporting frame, four groups of bearing box force application mechanisms are vertically and fixedly assembled on the supporting frame on the peripheral side of each basin simulation bearing box, and a basin simulation manufacturing mechanism is horizontally and fixedly assembled on the upper end surface of the supporting frame; the two fluid material bearing tanks are arranged in a mirror image mode and are fixedly arranged on the outer sides of the supporting frames on the non-adjacent sides of the two basin simulation bearing boxes respectively; a solid material bearing box and two movable supports are horizontally arranged on the other two sides of the supporting frame respectively, and a high-definition camera is fixedly assembled on each movable support. And stress monitoring equipment is uniformly arranged in the box body. The output ends of the solid material bearing box and the two fluid material bearing tanks are connected to the basin simulation manufacturing mechanism.

The present disclosure relates to the technical field of geological modeling, in particular to a geological modeling method and device for a strike-slip fault zone. The method comprises the following steps: obtaining a top surface image of a model top surface of a strike-slip fault model of the strike-slip fault zone in a process of a structural deformation physical simulation experiment; determining strain characteristic information of an instantaneous shear strain of the strike-slip fault model on the model top surface in the process of the structural deformation physical simulation experiment based on the top surface image; determining structural deformation characteristic information of different structural sections in the strike-slip fault model based on the top surface image and a profile image of the strike-slip fault model; determining physical property parameters of the different structural sections in the strike-slip fault model based on a simulation logging curve and the strain characteristic information of a region where the strike-slip fault zone is located; determining a target profile image from the profile image based on the physical property parameters of the different structural sections in the strike-slip fault model and the structural deformation characteristic information of the different structural sections; and establishing a geological model of the strike-slip fault zone based on the target profile image, thereby realizing geological modeling of the strike-slip fault zone.

The invention discloses a passive rift valley simulation experiment method and device and an experiment device manufacturing method. The device comprises a substrate and at least one layer of brittle material laid on the substrate, the substrate comprises a hard plate and an elastic material which are bonded alternately, and after the substrate is bonded, the substrate is compressed by a set compression distance in the direction perpendicular to the bonding surfaces of the hard plate and the elastic material; the brittle material is laid above the base top face perpendicular to the pasting face. During an experiment, the experiment device is stretched by a preset tension distance; in the stretching process, CT scanning is conducted on the passive rift valley simulation device, fracture characteristic data of the fragile material are analyzed based on CT scanning images at different moments, and geological characteristic parameters in the passive rift valley structure evolution process are obtained through analysis according to the fracture characteristic data. The experimental device can truly reproduce the tectonic deformation evolution process of the passive rift valley, and provides data support for analyzing the formation evolution process of the passive rift valley.

The invention discloses an ancient landform recovery method and device, electronic equipment and a storage medium. The method comprises the following steps: constructing an ancient landform model according to structural feature data and geological data of a target area; controlling the ancient landform model to perform tectonic deformation of at least one deformation stage, and controlling a spraying system of the ancient landform model to perform atmospheric precipitation simulation; and determining an ancient landform map of the target area in at least one deformation stage according to an elevation change scanning result of the ancient landform model during tectonic deformation. By means of the technical scheme, scientific and reasonable recovery of the ancient landform distribution condition is achieved by simulating natural atmospheric precipitation and formation and evolution of rivers and lakes.

The invention discloses an extrusion structure deformation test device and method suitable for a long-arm centrifugal machine. The fences are installed on the bottom plate, the curved table is located between the two fences, the push plate is movably installed on the fences, the lower surface of the push plate is in sealing contact with the curved table, the curved table, the push plate, the baffle and the fences define an extrusion cavity used for containing an extrusion model, and the power assembly is fixedly connected to the push plate and pushes the push plate to move to extrude the extrusion model; the method comprises the following steps: uniformly laying extrusion models in an extrusion chamber; hoisting the whole device into a centrifugal machine, and carrying out a centrifugal extrusion simulation test in a supergravity environment; and observing the extrusion model to obtain deformation characteristics of the extrusion model. By adopting the transmission mode of the servo motor, the speed reducer and the ball screw, the large-stroke, low-speed and stable driving of the driving part in the supergravity environment can be realized, the extrusion structure deformation process of the model can be observed in real time, and the large-temporal-spatial-scale geological extrusion structure deformation phenomenon can be simulated.

The invention belongs to the technical field of tectonic deformation simulation experiments, and discloses a co-sedimentary structure simulation experiment device and a co-sedimentary structure simulation experiment method. The co-sedimentary structure simulation experiment device comprises a sand box, a partition plate and a pushing mechanism. The partition plate is detachably arranged in the sand box and divides the sand box into a first box body and a second box body in the gravity direction, the partition plate is provided with a sand passing part, and the first box body and the second box body are communicated through the sand passing part. The pushing mechanism comprises a first pushing part and a second pushing part, the first pushing part is movably arranged in the sand box, and the second pushing part is arranged on the first pushing part in parallel at an interval and can move together with the first pushing part. And the simulated geological layer is driven by the first pushing piece to form a target simulated recess. And the simulated sedimentary sand can fall into the first box body under the driving of the second pushing piece and is deposited into the target simulated recess. The simulation experiment device for the co-sedimentary structure can better fit the actual environment, the physical simulation experiment of the co-sedimentary structure is realized, and the accuracy of the experiment result is improved.

This disclosure relates to the field of seismic imaging technology, and particularly to a normal fault modeling and seismic imaging method, device, and computer-readable storage medium. The method involves constructing a geological model containing a granular aggregate, setting initial conditions for the geological model based on information about the normal fault, simulating deformation of the geological model based on applied deformation conditions to obtain a dynamic model of the structural deformation of the normal fault, acquiring the volumetric strain distribution characteristics along the fault deformation zone based on the dynamic model, determining the acoustic characteristic parameters corresponding to the dynamic model based on the volumetric strain distribution characteristics, and determining the seismic profile image of the normal fault based on the acoustic characteristic parameters. This allows for the acquisition of seismic profiles of simulated normal faults, thereby enabling further research on seismic wave propagation patterns and imaging characteristics.

The invention relates to the technical field of deformation research of an atomic system, and particularly provides an atomic strain calculation method based on a dynamic neighborhood and a deformation gradient tensor, and the method comprises the steps: determining a region in which atomic strain needs to be calculated; constructing a dynamic field; and constructing a deformation gradient tensor to calculate an atomic strain tensor. The method has the advantages that the accuracy of strain calculation is high, the calculation efficiency is remarkably improved, and the applicability and expansibility are high.

This invention provides a prospecting method for halite-type carnallite, comprising the following steps: 1) Locating the center of potassium salt accumulation through lithofacies paleogeography, mineralogy, and petrology analysis; 2) Analyzing the characteristics of carnallite on well logging curves through geophysical logging and comparison with actual rock cores, summarizing the well logging response characteristics that differ from other lithologies, and establishing a well logging identification model; 3) Utilizing 3D seismic data, obtaining the tectonic deformation and potassium-bearing salt layer distribution characteristics through well-seismic calibration and forward and inverse tectonic evolution analysis; then, based on rock physics testing, seismic attribute analysis, and forward modeling methods; and finally, establishing a seismic inversion framework model under complex tectonic deformation conditions to determine the distribution characteristics of carnallite-bearing salt layers. This invention is rationally conceived and can determine the distribution range of ore bodies through multi-hole logging, 3D seismic analysis, and multiple methods including mineralogy, sedimentology, and geochemistry.

The invention discloses a multi-cycle structure deposition process identification method based on physical simulation of a growth stratum sand box, and relates to the technical field of deposition analysis, geological data of a target area are obtained, and the geological data comprise stratum thickness, sediment type and structure characteristics; based on current stratum thickness equal-proportion conversion, a growth stratum sand box physical model is established. The dynamic coupling relation between tectonic deformation and deposition filling is visually revealed through physical simulation of the growth stratum sand box, so that a researcher can directly observe how the tectonic activity affects the distribution and accumulation mode of sediments and how the deposition action is fed back to act on the tectonic deformation process; the method overcomes the limitation that the traditional geological survey method is difficult to comprehensively reveal the structure-deposition interaction, provides a powerful tool for deeply understanding the multi-cycle structure deposition process, not only enhances the intuition of geology research, but also improves the analysis capability of complex geological phenomena.

The physical simulation experimental device for full-angle superposition deformation of compression-tension and shear disclosed by the present invention relates to the field of structural geology research, and includes an experimental platform and a control mechanism. A support movement mechanism is provided on the experimental platform, a push-pull mechanism is arranged on the support movement mechanism, a shear mechanism is arranged below the push-pull mechanism, and the shear mechanism is rotatably installed on the experimental platform; the control mechanism is electrically connected to the support movement mechanism, the shear mechanism and the push-pull mechanism respectively, and the control mechanism is used to regulate the support movement mechanism and drive the shear mechanism and the push-pull mechanism to move, so as to simulate processes such as tectonic compression, tension, shear, compression-torsion and tension-torsion. The present invention can achieve full-angle superposition between compression-tension deformation and shear deformation, and simulate multi-angle and multi-stage tectonic deformation processes such as compression-torsion and tension-torsion.

The present invention provides an experimental device and an experimental method for simulating multi-stage deformation of an extensional tectonic wedge. The extensional tectonic simulation sandbox of the device includes inclined side plates and a bottom plastic cloth, and the bottom plastic cloth is located above the inclined side plates. A first driving device is connected to the extensional tectonic simulation sandbox. The stretching control device includes a driving module and an adjustable plastic cloth. The driving module is connected to the adjustable plastic cloth, and the adjustable plastic cloth is located on the inclined side plates and the bottom plastic cloth. The experimental material is located on the adjustable plastic cloth and the bottom plastic cloth. By adjusting the movement speeds of the first driving device and the driving module, a speed difference is formed between the bottom plastic cloth and the adjustable plastic cloth, and relative sliding occurs between the bottom plastic cloth and the adjustable plastic cloth, stretching the experimental material to cause it to deform, thereby completing the simulation of multi-stage deformation of the extensional tectonic wedge. The present invention can intuitively understand the superimposed deformation of the experimental material under the action of multi-stage tectonic deformation, and the experimental results are intuitive and accurate.

The present invention discloses a method for judging the deformation properties of ancient structures, and belongs to the technical field of petroleum and natural gas geology. The present invention determines the deformation properties of ancient structures through the change of stratum thickness and structural restoration of two-dimensional seismic profiles; then, the three-dimensional ancient structure morphology is established through the restoration of three-dimensional structural models; the two-dimensional seismic data is returned to determine the reliability of the three-dimensional ancient structure and the distribution of early faults; finally, the morphology and deformation properties of the three-dimensional ancient structure are implemented to support the research on favorable reservoir areas controlled by the ancient structure, and to obtain breakthroughs in oil and gas exploration and development; at the same time, the two-dimensional and three-dimensional seismic data are used in oil and gas exploration to accurately implement the properties and morphology of the ancient structure, so as to advance the work of obtaining favorable reservoir development areas.

The invention relates to a simulation analysis method and device for deformation of a multi-slip-layer structure, and the method comprises the steps: building a slip structure deformation analysis model based on the morphological characteristics and geological recognition of a seismic section structure; the method comprises the following steps: determining the slippage capacity state of a slippage layer according to geological knowledge, enabling target particles of a slippage structure deformation analysis model to passively move, and completing a first process of deformation simulation of a multi-slippage layer complex structure; repeating the step of enabling the target particles of the slip structure deformation analysis model to passively move according to the slip capacity state, and completing the second process of the multi-stage discrete element numerical simulation experiment; analyzing particle states in the first process and the second process to obtain an experimental simulation result; and an experimental simulation result and actual seismic data are interpreted, compared and analyzed, and a matching analysis result of a complex structure genetic mechanism is achieved. Reference significance is provided for the control effect of the slip layer on deformation, and guidance is provided for setting of an explanation scheme of a complex mountain front masking structure.

The invention discloses an EBSD data fusion processing method in geological structure deformation analysis, and relates to the technical field of geological exploration, and the method comprises the steps: collecting EBSD data, geophysical data, geological mapping data and paleo-temperature data of a target region, carrying out the spatial registration and grid processing, and generating a multi-channel data body; the method comprises the steps of processing EBSD data in a multi-channel data volume, calculating microscopic parameters, generating a multi-dimensional data cube, identifying dynamic recrystallization particles and counting particle size distribution based on the EBSD data in the multi-dimensional data cube, and generating a paleo-strain rate field through inversion of a Zener-Hollomon parameter equation by combining paleo-temperature data. According to the method, the tectonic fracture development probability three-dimensional body graph is generated through the elastic-plastic damage mechanical model and is comprehensively compared with original data to complete a geological analysis report, multi-scale and multi-physical-field data fusion and tectonic deformation quantitative analysis from microcosmic to macroscopic are achieved, and the precision and reliability of geological structure analysis are remarkably improved.

The present invention relates to the technical field of structural analysis in oilfield development, and particularly relates to a stress analysis method based on structural deformation, comprising the following steps: S1. Select a profile, and based on the three-dimensional seismic data of the profile, finely interpret the strike-slip fault structure and analyze the geometric shape and structural deformation characteristics; S2. Obtain the line dip angle data and the trace dip angle data of the profile; S3. Calculate the curvature of the formation in combination with the geological background and rock mechanics parameters of the work area to obtain the three-dimensional surface deformation data of the formation; S4. Calculate the tectonic stress field of the formation based on the three-dimensional surface deformation data of the formation; S5. Segmentally describe the stress properties inside the fault-karst body. The present invention can accurately depict the tensile, translational, and compressional-shearing phenomena caused by the superposition of fractures inside the fault-karst body, and can further judge the pull-apart and compressional uplift regions within the same fracture, and is beneficial to the screening of hydrocarbon accumulation sections, which is of great significance for improving the recovery rate of hydrocarbon enrichment units.

The present application provides a kind of quantitative evaluation shale gas preservation condition method, comprising steps 1. Collecting gas sample to be evaluated area and carrying out natural gas component and isotope characteristic analysis.Step 2. Based on the kinetic Rayleigh fractionation model of carbon isotope in kerogen hydrocarbon generation process, the reaction process F of system is determined.Step 3. Determine the isotope fractionation factor ε.Step 4. The prediction of methane generation amount.Step 5. Quantitative characterization of natural gas dissipation efficiency.Step 6. Comprehensive evaluation of shale system preservation condition.The present application perfects the quantitative evaluation method of shale gas preservation condition, helps the comprehensive evaluation of shale preservation condition in complex tectonic deformation area of Sichuan Basin periphery, provides basis for the search of beneficial target area in shale gas exploration, and speeds up the exploration and development process of shale gas reservoir.