59 results about "Fluid migration" patented technology

The invention relates to the technical field of mineral resource exploration. The prospecting method, device and equipment based on the multi-source geological relation data and the medium are provided, the method comprises the steps that space-time alignment and standardization processing are conducted on obtained geological historical evolution data, geophysical field data, geochemical migration data and remote sensing alteration information, and a dynamic knowledge graph is generated; performing mineralization stage division processing on the geological historical evolution data to obtain a mineralization stage division result; integrating the fluid migration space-time path network, performing three-dimensional dynamic modeling processing, and generating a staged three-dimensional metallogenic evolution model; extracting a stage-specific geological mark combination from the staged three-dimensional metallogenic evolution model, performing knowledge reasoning processing based on a preset historical ore deposit rule base, and outputting an ore prospecting target region and a metallogenic process constraint basis which meet a preset confidence coefficient condition, so as to improve the precision of a structural model, generate a staged fluid dynamic field, and improve the precision of the metallogenic process. And the target region prediction confidence is enhanced.

The invention discloses an experimental device and method for controlling migration and mineralization of ore-forming fluid in a wrinkle deformation process, and belongs to the technical field of ore deposit geology. The device comprises an ore liquid synthesis unit and a mechanical deformation simulation and mineralization analysis unit. The mechanical deformation simulation unit comprises a box body, an extrusion deformation system, a liquid injection system and a heating temperature control system, and can synchronously realize visual analysis of structure extrusion, fluid injection and mineralization precipitation at high temperature. The experimental method comprises the following steps: firstly, preparing a simulated metallogenic fluid containing FeS2 (pyrite); laying simulated surrounding rock and wrinkles in the box body, arranging a separation layer, and heating; extruding the sand layer and injecting fluid to simulate a mineralization process; and slicing, sampling and analyzing after model consolidation, and establishing a mineralization space distribution model. The device is simple in structure and convenient to operate, the whole process of fold extrusion, crack extension, fluid migration and mineral precipitation can be repeatedly represented, and an experimental basis is provided for hydrothermal deposit mineralization mechanism research and prospecting prediction.

The invention discloses a CO2-EGR visual monitoring method based on nuclear magnetic resonance. The CO2-EGR visual monitoring method aims at solving the problem that dynamic observation of the pore scale gas drive process is insufficient in the traditional technology. Multi-sequence nuclear magnetic resonance monitoring is synchronously executed, a T2 spectrum is obtained through a CPMG sequence to analyze CH4 content changes, a layered T2 spectrum is generated through an SE-SPI sequence to represent axial fluid distribution, a one-dimensional frequency signal is collected based on a GR-HSE sequence to track a displacement leading edge in real time, and fluid migration visualization is achieved in combination with an HSE overall imaging sequence. The system integrates a gas injection unit, a high-pressure-resistant nuclear magnetic holder, a back pressure controller and a data acquisition module, and is hermetically connected through a high-pressure-resistant pipeline to form a closed-loop experiment system. According to the method, displacement front recognition, displacement process in-situ analysis and quantitative characterization of the displacement efficiency in the non-intrusive CO2-EGR process are achieved for the first time, the CO2-EGR visualization bottleneck is broken through, and a scientific basis is provided for optimizing gas injection parameters and improving the natural gas recovery rate and the carbon sequestration efficiency.

The invention discloses a new-type barite deposit mineralization mode construction method based on a same sedimentary fault. The method belongs to the field of geological exploration and mineral resource prediction, and comprises the following steps: analyzing the earth crust cracking activity history of an earthquake-Hangjian broken basin, and recovering a basin'checkerboard 'structure prototype; by means of field geological survey and research, drilling engineering, geophysics, remote sensing geological big data and the like, north-east-east-direction and north-west-direction co-sedimentary fault networks are identified and modeled, and a deep metallogenic fluid rising and jet flow channel is determined; the metallogenic process is concluded into a hydrothermal jet flow stage and an underwater gravity flow deposition stage, deep fluid is revealed to rise, jet flow and precipitate along a fault, and an ore-rich zone of a composite seabed fan body group is formed; and a geochemical prospecting prediction model combining trace element and sulfur isotope characteristics is established. The method systematically clarifies a coupling mechanism of ore control of the same sedimentary fault, ore-forming fluid migration and gravity flow deposition, and provides a theoretical basis and a technical means for prospecting prediction of the barite deposit in the Hendan-Hangjian fault basin.

A composite vessel and fitting for a through-wall penetration having an exposed end grain. The fitting includes a sealing surface arrangement that seals against the composite vessel and prevents leakage of the vessel contents while protecting the end grain from exposure to internal fluid and / or external environment. The fitting includes an outer part, an inner part, and a through-wall part extending between the inner and outer parts across the penetration. An outer seal arrangement includes an outer seal having a first sealing surface that seals against the outer surface of the composite vessel to restrict environmental contaminants migrating to the end grain. An inner seal arrangement includes at least one inner seal having second and third sealing surfaces. The second sealing surface seals against the inner surface of the composite vessel and the third sealing surface seals a leak path or interface between the inner part and through-wall part to restrict internal fluid migrating to the end grain.

The present application relates to geothermal resource development and evaluation technical field, especially to the balanced water and heat type geothermal resource dynamic evaluation method, including: collecting the flow, temperature and pressure data of the produced fluid and the recharging fluid, and carrying out time synchronization, outlier elimination and time series reconstruction processing on the data to form a continuous operation data set; jointly analyzing the time series change of the operation data set, extracting flow response characteristic quantity and heat exchange response characteristic quantity, and dividing the underground heat reservoir into flow and heat storage units according to the similarity of the characteristic quantity; on the scale of the flow and heat storage unit, respectively establishing a flow structure model and a heat exchange structure model, and coupling them, through a unified state variable to describe the corresponding relationship between the fluid migration behavior and the energy transfer behavior, a flow and heat storage dynamic evaluation model is constructed; based on the model, the change of the state variable of each flow and heat storage unit with time during the recharging operation process is calculated, and the dynamic evaluation data is obtained.

The invention discloses an online analysis experiment system for simulating fluid migration and component change under multi-scene multi-medium multi-field coupling, which comprises a model unit and a fluid conveying unit, and the fluid conveying unit injects experiment fluid into the model unit. Each model unit structurally comprises a cylindrical shell with two open ends, a rubber cylinder is arranged in the shell, an annular space between the rubber cylinder and the shell is sealed, experimental fluid can be directly injected into the rubber cylinder, or experimental fluid can be injected into the rubber cylinder after a rock core or a sand filling model is placed, and a plurality of monitoring holes are formed in the side wall of the rubber cylinder at equal intervals. The sampling holes are communicated with the corresponding round pipes on the shell to serve as monitoring channels or sampling holes, and sealing covers or monitoring sensors are selectively installed on the monitoring channels. The experiment system can test and analyze fluid mixing and mixing zone change, displacement migration, component change and other conditions under multi-scene multi-medium multi-field coupling on line, for example, the experiment system is used for oil and gas displacement, gas storage injection and production simulation, underground energy storage and other experiment researches.

The invention discloses a centrifugal test device for the migration research of water-sand mixed fluid, and the device comprises a material source box module which simulates the supply of a water source and a sand source, and carries out the dynamic monitoring of the state of the material source through a water pressure sensor, an earth pressure sensor and a displacement sensor; the sand-bursting channel module is formed by combining a transparent acrylic front plate and an aluminum back plate, and a water pressure sensor and a temperature sensor are embedded in the sand-bursting channel module to simulate the water-sand migration process in fractures with different geometrical shapes; the collecting box module is used for receiving the outflow water-sand mixture, a water pressure sensor is arranged inside to monitor the residual pressure of the outflow end, and a weighing sensor is arranged outside to calculate the fluid mass change of the water-sand mixture in real time in a high-g environment; and the data acquisition module is used for acquiring water pressure, stress, vibration, acceleration and temperature signals and acquiring sand accumulation behaviors and interface flow characteristics through image comparison and analysis. The device is adjustable in channel structure, controllable in hydraulic condition, diversified in monitoring means, high in test precision and suitable for various water inrush and sand inrush disaster mechanism research scenes.

This invention relates to the field of drilling and completion fluid semi-permeable membrane testing technology, specifically a drilling and completion fluid semi-permeable membrane testing device. The device includes a base plate, a vertical plate fixedly connected to the top surface of the base plate, an upstream chamber fixedly connected to the front surface of the vertical plate via a connecting plate, a downstream chamber and an injection cylinder fixedly connected to the top surface of the base plate, and a core holding chamber integrally connected to the top surface of the downstream chamber. The inner bottom surface of the core holding chamber has a through hole. This drilling and completion fluid semi-permeable membrane testing device provides active fixation and circumferential sealing of the core, preventing fluid migration or core displacement under high pressure. It also simulates the high-temperature and high-pressure environment downhole, improving the accuracy of drilling and completion fluid semi-permeable membrane testing.

The invention discloses a coal mining three-dimensional simulation method based on a numerical manifold and a structured grid, and belongs to the field of coal mining three-dimensional simulation. The method comprises the steps that the initial position of a working face is determined, and a field database is collected; performing grid division on the calculation area, and fusing the field database to obtain a grid model fused with the field data; constructing and coupling a grid model of numerical manifold coverage and fusion field data; coupling of fracture mechanical behaviors and seepage is achieved; based on the CPU-GPU heterogeneous parallel structure, solving a three-dimensional stress field, a displacement field and a pore gas pressure field evolved along with time of the current calculation area; and advancing the coal mine working face in the next step until the whole advancing of the working face is completed, and obtaining the stress distribution change, the fluid migration change and the fracture extension change in the whole advancing process of the working face. The method solves the problems that the existing method is difficult to describe the stress accumulation of the initial microfracture with high precision and is difficult to maintain the topological update of contact / separation after fracture.

This invention relates to a method for determining the migration front and damage distance, and a fracturing simulation system, relating to the field of oil and gas field development. The method includes: controlling an injection device to sequentially perform carbon dioxide injection, fracturing fluid injection, and well shut-in operations on a core sample to simulate a carbon dioxide pre-fracturing process; at each stage of the simulation, controlling a monitoring device to acquire fluid migration data of the core sample; determining the location or migration distance of the carbon dioxide migration front within the core sample based on the fluid migration data; acquiring damage response data for multiple core segments within the reservoir section, the damage response data being used to characterize the cumulative damage degree of the core sample caused by the simulation process; determining damage boundary data of the core sample based on the damage response data; and determining damage hysteresis data, used to characterize the spatiotemporal coupling relationship between carbon dioxide migration and core damage, based on the migration front data and the damage boundary data.

The invention relates to the technical field of oil and gas field development engineering, carbon storage engineering, underground hydrogen storage technology, underground fluid seepage mechanical experiment technology and rock core displacement simulation devices, and particularly discloses a variable-diameter rock core displacement simulation device and method for simulating underground fluid migration in a near wellbore area. In order to solve the problem that a traditional equal-diameter rock core displacement device cannot simulate sudden drop of flow velocity and pressure gradient when fluid in a near wellbore zone flows radially, the device adopts a variable-diameter rock core design, the diameter of the variable-diameter rock core is gradually increased in the flowing direction, and a back pressure control system, a confining pressure system and a multi-point pressure measuring structure are matched. Under the fixed injection flow, the cross sectional area of the rock core is increased, so that the Darcy flow velocity and the pressure gradient are suddenly reduced from the injection end to the output end, and the flowing environment of the immediate vicinity of a wellbore is directly reproduced. The device can directly and efficiently simulate and test the phase state behavior, rheological property and seepage law of complex fluid under the condition of sudden change of the flow velocity and pressure gradient in the immediate vicinity of wellbore, and the engineering representativeness of experimental data is remarkably improved.

The utility model discloses an in-situ testing device for gas-liquid two-phase permeability after hydraulic fracturing, and belongs to the field of unconventional oil and gas development engineering. The device comprises a fluid injection system, a sample loading system, a ground stress loading system, a fracturing system, a fluid recovery system and a data acquisition and processing system, the fluid injection system, the sample loading system and the fluid recovery system are sequentially connected, the crustal stress loading system is connected with the sample loading system through a rigid pressure head and applies three-dimensional crustal stress to a test piece, and the fracturing system is connected with the sample loading system through a fracturing pipeline and applies liquid injection pressure to the test piece; the fluid injection system, the ground stress loading system and the fracturing system are respectively in electric signal connection with the data acquisition and processing system through transmission cables. The gas-liquid two-phase permeability testing device can be used for respectively testing the gas-liquid two-phase permeability under the conditions of different lithology, different ground stress, different fracturing parameters and different permeability parameters, and can more truly reflect the gas-liquid two-phase fluid migration condition in the unconventional oil and gas discharge and production stage.

The present disclosure provides a method and system for simulating and predicting sudden water inrush applicable to different geological media, which relates to the technical field of simulating and predicting sudden water inrush, including constructing a medium model based on actual geological conditions and a particle discrete element method; analyzing the force changes of particle contact in the medium model to obtain geometric information of the medium characteristic structure and the connectivity of the medium structure; constructing the topological structure of the medium model through a graph theory pipe network method, and performing fluid mechanics calculations to determine the fluid pressure and flow distribution; introducing a mapping algorithm based on nearest point search and a pressure interpolation method to feed back the fluid pressure and flow distribution information to the medium model, updating the hydraulic conditions in the medium model, and realizing the dynamic coupling of water flow and particle motion in the medium; establishing a coupling feedback mechanism between the medium model and the fluid pressure and flow distribution, updating the interaction between particle motion and fluid migration in real time, and realizing the simulation prediction of sudden water inrush.

The invention belongs to the technical field of oil and gas reservoir development physical simulation, and relates to an experimental device and method for simulating shale fan-shaped well pattern optimization in a high-temperature and high-pressure environment, and the experimental device comprises a high-temperature and high-pressure bin, a heterogeneous semi-cylinder model, a fan-shaped well pattern, a fluid injection assembly, a saturation and pressure monitoring assembly and a temperature control assembly. According to the device, coal oil is pumped into a high-temperature and high-pressure bin through a fluid injection assembly to achieve a high-pressure environment, a fan-shaped well pattern is arranged on a heterogeneous semi-cylinder model, cracks are formed in a horizontal well section, and fluid is injected through a central vertical well section; data are collected in real time through the saturation and pressure monitoring assembly, the high-temperature and high-pressure stratum environment is simulated in combination with the temperature control assembly, and therefore the fan-shaped well pattern spacing, the horizontal section length and the crack number are optimized. According to the invention, the fluid migration rule of the shale reservoir under the complex well pattern structure can be effectively simulated, and an optimization design basis is provided for shale gas development.

This invention belongs to the field of research on the landward distribution boundaries of natural gas hydrates. It discloses a method and system for studying the fate of methane at the landward distribution boundaries of marine natural gas hydrates, including: seismic interpretation and attribute analysis of present-day BSRs; seismic interpretation and attribute extraction of ancient BSRs to calculate their development depths; calculation of the hydrostatic pressure at the time of the ancient BSRs; simulation and prediction of the ancient BSR positions to determine the location of the landward distribution boundaries of the ancient hydrates; demarcation of the main areas of the study area; identification of whether submarine seepage features are present near the landward distribution boundaries of the hydrates, and interpretation of possible vertical and lateral fluid migration pathways and free gas accumulation; determination of the fate of methane at the boundaries and analysis of the main controlling factors; and calculation of the hydrate decomposition zone volume at the landward distribution boundaries of the hydrates based on the positions of the ancient and present BSRs. This invention identifies multiple types of methane fates at the landward distribution boundaries of marine natural gas hydrates, enabling a correct understanding of the environmental impacts of different methane fates and their effects on hydrate reservoirs.

The invention belongs to the technical field of methane leakage risk evaluation, and discloses a mainland edge methane lateral migration path identification and shallow water scaffold area methane leakage risk evaluation method, which innovatively focuses on a brand new process of deepwater area release-lateral migration-shallow water area leakage. By constructing a multi-factor weighted evaluation model for comprehensively evaluating key parameters such as a deepwater area gas source condition, a fluid migration channel, a'source-leakage 'distance and a shallow water area water depth, relatively accurate quantitative evaluation on the potential that methane at different mainland edges in the world finally enters the atmosphere is realized. The method not only effectively solves the long-standing scientific contradiction of how deep water methane affects the atmosphere under the barrier of a huge thick water layer, but also more scientifically and accurately evaluates the climate feedback effect of the natural gas hydrate and the shallow gas reservoir under the global warming background, and provides a brand-new and crucial analysis tool and decision basis.

The application provides a preparation method of a biomimetic microfluidic device for studying fluid migration in carbonate rock micro-nano cracks, comprising the following steps: step one, analyzing and classifying scanning electron microscope images of carbonate rock core slices by a random forest algorithm to generate a chip design drawing; step two, based on the chip design drawing, adopting soft lithography technology, copying crack structures through a photoresist template and polydimethylsiloxane, and bonding with a glass substrate to form a microfluidic chip; step three, injecting a precursor liquid containing calcite nanocrystal seeds into the flow channel of the microfluidic chip, fixing the crystal seeds by ultraviolet irradiation, and realizing calcium carbonate mineral precipitation by injecting a saturated equilibrium liquid to form a biomimetic microfluidic device. The application can be used for coupling research of all fluids and carbonate rock cracks, and provides a method for restoring the structure of carbonate rock cracks to the greatest extent and a method for cloning the properties of rock surfaces.

The present application relates to the technical field of drilling production process, disclose a kind of drilling gas extraction effect real-time evaluation method and system, the method comprises: the fluid flow of target drilling hole, rock mass stress and regional geological structure data are synchronously collected;Based on fault azimuth and fracture density distribution diagram, the space weight distribution matrix of control fluid migration path is generated;Combining rock mass stress data, the permeability evolution model along the radial of drilling hole is constructed;Fluid flow data is input into the model, and the effective extraction coefficient is output by solving the time-varying integral equation of effective extraction radius;According to the matching relationship between the coefficient and the preset threshold, a real-time extraction effect grade signal is generated.The present application realizes the coupling modeling of geological structure heterogeneity and stress dynamic change, solves the problem of static assessment lag, and improves the efficiency of extraction effect feedback.

The invention discloses a fluid migration prediction method and device based on uncertainty constraints, relates to the technical field of data processing, and mainly aims to solve the problems of poor accuracy and effectiveness of existing fluid migration prediction based on uncertainty constraints. Comprising the following steps: acquiring a noisy data set of a medium of the uranium-containing solution migrated underground, and constructing a convective diffusion physical control model for representing the convective diffusion process of the uranium-containing solution; constructing a joint posterior probability model based on the joint posterior distribution of the noisy data set, the physical consistency likelihood item of the convective diffusion physical control model and the physical residual item of the physical information neural network model; and solving the joint posterior probability model based on variational gradient descent to obtain a particle set of posterior distribution, and predicting the noisy data set according to the particle set and the physical information neural network model to obtain a fluid migration prediction result.

The present application relates to a kind of ore-forming fluid transport and accumulation process simulation experimental device and method, belong to deposit geological technical field.The device is used to simulate the migration path of ore-forming fluid in the internal fault fold structure, transport and accumulation process, the spatial distribution of the formation of ore body / mineralized zone and ore-forming characteristics, explore the occurrence regularity of the internal structure system of ore body / mineralized zone, provide theoretical reference for actual ore body mining.Through systematic experimental research, more comprehensive and profound understanding is provided for deposit geological theory research and practical operation.In actual mineral exploration and development, the use of this simulation device helps to analyze and predict favorable exploration targets and target area, and provides more scientific and reliable technical support for mineral exploitation.

This invention relates to the field of computer-aided engineering applications in geological science, and particularly to a three-dimensional simulation method for ore-forming fluids based on multi-field coupling effects. The method includes the following steps: acquiring and calculating critical temperature thresholds based on viscosity-temperature response for grid cells in a three-dimensional geological grid model data, then classifying the grid cell states to obtain grid state labeling data; expanding geological grid attributes based on the grid state labeling data to obtain a viscosity-temperature partitioned grid; constructing a simulation environment using the viscosity-temperature partitioned grid and extracting temperature thresholds to form comprehensive temperature threshold data; detecting state changes in the comprehensive temperature threshold data to obtain state-change cells; and analyzing and recording pulse events in the viscosity-temperature partitioned grid to obtain flow pulse event sequences. This invention, through computer-aided engineering recording of fluid migration phenomena, significantly improves the scientific rigor and accuracy of ore-forming target area prediction.

The invention provides a whole-process simulation method and system for tunnel seepage and water and mud bursting, and the method comprises the steps: building a numerical model containing a tunnel and a fault, and building a solid particle and fluid particle system through meshless particles; a random fracture network is constructed and mapped to solid particles, and attributes are assigned according to fracture filling conditions; calculating particle interaction, introducing a seepage-stress coupling model into a fracture region, and dynamically updating seepage characteristics to simulate implicit seepage; judging damage and fracture of solid particles by using a preset criterion, and representing a cracked block by discrete element particles if the condition is met; calculating contact force between discrete element particles and contact force between discrete element particles and undamaged particles, and simulating movement of fractured rocks; bidirectional fluid-solid coupling is established, and whole-process simulation of seepage inoculation, rock mass fracture and water and mud bursting is achieved through time integration. According to the invention, the strong coupling process of rock mass fracture and large deformation fluid migration is seamlessly simulated through DEM-SPH coupling.

The application discloses a method suitable for judging fluid migration direction of hydrothermal deposit, selects hydrothermal deposits with correlation in a study area; collects hydrothermal mineral samples from each hydrothermal deposit, determines and marks corresponding metallogenic stages of each hydrothermal deposit, divides the hydrothermal deposit into pre-mineralization stage, mineralization stage and post-mineralization stage based on the metallogenic stages; respectively tests stable isotopes of the hydrothermal mineral samples in the pre-mineralization stage, the mineralization stage and the post-mineralization stage, judges mineral stable isotope variation rules corresponding to the hydrothermal mineral samples in different mineralization stages; compares and studies the mineral stable isotope variation rules of the hydrothermal mineral samples in each mineralization stage of two or more hydrothermal deposits, regards a direction in which the mineral stable isotope variation rules of the hydrothermal deposits tend to be consistent as a fluid migration direction; selects another isotope for verification; the application regards the stable isotope variation rule as an effective means for tracing the source of the hydrothermal fluid of the deposit.

Disclosed are a test system and method for determining a fluid migration front based on pulse pressure-enhanced distributed strain, which belong to the technical field of CO2 geological storage and oil and gas resource development. The system includes a CO2 displacement brine unit, an optical fiber sensor, a pulse pressure injection unit, a data acquisition and processing system, and the like. By injecting high-pressure gas into the other side of a core, a large pressure difference is instantaneously generated at a two-phase interface, resulting in significant strain changes. These strain changes are monitored by the optical fiber sensor in real time, and a position of a CO2 / brine migration front is analyzed and determined by a data collecting and processing system.

This invention discloses a method for simulating the migration and dissolution routes of paleoacidic fluids in oil and gas reservoirs, comprising: obtaining a structural map of the top surface of the target reservoir; obtaining a lithofacies distribution map of the top surface of the target reservoir; calculating the physical property data of different lithofacies combinations; combining the obtained lithofacies distribution map of the top surface of the target reservoir and the obtained physical property data of different lithofacies combinations, and using a random interpolation method to obtain a physical property distribution map of the top surface of the target reservoir; constructing a paleoacidic fluid migration potential map by combining the obtained structural map of the top surface of the target reservoir and the obtained physical property distribution map of the top surface of the target reservoir; and using hydrocarbon expulsion and oil and gas migration forces to drive the paleoacidic fluids and conduct paleoacidic fluid migration and dissolution route simulation. This invention effectively solves the shortcomings of existing technologies, has low simulation costs, and comprehensively considers the influence of structure, lithofacies, and fluid potential on fluid migration, improving the simulation effect and accuracy, and is beneficial to research and production applications in the field of oil and gas exploration.

The application discloses a kind of based on CT scanning and mercury injection data fusion core geometry model construction method, it is related to oil and gas field development technical field. Including: by three-dimensional CT scanning and image processing algorithm obtains core pore structure data;Through high-pressure mercury injection experiment obtains core pore throat size distribution data;Innovatively, three-dimensional core pore structure data and core pore throat size distribution data are fused, and pore-throat space mapping network is constructed by graph theory, to construct the core geometry model;And combining optimization algorithm dynamically adjusts pore throat size, verifies the core geometry model constructed.This application breaks through the limitation of traditional single experimental method, solves the problem of insufficient precision of core geometry model construction, and provides high-precision input for numerical simulation of fluid migration law in post-polymer flooding reservoir.The error of fluid flow simulation in COMSOL of the core geometry model constructed and experimental measurement result is controlled within ±5%, which is significantly better than traditional method.

The present application relates to the technical field of coal resource exploration, and particularly relates to a deep coal resource intelligent exploration method based on tectonic stress field, comprising: arranging a detection drill hole in an exploration target area, synchronously collecting five types of parameters of tectonic stress, ground temperature, ground pressure, fluid migration rate and coal porosity by using a deep integrated detection device, and gathering and constructing a multi-field basic data sample library of each parameter; calculating a tectonic stress intensity index based on the multi-field basic data sample library, dividing the exploration target area into a stress concentration area, a transition area and a stable area according to the index, and determining a regulation coefficient of tectonic stress on porosity and fluid migration. In the present application, a multi-field coupling correction model dominated by tectonic stress is constructed, and then the real formation physical property parameters are restored, so that the traditional exploration which mostly uses single physical field detection is improved. Since the nonlinear regulation of tectonic stress on multi-physical field is ignored, the problem that the tectonic coal and gas enrichment area cannot be accurately identified in the deep stress concentration area is caused.

The application discloses a real-time monitoring rock core displacement process test system based on optical fiber sensing and a working method thereof, and belongs to the field of oil and gas resource development and greenhouse gas storage. The test system comprises a visual rock core displacement device, an optical fiber sensing monitoring system, a gas injection system, a liquid injection system, a constant-temperature confining pressure control system, a separation and collection system and a data acquisition and analysis device. The fluid migration interface position, the rock core strain distribution field and the temperature field and the like in the rock core displacement process can be monitored in real time through optical fiber sensing, and a visual calibration method is provided. The application is used for exploring the migration characteristics and mechanism of the fluid in the rock core in the displacement process, capturing the displacement wetting interface, and providing reliable test basis and theoretical analysis for real reservoir gas storage.

The invention provides a deep positioning method and system for a variable-grained rock type niobium-tantalum-rare earth deposit, and relates to the technical field of geological exploration and deposit science. The method comprises the steps that rock samples are collected on the basis of delineation of a favorable mineralization area; carrying out petrology and geochemistry comprehensive analysis on the rock sample to obtain an analysis result; carrying out EBSD analysis on the rock sample to obtain a fluid migration dominant channel direction; based on the fluid migration dominant channel direction, reconstructing fluid evolution historical data controlled by the strain state; the analysis result and fluid evolution historical data are synthesized, and large-scale mineralization conditions caused by a structure-fluid coupling mechanism are determined; and on the basis of large-scale mineralization conditions, a tectonic deformation-fluid pulse-rich mineralization composite mineralization model is constructed, and a deep prospecting target area is delineated. According to the technical scheme, the positioning precision and the prospecting discovery success rate of the deep concealed ore body of the type of ore deposit are remarkably improved.