78 results about "Capillary pressure" patented technology

The invention relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model. The shale or coal rock gas evaluation method comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of the real gas effect and the effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a relation between capillary pressure and saturation; 7, considering critical desorption pressure; 8, setting boundary conditions of initial conditions; 9, solving a control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history fitting; 12, verifying historical fitting quality; 13, predicting productivity; 14, calculating a gas dynamic output proportion; 15, identifying a fractionation inflection point and gas production mechanism conversion; by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theories, yield prediction of the deep reservoir and quantitative evaluation of the dynamic proportion of produced gas are realized.

The invention belongs to the technical field of oil and gas reservoir engineering and multiphase seepage dynamic monitoring, relates to a characterization method of seepage behaviors of multiphase fluid in a porous medium, and particularly provides a dynamic construction method of a multiphase displacement capillary pressure-saturation relationship based on nuclear magnetic resonance. Comprising the following steps: S1, acquiring a low-field nuclear magnetic resonance relaxation spectrum of a porous medium in a gas-water two-phase displacement process; s2, determining two-phase fluid interfacial tension, a wetting contact angle and a rock surface relaxation rate; s3, determining the dynamic cut-off relaxation time of the displacement stage; s4, calculating equivalent capillary pressure; the residual water saturation is calculated, and the equivalent capillary pressure is the capillary pressure corresponding to the current displacement stage and is used for constructing a capillary pressure-saturation curve. According to the method, the capillary pressure change in the porous medium can be obtained only through spectral analysis without a centrifugal or mercury injection experiment.

The invention discloses a soil or groundwater remediation agent in-situ precise injection and transmission effect evaluation test system, and belongs to the technical field of stratum pollution remediation. The device comprises a stratum simulation assembly, a stratum pressurization assembly and a parameter detection assembly, wherein the stratum simulation assembly comprises an experimental silo for storing a simulated stratum sample; the stratum pressurization assembly is arranged opposite to the experiment silo and can simulate pressure of different stratum depths; the parameter detection assembly comprises a plurality of pressure detection units which are vertically arranged at intervals along the experimental silo, each pressure detection unit comprises a capillary pressure measuring pipe and a plurality of pressure sensors, the capillary pressure measuring pipes are arranged in the radial direction of the experimental silo, and one end of each capillary pressure measuring pipe is communicated with the simulated stratum sample through the experimental silo; and the plurality of pressure sensors are arranged at intervals along the capillary piezometric tube so as to test the osmotic pressure of different positions of the capillary piezometric tube. Laboratory simulation can be carried out on the process of repairing the polluted stratum by the repairing liquid.

The application discloses a reservoir gas-water relative permeability determination method, and relates to the field of reservoir permeability determination. The method comprises the following steps: obtaining a core sample of a target reservoir and determining the geometric size of the core sample; injecting simulated formation water into the core sample until the core sample is saturated, and performing nuclear magnetic scanning to obtain a reference nuclear magnetic signal and an initial porosity distribution; performing a multistage gas injection pressure experiment in an intermittent displacement mode to obtain quasi-steady-state displacement data; constructing a two-phase percolation numerical model with phase permeability curve parameters and capillary pressure curve parameters as to-be-inverted parameters; constructing a target function based on the quasi-steady-state data and performing inversion solving to obtain optimal parameters; and determining the phase permeability curve and the capillary pressure curve based on the optimal parameters. The application obtains the fluid distribution inside the core through nuclear magnetic resonance, obtains quasi-steady-state data in combination with intermittent displacement, and inversely solves the phase permeability and the capillary pressure, so that the problem that the fluid distribution inside the core cannot be accurately reflected and the multi-solution problem cannot be solved is solved, and the influence of the capillary end effect is eliminated.

The invention relates to the technical field of crystal structure prediction, and discloses a quantum algorithm-based energetic CxNyOz crystal structure prediction method, which comprises the following steps of: calculating an evaporation and diffusion dimensionless number and capillary pressure by obtaining surface tension, a contact angle, a geometric feature scale, temperature, partial pressure, a diffusion coefficient and an evaporation rate; establishing a residual solvent mole fraction and solvent chemical potential sequence; constructing a binary layer occupancy model Hamiltonian containing layer occupancy energy, adjacent layer action energy, a capillary pressure volume term and a molecular polarity action term, and obtaining a hierarchical occupancy number by using a quantum approximation optimization algorithm; calculating interlayer respiration and shear frequency and mode volume sensitivity based on a quantum variation algorithm; and finally, the lattice spacing and the prediction result are obtained through cost functional minimization, and accurate prediction and quantitative analysis of the structure of the energetic crystal under the unbalanced desolvation condition are realized.

The utility model relates to heat pipe heat dissipation technical field especially, it relates to a V type metal wire woven net and have the heat pipe of this woven net. Its technical scheme includes: woven net cylinder, metal wire, pipe body and pipe head, the cross section of metal wire is V type design, each metal wire is woven into woven rope, each woven rope is interwoven in warp and weft direction and forms the V type metal wire woven net of plane net shape, V type metal wire woven net is completely rolled and forms woven net cylinder, woven net cylinder is inserted in the pipe shell inner wall of pipe body, woven net cylinder is arranged along the pipe shell axial direction of pipe body, both shape mutually adapts, the opening direction of V type groove on woven net cylinder is towards pipe body inner chamber, to utilize capillary pressure drive working liquid and return flow from condensation section to evaporation section. The utility model through V type cross section metal wire woven net cylinder can keep metal wire woven net lightweight and processing advantage, can improve capillary return flow capacity significantly, reduce flow resistance.

This invention relates to the fields of civil engineering and ecological slope protection, and discloses a prefabricated steel pipe confined concrete lattice beam slope protection structure and construction method. The slope protection structure includes an ecological planting substrate, a lattice framework, a recycled concrete core mixed with special materials, an adaptive capillary pressure relief micro-valve, and a sensing and monitoring unit. The structure, combined with sleeves and sliding wedges at the assembly nodes, converts the water absorption and expansion thrust of the concrete into radial expansion, effectively releasing local deformation caused by slope settlement. Its core function is to utilize the node expansion to deform the alloy ring, opening the pressure relief micro-valve and draining excess water to the ecological substrate. This invention avoids shear stress concentration and utilizes the structure's spontaneous adjustment and pressure relief mechanism to the hydrological environment, solving the problem of sudden stress caused by uneven local water inflow during short-term heavy rainfall, effectively improving the stability and ecological adaptability of the slope protection.

The application discloses a kind of multilayer heterogeneous reservoir percolation simulation analysis methods based on digital core, including obtaining the three-dimensional digital core model of high-permeability reservoir sample, medium-permeability reservoir sample and low-permeability reservoir sample;Get the pore network model after commingling;Based on the pore network model after commingling, simulate oil-water displacement and suction process by percolation theory, calculate the corresponding capillary pressure curve and relative permeability curve, and compare and analyze percolation characteristics.The beneficial effects of the technical scheme proposed in the application include: based on the pore network model after commingling, simulate oil-water displacement and suction process by percolation theory, calculate the corresponding capillary pressure curve and relative permeability curve, and compare and analyze percolation characteristics.Thereby, the multilayer heterogeneous reservoir percolation process can be simulated, and the interlayer interference influence mechanism and residual oil distribution characteristics during multilayer commingling in the reservoir with large differences in low-permeability and heterogeneity can be truly reflected.

This invention discloses a gas-water two-phase flow simulation method based on pore size evolution, belonging to the field of multiphase flow simulation technology. The method includes: discretizing the porous medium into a pore network model composed of pore nodes and connecting throats, and defining geometric parameters for each throat; updating the equivalent radius, cross-sectional area, perimeter, and shape factor of the throat at the next time step based on the pore size evolution equation, and further updating the single-phase fluid conductivity and capillary pressure of the throat at the next time step; solving for the fluid pressure field and flow rate field satisfying the law of mass conservation and Kirchhoff's equations in the pore network model according to the single-phase fluid conductivity and capillary pressure of the throat at the next time step, and advancing the gas-water two-phase interface until the termination condition is met, outputting the simulation results of the gas-water two-phase flow model. This method breaks through the static assumption of fixed pore throat geometry, achieving accurate characterization of the dynamic changes of pore throat structure in real underground environments, thus improving the accuracy of the simulation results.

The invention discloses a method and a system for analyzing a petroleum secondary migration mode. Comprising the following steps: carrying out an indoor physical experiment on to-be-evaluated petroleum to obtain a capillary number index for representing a competitive characteristic between capillary pressure and viscous force and a Bo number index for representing a competitive characteristic between buoyancy and capillary pressure in a secondary migration process of the to-be-evaluated petroleum; according to the ratio of the capillary number index to the Bo number index, determining the main power type of the to-be-evaluated petroleum by using a preset displacement pressure and buoyancy control migration mode identification chart; and determining the fluid secondary migration mode of the to-be-evaluated petroleum according to the main power type. According to the invention, the petroleum secondary migration law under different geological conditions can be analyzed.

The invention relates to a composite admixture for improving the dry shrinkage performance of alkali slag cement, and a preparation method and a use method thereof, and belongs to the technical field of building materials. The composite additive is prepared from the following components in parts by mass: 30 to 50 parts of potassium dodecyl sulfate, 30 to 50 parts of alkali slag, 10 to 20 parts of nano silicon dioxide, 2 to 6 parts of stearic acid and 15 to 25 parts of sodium lignin sulfonate. By reasonably preparing the components in the admixture and using amounts of the components and utilizing the synergistic effect of the components, the internal pore structure of an alkali slag cement test piece is remarkably improved, and the capillary pressure is reduced, so that the drying shrinkage phenomenon is reduced. In addition, the admixture almost has no adverse effect on the mechanical property of an alkali-activated slag cement test piece, the synthesis method is simple and convenient, the raw materials are easy to obtain, and the admixture has good industrial production prospects.

The invention relates to the technical field of functional composite materials, and discloses an anti-adhesion master batch for a biaxially oriented film and a preparation process of the anti-adhesion master batch for the biaxially oriented film, and the preparation process comprises the following steps: pre-mixing mesoporous silica with specific pore diameter, pore volume and particle size with homo-polypropylene particles, feeding into a co-rotating twin-screw extruder provided with a zero-pressure conveying area and a wide-gap kneading block, and extruding to obtain the anti-adhesion master batch for the biaxially oriented film. The melt temperature is controlled to be 230-270, and the rotating speed of a screw is adjusted so that the average retention time of the material can be within the range of 120-150 s. According to the preparation method, the melt viscosity is adjusted and controlled through an infiltration dynamic window, polypropylene chain segments are migrated into silicon dioxide pores through capillary pressure, the infiltration depth is limited, and a radial refractive index gradient transition layer is constructed on the peripheral side of the anti-blocking agent; abrupt change of phase interface refractive index is eliminated, visible light scattering is inhibited, and the technical problem of mutual restriction of anti-adhesion performance and optical transparency is solved.

The invention provides an asphalt pavement pit slot cold patching repairing method, and relates to the technical field of pit slot repairing, and the method comprises the steps: carrying out pit slot space cleaning on a pavement pit slot, carrying out pit slot boundary shaping based on a pit slot space cleaning result, determining a main body pressure bearing area, determining an edge load avoiding area based on the main body pressure bearing area, and carrying out layout adaptation confirmation on the edge load avoiding area. A sacrificial core arrangement position is arranged in an edge load avoiding area on the outer side of a main body pressure bearing area, the sacrificial core arrangement position is communicated with a low-position communication area and a lateral release area in a pit slot, and then a withdrawable sacrificial core is pulled away after a cold patch restoration body reaches an initial stable state, so that a hidden capillary pressure relief channel is formed; therefore, moisture, water vapor pressure and trace free water accumulated in the restoration body can be continuously released outwards, and the problems that after existing pit slot cold repairing, internal water vapor is not prone to being discharged, and stripping and secondary damage are prone to being caused are solved.

The invention relates to the technical field of tight gas reservoir development, and discloses a composition for pickling blockage removal, which is characterized in that the composition for pickling blockage removal comprises acid, a water block removal agent and phosphate, wherein the water lock removing agent comprises a fluorocarbon surfactant, a polyether surfactant and a silicon ion type surfactant. The composition for pickling and blocking removal can efficiently remove a mud cake blocking barrier formed between a tight gas reservoir seepage channel and a shaft, so that the permeability is improved, the water blocking removal agent can interact and synergistically interact, and the capillary pressure of water is greatly reduced; and water blocking damage caused by percolation of drilling fluid and spontaneous imbibition of capillary force of a tight gas reservoir in the drilling process is eliminated.

The application belongs to the field of rock physics and geophysical exploration, and relates to a simulation method for wettability affecting dispersion and attenuation of partially saturated sandstone, which comprises the following steps: S1. establishing a relationship between capillary pressure and water saturation for wettability correction; S2. calculating equivalent pore throat radius and effective permeability according to the relationship between capillary pressure and water saturation; S3. calculating characteristic frequency and complex bulk modulus under different wettability conditions based on a partially saturated patchy medium model; S4. simulating and comparing the characteristics of longitudinal wave velocity and attenuation under different wettability and water saturation conditions, analyzing the modulation law of frequency-dependent acoustic response caused by wettability change, and realizing quantitative characterization of the wettability effect. The step-by-step modeling method proposed in the application, combined with the wettability correction parameter represented by the contact angle, can systematically calculate the continuous coupling process from capillary pressure to equivalent pore throat structure and equivalent permeability to acoustic response, and realize quantitative analysis of the wettability change on the dispersion and attenuation law.

The application belongs to the technical field of heat dissipation devices, and specifically discloses an ultrathin vapor chamber based on a bionic capillary wick, which comprises a lower cover plate, a primary wick, a bionic secondary wick and an upper cover plate. The lower cover plate is provided with a cavity, and the cavity is filled with a liquid working medium; the primary wick is laid on the inner bottom surface of the cavity; the bionic secondary wick is laid on the top surface of the primary wick; and the upper cover plate is connected to the top of the lower cover plate to seal the primary wick and the bionic secondary wick in the cavity of the lower cover plate. The primary wick and the bionic secondary wick are the same or different porous medium structures, and the ultrathin vapor chamber is sequentially divided into an evaporation zone, an adiabatic zone and a condensation zone along the length direction. The application effectively enhances the capillary pressure, improves the liquid return rate and optimizes the condensation heat transfer performance through the synergistic effect of the multi-stage wicks, the zoned design of the superhydrophilic and superhydrophobic structures and the gradient design of the bionic capillary wick, and has the advantages of improving the heat transfer limit and reducing the condensation thermal resistance.

A method for establishing mathematical model of relationship between spontaneous imbibition volume and time of porous medium includes sample pretreatment, fully-saturation and centrifugal experiments and NMR T2 measurement. First, two rock core samples of predetermined size are selected for cleaning and drying. The first rock sample is vacuumed and injected with water to obtain a saturated sample for NMR T2 measurement. Then, spontaneous imbibition experiment is conducted on another sample, and T2 measurements are conducted to obtain the water distribution and migration characteristics during the imbibition process. Next, the calculation of the imbibition permeability, average capillary pressure and surface relaxivity are conducted based on the NMR data obtained from two samples. Finally, substitute these parameters into the Handy relationship to obtain a new NMR-based mathematical spontaneous imbibition model.

This invention discloses a method for predicting the fluid dynamics of a foam rotating packed bed based on a porous media resistance model, relating to the field of gas-liquid mass transfer equipment technology. The invention includes the following steps: constructing a geometric model of the foam rotating packed bed and meshing it; establishing an Eulerian porous media framework; embedding a novel gas-liquid porous media resistance model; coupling three sub-models, including a capillary pressure model, a mechanical dispersion force model, and an effective interface area model; performing CFD simulation settings and solving; and outputting and analyzing the prediction results. The fluid dynamics prediction method for a foam rotating packed bed based on a porous media resistance model proposed in this invention shows good agreement with experimental data on two key flow indicators: gas phase pressure drop and liquid phase holdup. It exhibits significant technical advantages such as high prediction accuracy, high computational efficiency, and a wide range of applicable operating conditions, providing reliable theoretical support and computational tools for the industrial design, performance optimization, and engineering application of foam-packed rotating beds.

A method and system for predicting dynamic two-phase fluid flow in a mixed-wet porous medium by one or more central processing units (CPUs), comprising generating a set of movements of main terminal menisci (MTMs) of a two-phase fluid within a pore network model (PNM) of a porous media sample having a set of pore elements; by generating a pressure field for each of the set of movements of MTMs based on at least an inlet capillary pressure or a set of flow injection boundary conditions; identifying a set of local capillary pressures and a set of arc meniscus (AM) locations based on the pressure field; identifying a set of fluid displacement potentials based on at least the set of local capillary pressures and a set of threshold capillary pressures; and identifying a highest positive fluid displacement potential from a set of fluid displacements.

The invention discloses a composite liquid absorption core of a groove and lattice structure and a preparation method of the composite liquid absorption core, the composite liquid absorption core comprises a metal tube shell substrate and a composite liquid absorption core body, the composite liquid absorption core body comprises the groove, lattice ribs are arranged on the two sides of the groove, and structural units of the lattice ribs are of a cubic frame structure. The lattice ribs and the tube shell metal substrate are integrally formed through an additive manufacturing method. The manufacturing process is simple, by combining the channel structure and the lattice structure, the capillary pressure of the wick is improved, the flowing resistance of liquid backflow is reduced, the permeability is improved, the working performance of the wick is comprehensively improved, and therefore the heat transfer performance of the heat pipe is improved.

The application provides a low-permeability reservoir physical property parameter prediction method and device, which comprises the following steps: classifying the low-permeability reservoir according to the capillary pressure curve characteristics of the coring well; defining a physical property quality index according to the micro-pore structure characteristics of the reservoir; establishing a physical property quality index reservoir classification standard according to the classification and the physical property quality index of the low-permeability reservoir; respectively performing regression on the porosity and the permeability according to the physical property quality index reservoir classification standard, and classifying to establish a reservoir porosity-permeability interpretation model; performing correlation analysis on the physical property quality index and the logging curve, and then performing fitting to establish a physical property quality index interpretation model; and predicting the low-permeability reservoir physical property parameters according to the established reservoir porosity-permeability interpretation model and the physical property quality index interpretation model. The application improves the accuracy of the low-permeability reservoir logging physical property interpretation model, accurately predicts the low-permeability reservoir physical property parameters, and can accurately identify and evaluate the position and range of the low-permeability reservoir favorable reservoir.

This invention belongs to the field of special ceramics preparation technology, and provides a solderless diffusion-welded reaction-sintered silicon carbide special ceramic component and its preparation method. The invention involves mixing silicon carbide, a carbon source, a pore-forming agent, and metallic silicon powder, granulating the mixture, and cold isostatically pressing it to obtain a green body. Microgrooves are then machined on the end face to be welded. Subsequently, a suspension is vacuum impregnated and coated with a suspension containing mesophase carbon microspheres to construct an interface gradient layer. Finally, the component is aligned, assembled, and subjected to axial load, and the process is completed through reaction sintering. This invention utilizes the capillary pressure difference generated by laser microtexturing and pore gradient to induce the directional migration of liquid-phase silicon from the matrix to the interface. Through the in-situ reaction of liquid-phase silicon with the carbon source, a continuous silicon carbide solid-phase network is generated, physically blocking the outward diffusion channels of the liquid-phase silicon, achieving self-locking and densification of the welding interface. Specifically, this invention can be applied to special ceramic products such as ceramic valves and ceramic cylinder valve plates.

This invention discloses a wash-free laparoscopic lens assembly suitable for laparoscopic surgery, including a laparoscopic lens body and a lens cap disposed at the front end of the laparoscopic lens body; the front end of the lens cap has several sets of parallel grids; the grids have several sets of capillary drainage channels penetrating the grids along their length; the outermost width of the capillary drainage channel opening is smaller than the bottom width of the channel; the capillary drainage channel generates capillary pressure at the channel opening through capillary action, sufficient to overcome the surface tension and gravity of the droplets, causing small droplets falling on the grids to be drawn into the capillary drainage channel at the contact point and move inward or towards the confluence point along the capillary drainage channel, and the liquid in the capillary drainage channel is discharged through the drainage channel. By setting the outermost width of the capillary drainage channel opening to a "small outside, large inside" cross-sectional structure that is smaller than the bottom width of the channel, small droplets falling on the grids are automatically drawn into the capillary drainage channel by the capillary pressure and move inward or towards the confluence point along the channel, and are finally discharged through the drainage channel.

Disclosed herein is a method for obtaining depth-variant relative permeability and capillary pressure curves utilizes downhole in-situ logging data and formation testing measurements. The method involves obtaining multi-frequency dielectric data and NMR T2 data under residual water and oil saturation conditions, and obtaining formation testing data from which relative permeability and capillary pressure values are determined. Rock properties related to rock texture and fluid distribution are determined from the obtained multi-frequency dielectric and NMR T2 data. Additional NMR T2 and multi-frequency dielectric data are obtained at various saturation conditions and depths, and data sets are formed based on their possession of similar rock properties. A mathematical function is determined, relating water relative permeability, oil relative permeability, and capillary pressure with water saturation, using the rock properties and formed data sets. Finally, continuous depth-variant relative permeability and capillary pressure curves are generated based on the determined mathematical function.

This application discloses a method for determining the relative permeability of gas and water in reservoirs, relating to the field of reservoir permeability determination. The method includes obtaining core samples from the target reservoir and determining their geometric dimensions; injecting simulated formation water into the core samples until saturation and performing nuclear magnetic resonance (NMR) scanning to obtain a baseline NMR signal and initial porosity distribution; conducting multi-stage gas injection pressure experiments using intermittent displacement to obtain quasi-steady-state displacement data; constructing a two-phase flow numerical model using relative permeability curve parameters and capillary pressure curve parameters as inversion parameters; constructing an objective function based on the quasi-steady-state data and performing inversion to obtain optimal parameters; and determining the relative permeability curve and capillary pressure curve based on the optimal parameters. This application obtains the fluid distribution inside the core through NMR, combines it with intermittent displacement to obtain quasi-steady-state data, and jointly inverts and solves for relative permeability and capillary pressure, solving the problems of inaccurately reflecting the fluid distribution inside the core and the multiple solutions in inversion, and eliminating the influence of capillary end-effects.

The application relates to a shale or coal rock gas evaluation method based on a gas-water two-phase flow isotope fractionation model, which comprises the following steps: 1, collecting data; 2, establishing a gas well model; 3, establishing a control equation set; 4, coupling the influence of real gas effect and effective stress; 5, establishing a gas transmission model and a relative permeability model; 6, establishing a capillary pressure and saturation relationship; 7, considering critical desorption pressure; 8, setting initial conditions and boundary conditions; 9, solving the control equation set; 10, calculating production dynamic parameters and isotope values; 11, performing history matching; 12, verifying the quality of history matching; 13, predicting productivity; 14, calculating gas dynamic output proportion; 15, identifying fractionation inflection points and gas production mechanism conversion; the application realizes the quantitative evaluation of deep reservoir production prediction and output gas dynamic proportion by coupling gas-water two-phase flow, multiple gas transmission mechanisms, stress sensitivity and methane isotope competitive adsorption theory.

The invention relates to the field of home textiles. The self-adaptive heat and humidity management multi-layer structure filling material comprises a close-fitting sweat discharging layer close to a human body, a middle heating layer located in the middle and an outer side heat insulation layer far away from the human body, the capillary pressure of the close-fitting sweat discharging layer is larger than that of the middle heating layer, and the capillary pressure of the middle heating layer is larger than that of the outer side heat insulation layer. The self-adaptive heat and humidity management multi-layer structure filling material prepared by the preparation method of the self-adaptive heat and humidity management multi-layer structure filling material has better moisture permeability on the basis of keeping the heat retention property.

The application relates to the technical field of mine treatment, in particular to a mine environment treatment method and system based on AI virtual simulation technology. The method comprises the following steps: obtaining a dynamic geological parameter set of a target mine; analyzing the dynamic geological parameter set to determine injection data and soil capillary pressure detection data; determining a composite diffusion mode of a treatment agent according to the injection data and the soil capillary pressure detection data; analyzing the composite diffusion mode to determine a space-time evolution law; constructing an AI dynamic simulation model containing a treatment agent penetration feedback mechanism according to the space-time evolution law; based on the AI dynamic simulation model, performing multi-node data growth simulation on a plurality of treatment schemes to generate a treatment effect evolution atlas containing stratum response time-varying characteristics; analyzing the treatment effect evolution atlas to determine the matching degree of the action depth of the treatment agent and the vegetation planting conditions in each treatment scheme; and determining an optimal treatment scheme implementation path according to the matching degree.

This invention discloses a method for evaluating oil saturation based on the self-sealing capacity of tight reservoirs, relating to the field of petroleum exploration and development technology. First, this invention fits an acoustic transit time-depth trend line based on conventional logging data, and uses the Eaton method to calculate the total overpressure and separate hydrocarbon generation pressurization. Second, through high-pressure mercury injection experiments and conversion of charging characteristics, the relationship between pore throat radius and oil saturation is determined. Then, based on the capillary pressure formula and hydrocarbon generation pressurization intensity, the critical charging pore throat radius is determined. Based on mechanical equilibrium relationships, the upper limit of the self-sealing pore throat radius is determined. Finally, the effective reservoir pore throat range is defined, and oil saturation is calculated. This method overcomes the technical shortcomings of traditional methods that neglect the dynamic coupling relationship between hydrocarbon generation pressurization, pore throat charging, and self-sealing capacity during tight oil accumulation, resulting in large evaluation errors.