52 results about "Overburden pressure" patented technology

A pore pressure prediction method for fine-grained hybrid sedimentary rock based on variable P-wave velocity includes: carrying out a P-wave velocity test of rock under different effective stresses, determining a function form of the relationship between acoustic velocity and effective stress, fitting the parameters in the function by optimization, and establishing an evaluation model of effective stress influence term by lithology. According to the measured formation pressure data and the effective stress influence term model, the acoustic velocity background value is deduced, the logging curve is preferred, and the acoustic velocity background value logging evaluation model is established. According to the logging curves of DT and DEN, combined with the lithology identification results, the acoustic velocity background value is calculated, and then the effective stress of the formation is obtained, and then the pore pressure is determined according to the overburden pressure.

The invention relates to the technical field of crustal stress measurement, in particular to a rock core three-dimensional crustal stress measurement system and method based on multi-source data. The method comprises the following steps: acquiring well wall damage information, and identifying a damage type in the well wall damage information; multiple sections of core samples are selected based on the well wall damage information, and overburden pressure parameters are determined based on the multiple sections of core samples; a rock mechanics experiment is conducted on the rock core sample, rock mechanics parameters are generated, and the rock mechanics parameters comprise the Poisson's ratio, the Young modulus, the uniaxial compressive strength value and the tensile strength value. According to the method, the difference value of the maximum stress and the minimum stress is combined with the multi-source coupling constraint principal stress interval, the intersection points are identified through the topological visualization graph, the numerical range of the maximum principal stress and the minimum principal stress can be accurately determined, and then the information of the three-dimensional crustal stress is obtained.

The invention relates to the field of petroleum engineering, and discloses a pore pressure determination method and device, a storage medium and electronic equipment. The method comprises the following steps: determining longitudinal wave time difference and transverse wave time difference of a rock debris sample, respectively performing overburden pressure correction on the longitudinal wave time difference and the transverse wave time difference, and determining a longitudinal wave and transverse wave ratio according to the corrected longitudinal wave time difference and transverse wave time difference; determining the content of each mineral in the rock debris sample and reconstructing the density content and the shale content; according to the density content, the shale content, the longitudinal wave time difference and the transverse wave time difference, the conversion relation between the dynamic and static elastic parameters is determined; determining vertical principal stress according to the density content; determining a relation between a longitudinal-transverse wave ratio and effective stress according to a conversion relation between the dynamic and static elastic parameters and preset static pressure test data; and determining a pore pressure determination model according to the vertical principal stress and the relation between the ratio of the longitudinal wave to the transverse wave and the effective stress. The invention discloses a while-drilling real-time pressure prediction method, and the real-time monitoring effect of the formation pressure is improved.

The present application belongs to the technical field of geotechnical engineering and indoor test, and provides a visual test device and method for interaction between high-pressure rotary jet flow and soft soil, which comprises a detachable model box, a jet medium simulation system, a high-pressure rotary jet flow generation system, an overburden pressure simulation system, a data acquisition system and a tracing system.The test device has the advantages of high visual degree, detachability, easy assembly and easy production.The jet medium simulation system has significant shear thinning characteristics, and has a high degree of reduction of the non-Newtonian fluid properties of cement slurry, which not only overcomes the problem of easy blockage of the pipeline, but also avoids distortion defects.The trajectory of the fluorescent powder particles in the jet medium simulation system can be captured by a high-speed camera under the irradiation of the pulsating laser beam generated by the pulsating laser, so as to accurately reproduce the flow field information of the high-pressure rotary jet flow in the soft soil.

The present invention relates to the technical field of soft soil foundation treatment, and provides a method for constructing a correlation model between the erosion distance of ultra-deep rotary jet in soft foundation and the overburden pressure, including taking in-situ soil samples; processing the retrieved in-situ soil samples to obtain the experimental values and simulation values of the effective cohesion, internal friction angle, and initial elastic modulus of the obtained soil samples; obtaining the optimal mesoscopic parameters according to the relationship between the error value of the simulation value and the experimental value of the soil body and the error requirement value; establishing a plane particle model and a fluid grid model based on the similarity ratio; plotting a scatter diagram of the data points of the ultimate erosion distance of the ultra-deep rotary jet varying with the overburden pressure; fitting the relationship between the ultimate erosion distance of the ultra-deep rotary jet and the overburden pressure by using an inverse proportional function, and substituting the obtained values of the model constants α and β into the inverse proportional function to obtain a quantitative correlation mathematical model characterizing the relationship between the erosion distance of the ultra-deep rotary jet in soft soil foundation and the overburden pressure.

The application provides a calculation method of pore pressure of a tectonic compression formation. The calculation method of pore pressure of the tectonic compression formation comprises the following steps: S1, obtaining a density trend curve, and performing integral calculation on the density trend curve to obtain overburden pressure S V ; S2, determining total porosity POR of the formation based on acoustic logging, density logging, neutron logging or nuclear magnetic resonance logging; S3, analyzing characteristics of a target layer section to determine a tectonic compression coefficient ACm_C of the formation; S4, solving a pore pressure coefficient PP of a mudstone section based on a pore pressure model corrected based on the tectonic compression coefficient ACm_C; S5, determining a relationship between effective stress P eff and biot coefficient α and total porosity POR; and S6, inversely deducing a pore pressure coefficient of a reservoir section according to the relationship between the effective stress P eff and the total porosity POR. The application solves the problem of low calculation accuracy of the pore pressure calculation method in the prior art.

An experimental device for reconstruction and production increase of natural gas hydrate reservoirs includes a simulation test kettle, and a high-pressure sand filling system, a fracture-forming loading system, an overburden pressure loading system, a gas pressurization system, a fracturing system and a data collection system which are respectively connected with the simulation test kettle. A reservoir medium is arranged in the simulation test kettle, the generation of fractures with various fracture widths and / or fracture shapes is simulated in the simulation reaction kettle by the fracture-forming loading system, the reservoir medium is compacted by the high-pressure sand filling system, seabed overburden pressure is simulated for the reservoir medium by the overburden pressure loading system, gas is pressurized and then enters the simulation test kettle, a fracturing fluid or proppant is injected into the simulation reaction kettle by the fracturing system, and experimental data is collected and obtained.

The invention relates to the technical field of deep dynamic disaster control, and discloses an overlying strata low-position pressure relief and high-position filling dynamic disaster coupling control design method which comprises the following steps: dividing strata units of a research area; and a low-position pressure relief model is established, and crustal stress balance calculation is carried out. And deep hole blasting schemes with different blasting parameters are designed, and circulating excavation and balance calculation are conducted on the coal seam till coal seam excavation is completed. Monitoring points are arranged on the overlying strata of the low-position pressure relief model, and a dynamic change curve of rock mass stress and displacement is obtained. And meanwhile, position coordinates of upper and lower rock stratum boundaries of the separation space are screened, and a grouting material unit conforming to the separation space form is generated. Proportional segmentation is carried out according to a grouting area, and different grouting filling rates are set; and designing a grouting material unit, and creating a high-position filling model. And comparing numerical results of different low-position pressure relief models and high-position filling models, carrying out coupling design on the two numerical models, and designing an optimal dynamic disaster coupling control scheme.

The application provides a method for calculating the ground stress based on the whole process formation leak-off test of a directional well, comprising the following steps: performing the whole process formation leak-off test on the target directional well and recording the test data; calculating the horizontal minimum ground stress and the overburden pressure according to the test data of the whole process formation leak-off test and the rock mechanics characteristic parameters of the target directional well; calculating the fracture pressure value under all possible arrangement combinations of the horizontal maximum ground stress and the horizontal minimum ground stress at the well deviation azimuth of the target directional well according to the stress distribution around the well section of the formation leak-off test well and the tensile failure criterion; drawing the contour map of the fracture pressure to establish the ground stress query chart of the target directional well; and querying the horizontal maximum ground stress corresponding to the calculated horizontal minimum ground stress in the ground stress query chart. The application calculates the ground stress based on the test data of the whole process formation leak-off test of the target directional well, and effectively improves the accuracy of the calculation result of the ground stress size.

To provide an ejecta suppression and ground subsidence suppression system of liquefaction ground which confirms that a crushed shell drain composed of a crushed shell suppresses reduction in drainage performance accompanied by mixing of sand compared to a gravel drain, and is effective as a liquefaction countermeasure drain, and in which since the crushed shell is small in dry density and is extremely lightweight compared to a crushed stone, the dead weight in a ground improvement area is small, and the system has an effect for further reducing a ground subsidence amount after liquefaction.SOLUTION: An ejecta suppression and ground subsidence suppression system, ejecta being from an improvement ground surface by earthquake time liquefaction in an improved ground where a crushed shell drain is laid, includes: selecting a crushed shell having such a coefficient of permeability that a seepage pressure by an excess pore water pressure difference of the crushed shell drain laid on the ground is not higher than an effective placement pressure of the crushed shell drain, after liquefaction; laying the crushed shell drain formed of the selected crushed shell; and improving the ground.SELECTED DRAWING: Figure 1

This invention discloses a method and system for intelligently determining critical pressure based on multi-level matching data, comprising the following steps: data acquisition and preprocessing; executing a hierarchical matching strategy according to a preset priority order to select relevant overburden pressure porosity and permeability experimental data points for the target reservoir from a core physical experimental database; pressure-permeability curve fitting; critical pressure determination; and outputting the critical pressure value and related analysis results. This invention significantly improves the efficiency, accuracy, and automation level of critical pressure assessment based on overburden pressure porosity and permeability experimental data, reduces excessive reliance on new, high-cost, long-cycle overburden pressure experiments, and provides more reliable and timely technical support for refined pressure management, reservoir protection strategy formulation, production enhancement measure optimization, and core analysis experimental pressure threshold calculation during oil and gas field development.

The invention belongs to the technical field of geotechnical engineering tests, and particularly relates to a device for testing the growth and frost heaving force evolution process of segregated ice in a low-temperature and low-saturation rock fracture and a use method of the device. According to the technical scheme, the system comprises a temperature gradient generation module, a load application module, a moisture supply module, a test module and a computer system, the temperature gradient generation module is used for controlling temperature change to simulate the temperature gradient of a slope site, and the load application module is used for controlling the loading condition of a preload to simulate the soil covering pressure of the slope site; the moisture supply module is used for supplying moisture, the test module is used for monitoring the surface temperature and frost heaving force of a rock test piece, and the computer system is used for analyzing data and implementing control. The device can refer to the actual environment where the low-saturation fractured rock mass of the cold region slope is located, the rock mechanical characteristics and the slope weakening problem under the conditions of the temperature gradient, different initial saturations and the preload action can be researched, and theoretical support can be provided for cold region mine slope prevention and control.

The present invention provides a method for determining the overburden pressure of a shield tunneling tunnel, which relates to the technical field of overburden pressure determination. The method includes: obtaining a calculation theoretical model corresponding to the overburden of the shield tunneling tunnel; determining the dilatancy mobilization coefficient at different stress levels according to the calculation theoretical model; determining the included angle between the tunnel excavation shear zone and the horizontal direction corresponding to the dilatancy angle at different stress levels according to; determining the calculation formula of the overburden pressure of the tunnel with respect to the soil arch height and the calculation formula of the soil arch height with respect to the ground loss rate according to; according to the calculation formula of the overburden pressure of the tunnel with respect to the soil arch height and the calculation formula of the soil arch height with respect to the ground loss rate, determining the calculation formula of the overburden pressure of the tunnel with respect to the ground loss rate, and further determining the overburden pressure of the shield tunneling tunnel. The method in the present invention comprehensively considers various factors and can accurately determine the overburden pressure of the shield tunneling tunnel.

The invention discloses a gas storage well productivity calculation method in a complex seepage environment, and the method comprises the steps: carrying out a rock core stress sensitivity experiment under multi-cycle injection and production: carrying out the multi-cycle injection and production rock core experiment, and building a stress sensitivity quantitative characterization model considering the effective covering pressure and the cycle round influence; implementing a high-speed injection-production non-darcy flow experiment: carrying out high-speed non-darcy flow experiment on cores with different permeability and porosity, and establishing a quantitative characterization model of a non-darcy flow coefficient; and construction of a gas storage capacity equation: based on the stress sensitivity quantitative characterization model and the quantitative characterization model of the non-darcy flow coefficient, forming the gas storage injection-production capacity equation through seepage field simplification and conformal transformation modeling, simultaneous operation of a gas motion equation and a state equation and construction of an unsteady seepage differential equation. According to the method, the functions of accurately predicting the productivity of the vertical well and the horizontal well of the gas storage and effectively evaluating the injection-production capacity under the multi-period injection-production condition are achieved.

This application discloses a device and method for monitoring the direct burial stability of heating pipelines, which can effectively monitor and provide early warning of the direct burial stability of heating pipelines in real time. The device includes a pipeline installation kit, with one kit installed at each monitoring point of the heating pipeline. Each kit is equipped with a pressure sensor, an inclination sensor, a UWB tag, and a power supply module. The pressure sensor acquires the overburden pressure data at the monitoring point, and the inclination sensor acquires the pipeline inclination data. The UWB tag generates and transmits a UWB signal based on the overburden pressure and inclination data. A UWB base station receives the UWB signals transmitted by adjacent UWB tags, timestamps the UWB signals, and uploads the UWB signals and their timestamps to a cloud platform. The cloud platform is used to analyze and determine the direct burial stability of the heating pipeline based on the data uploaded from multiple UWB base stations.

The present application belongs to the field of oil and gas exploration, and particularly relates to a device and method for determining gas-measured porosity under overburden pressure. The device for determining gas-measured porosity under overburden pressure comprises: a core holder for accommodating a rock sample, a pressure boosting device connected to the core holder to apply overburden pressure to the rock sample, a space-adjustable gas chamber with an internal space volume capable of being adjusted, the space-adjustable gas chamber being connected to the core holder, and a gas measurement system connected to the core holder and the space-adjustable gas chamber to pass in gas with a preset pressure, thereby measuring the porosity of the rock sample. In the present application, during the calibration of the pore volume, the continuous change of the internal space of the space-adjustable gas chamber is used to obtain a pore volume-pressure standard curve with multiple measuring points through a single gas expansion process, thereby avoiding the purpose of calibrating the pore volume by repeatedly loading and unloading the sample in the core holder, and greatly simplifying the steps of calibrating the pore volume.

The present invention discloses an indoor test device for pile-soil interaction under combined cyclic loading, which includes a reaction force system and a model box. The model box is filled with soil and soil physical and mechanical parameter acquisition components. A loading system is arranged on the reaction force system, and the loading system is located above the model box and corresponds to it. The end face of the model box facing the loading system is an open end. One end of the model pile is installed on the loading system, and the model pile is inserted into the soil and placed in the model box. A number of physical and mechanical state acquisition components are arranged inside the pile body of the model pile, and a horizontal displacement meter is arranged on the top of the model pile. The loading system includes a soil overburden pressure loading system, a horizontal loading system, and a pile vertical load loading system. The horizontal loading system has the functions of horizontal cyclic force loading and continuous force loading, and the pile vertical load loading system has the function of applying vertical load to the model pile. This test device can show the responses of the pile and the soil and the interaction law between them under the combined action of horizontal cyclic and vertical loads, can conduct pile-soil interaction tests of different soil properties (including sand and clay) under different initial stress states and different pile foundation forms under different combined loads, so as to explore the bearing performance of the pile and the response law of the soil, etc., and can also intuitively record the deformation characteristics of the pile and the soil during the test.

The present invention discloses a method for calculating the influence of uneven deformation of the bottom soil on the underground flexible pipeline joint, including calculating the overburden pressure F per unit length along the longitudinal direction of the flexible pipeline according to the diameter and burial depth of the flexible pipeline; determining the deformation difference Δ of the soil at the bottom of the flexible pipeline according to the soil spring stiffness of the pipelines at both ends s ; calculating the shear force #imgabs0# and the total rotation angle #imgabs1# of the pipeline joint when the pipeline joint is a moment-release pipeline joint; calculating the shear force #imgabs2# and the joint bending moment #imgabs3# of the pipeline joint when the pipeline joint is a moment-transfer pipeline joint; and judging the service state of the current flexible pipeline according to the above calculated values.

The present application relates to the technical field of oil reservoir fracture attribute description, and particularly relates to a fracture attribute fusion method based on fractured low-permeability oil reservoirs. The method comprises the following steps: establishing a fracture intensity model by combining well data with seismic data, establishing a fracture network model according to the fracture intensity model, obtaining a natural fracture attribute volume, fitting to obtain shear wave time difference data, first establishing a density model, a longitudinal wave model and a shear wave model, then establishing a rock mechanics parameter model, establishing an overburden pressure and pore pressure model according to the overburden pressure and the pore pressure of the overlying strata of a single well, establishing a ground stress model and simulating and calculating artificial fracture attribute data according to the rock mechanics parameter model and the overburden pressure and pore pressure model; fusing the artificial fracture attribute data to the natural fracture attribute volume, obtaining a fused fracture attribute volume and establishing a target geological model, and simulating and calculating fracturing artificial fracture parameters. The method provided by the present application fuses the fracture attributes of natural fractures and artificial fractures, and improves the description accuracy of fracture attributes.

The present invention provides a method, device, storage medium and computer equipment for determining overburden porosity. The method for determining overburden porosity includes the following steps: constructing an overburden porosity model for a target reservoir, wherein the overburden porosity model for the target reservoir is a logarithmic relationship model between the overburden porosity of the target reservoir and the overburden pressure; based on the overburden porosity model for the target reservoir, determining the overburden porosity of the target reservoir according to the overburden pressure and normal pressure porosity of the target reservoir. The present invention provides a method for determining overburden porosity, which can quickly and accurately calculate the overburden porosity of a target reservoir under different pressures, providing a data basis for shale gas reservoir evaluation, and is of great significance for evaluating shale reservoirs and shale oil and gas reserves. It can also be used to determine porosity under overburden conditions in shale gas exploration and development evaluation in southern my country.

The invention discloses an experimental method and device for simulating physical property changes of a gas storage under alternating working conditions. The method comprises the following steps: carrying out a first nuclear magnetic resonance test on a rock sample subjected to saturated water treatment to obtain a T2 spectrum of the rock sample and corresponding pore throat distribution; carrying out a triaxial mechanical experiment on the rock sample, and simulating the stress environment change under the alternating working condition of different operating years; carrying out a stress sensitive experiment on the rock sample after the triaxial mechanical experiment is carried out each time, calculating the overburden pressure permeability of the rock sample under a preset net stress test point, and obtaining a stress sensitive curve; and carrying out a second nuclear magnetic resonance test on the rock sample after the last round of stress sensitive experiment to obtain a T2 spectrum of the rock sample after the stress sensitive experiment and corresponding pore throat distribution. According to the method, stress sensitivity testing of the gas storage in different operation periods is achieved by setting different simulation years, and powerful technical support is provided for scientifically determining the effective gas storage space and the gas injection and production capacity of the gas storage well and achieving good economic benefits.

The application discloses a regionalized method for improving top coal caving rate based on well up and down combined operation, which comprises the following steps: step one, constructing an accurate three-dimensional geological model of the target coal seam roof; step two, constructing a horizontal directional long borehole along the minimum horizontal principal stress direction of the coal seam roof; step three, performing directional sand blasting and tight cutting in the horizontal directional long borehole; step four, performing fracturing construction on the horizontal directional long borehole by well up and down combination; step five, performing directional sand blasting and tight cutting and fracturing construction on all the horizontal directional long boreholes; and step six, mining the bottom coal, and the reformed top coal naturally falls under the overburden pressure, thereby improving the top coal caving rate. The application can inject high-pressure water into the target top coal through the horizontal directional long borehole of the coal seam roof, when the water pressure reaches the coal rock mass cracking pressure, cracks are generated in the coal seam roof and the top coal and are extended, the integrity of the top coal is damaged, and the purposes of weakening the coal rock mass and improving the top coal caving rate are achieved.

The present invention belongs to the technical field of pipeline engineering, and particularly relates to a calculation method for the shear force and rotation angle of a rigid pipeline joint affected by uneven deformation of the bottom soil. First, calculate the overburden pressure per unit length of the rigid pipeline along the longitudinal direction; then calculate the total vertical displacements generated at the joint of the rigid pipelines on both sides respectively; based on the compression deformation stiffness of the rubber gasket at the pipeline joint, calculate the shear force of the pipeline joint; according to the moment balance condition of the pipeline segments on both sides, calculate the rotation angle of the pipeline joint. The method for calculating the shear force and rotation angle of the rigid pipeline joint in the present invention can measure the influence of soil deformation on the pipeline joint, so as to ensure the long-term stability of the pipeline system.

The present application belongs to the technical field of oil and gas production, and relates to a core processing method for simulating a formation fracture network for reservoir damage and protection evaluation, comprising the following steps: preparing a plurality of core columns reflecting the formation composition of the evaluation oil and gas reservoir; taking the prepared core columns, forming forces in the directions of two horizontal principal stresses and overburden pressure on the core columns according to a preset loading mode and interval time, so that the same fracture-microfracture fracture network as the formation rock of the oil and gas reservoir is formed in the core; obtaining a stereogram of the fracture network through digital core scanning, and calculating the fracture degree and high-density mineral data of the fracture body, and establishing the fracture distribution of the core after fracturing, until the fracture degree and high-density mineral data of the core column are consistent with the fracture degree and high-density mineral data of the formation core. The present application can produce a formation rock core consistent with the formation seepage channel, and the established core better simulates the formation condition, and the evaluation result is more reliable.

Disclosed are methods, systems, and computer-readable medium to perform operations for calculating pore pressure in a reservoir, the operations including: receiving input data including: (i) a rock density in the reservoir, (ii) seismic data measured in the reservoir, and (iii) pore pressure measurement data from a Modular Formation Dynamic Tester (MDT); calculating, based on the rock density, an overburden pressure volume of the reservoir; generating, based on the overburden pressure volume, an overburden pressure volume of the reservoir; generating, based on the seismic data, an acoustic impedance volume of the reservoir; generating, based on the effective stress and overburden volumes, an estimated pore pressure volume of the reservoir; and calculating, based on the estimated pore pressure volume, a pore pressure gradient map indicative of the pore pressure in the reservoir.

The invention provides a thin vein foam concrete layered filling method, and relates to the technical field of mining engineering.The thin vein foam concrete layered filling method comprises the steps that a three-dimensional model is constructed by scanning a thin vein area, and the layer height of layered mining is determined according to the ore body thickness, the dip angle and the equipment operation height; after layer-by-layer mining is conducted from the bottom layer, a goaf layer is scanned, and the minimum design strength is calculated on the basis of the overlying stratum pressure and the roof span height ratio; a plurality of matching combinations are generated within the matching range of cement, water, a foaming agent and tailings, the strength is not lower than the design strength as the constraint, the strength is predicted in combination with a deep learning model, and the optimal matching is selected through multi-objective optimization of the unit mass material cost, the strength and the slump; finally, foam concrete filling slurry is prepared according to the optimal proportion and injected into a mining layer, and safe, economical and efficient layered filling mining from bottom to top is achieved.

The invention provides a rock core saturation correction method and device, and the method comprises the steps: firstly, converting the saturation of a rock core on the ground into the saturation of a corresponding stratum according to the overburden pressure pore permeability experimental data of the rock core and the fluid high-pressure physical property experimental data; then, the reservoirs are classified according to the absolute permeability of the rock core, and a diversion rate expression under the reservoir of the current category is determined according to oil-water relative permeability experimental data; according to the diversion rate expression, the saturation of the corresponding stratum is subjected to multi-process inversion to recover the loss amount, so that a saturation correction model is generated; wherein the saturation correction model is used for representing the saturation after loss recovery; and finally, solving the saturation correction model by taking the sum of the oil saturation and the water saturation after loss recovery as 1 as an objective function so as to correct the saturation of the rock core. According to the method, the rock core analysis saturation value can be reasonably corrected, so that the rock core analysis saturation value can directly reflect the fluid distribution condition under the formation condition, and the oiliness of the reservoir is correctly evaluated.

The present application provides a kind of laminated shale bedding seam porosity determination method, the laminated shale bedding seam porosity determination method includes: step 1, selects the laminated shale rock sample of a certain research block, carries out helium hole method porosity determination experiment, obtains the pore volume and porosity of the shale sample as a whole;Step 2, obtain the curve of porosity and permeability with net overburden pressure;Step 3, obtain pore compression coefficient and permeability sensitivity coefficient;Step 4, according to pore compression coefficient and permeability sensitivity coefficient, obtain the pore permeability power index;Step 5, obtain the maximum pore radius value and average pore radius value;Step 6, according to the calculation formula of pore permeability power index, calculate the laminated shale bedding seam porosity value.The laminated shale bedding seam porosity determination method has strong reliability and accuracy, provides effective technical support for laminated shale oilfield resource quantity evaluation and development scheme.

The invention provides a clastic rock reservoir overburden pressure physical property loss evaluation method and device, and the method comprises the steps: classifying cement in a target reservoir according to the sedimentary environment of the target reservoir, and obtaining a cement classification result; obtaining the content of different cement in the cement classification result; screening out a target cement according to the content; and evaluating the overburden pressure physical property loss of the clastic rock reservoir according to the target cement. According to the method, the porosity and permeability under different overburden pressures can be efficiently and accurately obtained in a mode of counting the types and the contents of the cement under the condition that a large-scale drilling column core and a displacement experiment are not carried out, so that the physical property loss rate of the clastic rock reservoir under the overburden pressures is evaluated.

The present application relates to the technical field of ground stress prediction, and particularly relates to a ground stress prediction method, system and device based on pre-stack elastic parameter inversion; the method comprises the following steps: S1, obtaining seismic data, and performing amplitude-preserving denoising processing on the seismic data; S2, solving elastic parameter reflectivity by using Zoeppritz linear equation, wherein the elastic parameter reflectivity comprises a density data body, a P-wave velocity data body and a Poisson's ratio data body; S3, performing denoising operation on the elastic parameter reflectivity; S4, obtaining an overburden pressure data body based on the density data body processed by the denoising operation in the S3 step; S5, obtaining a formation pore pressure data body based on the P-wave velocity data body processed by the denoising operation in the S3 step; S6, obtaining a ground stress prediction value based on the overburden pressure data body, the formation pore pressure data body and the Poisson's ratio data body; the signal-to-noise ratio and the accuracy of the pre-stack seismic inversion result are improved.