27 results about "Fracture plane" patented technology

The invention provides an analysis method and system for dynamic fracture of a quasi-brittle material. The method is used for solving the technical problem that an existing method is insufficient in dynamic fracture capturing capacity in quasi-brittle materials. The method comprises the following steps: constructing a representative volume element RVE of a quasi-brittle material with two embedded fracture planes; a dual-scale model of the RVE is constructed, the dual-scale model comprises a macroscale sub-model and a mesoscale sub-model, and the crack traction force and the displacement jump increment in the mesoscale sub-model meet the rate-dependent cohesive friction law; identifying the parameters of the dual-scale model; and embedding the dual-scale model into finite element software to simulate the dynamic fracture of the quasi-brittle material. The contained mesoscale crack plane has the key characteristics of the dynamic fracture behavior of the quasi-brittle material, and has remarkable advantages compared with a classical empirical model.

The invention provides a shale reservoir hydraulic fracturing wellbore casing deformation risk judgment method which comprises the steps that geological parameters and principal stress of a target area are obtained, and the principal stress comprises horizontal principal stress, maximum principal stress and vertical principal stress. And determining an included angle between the fault plane and the hydraulic fracture plane according to the normal vector of the fault plane and the normal vector of the hydraulic fracture plane. And calculating by substituting the geological parameters, the principal stress and the included angle into an established stress calculation model of the fault plane to obtain shear stress and normal stress of the fault plane in the target area. And calculating by substituting the shear stress and the normal stress into the established displacement component calculation model to obtain the slip component of the fault plane in the target area. And performing safety early warning based on the risk level. The fault slip amount is calculated by accurately identifying the stratum physical property parameters and the fault structure, so that the casing deformation risk is judged.

The invention discloses a fracturing fracture connectivity evaluation method and system based on microseism, and belongs to the technical field of oil and gas field development, and the method comprises the following steps: S1, collecting microseism event data; s2, correcting the space coordinates of the microseism event; s3, clustering, wherein a cluster corresponds to all microseism events of one crack; s4, fitting a crack plane; s5, calculating a shortest distance between fitting fracture planes, a normal vector included angle and an energy average value of all micro-seismic events, and calculating the energy average value of all micro-seismic events as a fractured fracture connectivity evaluation index; s6, constructing a fracturing fracture connectivity evaluation model, and calculating an evaluation result of the fracturing fracture connectivity evaluation model through the fracturing fracture connectivity evaluation indexes; s7, evaluating the fractured fracture connectivity based on an evaluation result of the fractured fracture connectivity evaluation model; according to the method, the evaluation accuracy of the fracture connectivity can be improved.

The invention discloses a fracture network three-dimensional reconstruction and connectivity evaluation method and system based on Monte Carlo simulation, and belongs to the technical field of geotechnical engineering geological exploration and digital rock mass modeling. The method comprises the following steps: firstly, acquiring a two-dimensional fracture image of a drill hole, extracting geometric parameters, and acquiring three-dimensional plane initial parameters through a dimension conversion model; introducing Monte Carlo simulation, extending the deterministic plane model into a probability distribution model, and generating a large number of plane instances; calculating statistical characteristics of distances and included angles between fracture planes, and constructing a connectivity probability mapping function to evaluate a comprehensive connectivity probability; and finally, generating a global uncertainty cloud picture based on analysis results of all fracture pairs to identify a high-uncertainty region, and proposing an optimization and supplementation drilling scheme according to the high-uncertainty region. According to the method, the fracture network is transformed from deterministic reconstruction to probabilistic evaluation, connectivity can be quantified, uncertainty can be visualized, and a scientific basis is provided for engineering exploration decision making.

The invention discloses a syngenetic fracture development area ancient landform recovery method and system, and belongs to the technical field of oil-gas exploration and development. According to the method, syngenetic fracture and horizon are explained by using three-dimensional seismic data, a three-dimensional geological framework model is established by combining the explained syngenetic fracture and horizon data, gridded seismic bedding plane and syngenetic fracture plane polygon data are further obtained, subtraction is performed on top and bottom bedding plane data to obtain the apparent thickness of the stratum, and the thickness of the stratum is calculated. According to the method, inclination angle correction is carried out on the apparent thickness of the stratum to obtain the true thickness of the stratum, abnormal value areas in seismic true thickness data are filtered and removed through syngenetic fracture plane polygons, finally plane interpolation is carried out on the data to obtain an accurate and reliable ancient landform plane graph, and recovery of the true thickness of the stratum on the periphery of the syngenetic fracture is achieved through the process. The method greatly improves the accuracy and precision of ancient landform recovery of the syngenetic fracture massive development region, and is of great significance to fine exploration and development and well location deployment.

The application discloses a kind of based on microseismic crack face construction and seepage evaluation method, belong to geological analysis technical field.Use hydraulic fracturing to the detection area, the microseismic source position identification generated by rock mass rupture;Determine the best fitting crack plane from the clustered microseismic source position, extract the spatial orientation information of hydraulic fracturing induced crack;Reconstruct the spatial distribution range of hydraulic fracturing induced crack in the plane, obtain the induced crack geometry of limited scale;Discretize the geometry of induced crack face, construct a simplified hydraulic fracture plane at the perforation location and discretize, form the crack geometry set containing induced crack and hydraulic fracture;Embed the crack geometry set containing induced crack and hydraulic fracture into the rock geometry model, carry out reservoir seepage simulation under real working conditions, quantitative evaluation.It is simple in steps, convenient to use, and has good imaging effect.

The invention discloses a method for determining strike-slip fracture relative activity intensity based on fracture piece length, and relates to the technical field of tectonic geology. Three-dimensional seismic data of a target strike-slip fracture zone are acquired; performing three-dimensional fine analysis on the strike-slip fault zone according to the three-dimensional seismic data, and identifying all fracture slices; determining the horizon of the strike-slip fracture zone according to the three-dimensional seismic data, and drawing a strike-slip fracture plane distribution diagram according to the horizon; according to the strike-slip fracture plane distribution diagram, numbering all fracture pieces; the lengths of all fracture pieces are measured according to the strike-slip fracture plane distribution diagram, and normalization processing is carried out; drawing a broken line graph according to the number of the fracture piece and the length of the fracture piece after normalization processing; and determining the relative activity intensity of the strike-slip fault zone according to the broken line graph. According to the method, the activity intensity of the strike-slip fracture system is determined by adopting the length of the fracture piece, so that the relative activity intensity of the strike-slip fracture can be accurately judged, the whole method is simple, and the estimation cost is reduced.

The invention discloses a borehole fracture plane feature extraction method, system, equipment and medium, and relates to the technical field of mineral engineering, and the method comprises the steps: collecting and processing a borehole imaging expansion view, and obtaining a binary fracture image; extracting a connected domain of the binarized crack image; the axial coordinate of the mass center of each connected domain is obtained, and the connected domains with the spatial positions within the threshold value are aggregated to serve as fracture instances; taking all pixel points of the actual outer contour of the fracture as observation values, performing preliminary sine curve fitting to obtain an initial curve, calculating distances from all the pixel points in each connected domain to the initial curve, and taking the connected domain with deviation greater than a threshold value as an abnormal block to remove; and carrying out sine curve fitting again by utilizing the pixel points left after elimination, and finally extracting various parameters of the crack instance. According to the method, parameter deviation caused by direct fitting is avoided, and the accuracy and stability of extraction of key geometric parameters such as amplitude and period are remarkably improved.

The invention belongs to the technical field of deep rock mass engineering, and discloses a deep fracture surface reconstruction method based on micro-seismic signals, which comprises the following steps of: denoising and classifying a micro-seismic event to obtain more than one fracture surface point set based on a two-step DBSCAN (Density Based Spatial Clustering of Applications with Noise) algorithm; then, taking the normalized moment magnitude of each micro-seismic event as the weight of the micro-seismic event, and fitting the position of the micro-seismic event in each fracture surface point set by using a weighted least square method; and finally, based on a projection method, determining a fracture surface boundary obtained by fitting, and reconstructing a deep fracture surface. The method is a new method for reconstructing the fracture surface by using the position of the microseism event and the spatial distribution of the moment magnitude, the accuracy and effectiveness of fracture surface reconstruction can be improved, and the calculation cost can be remarkably reduced.

A holding device for a fracturable assembly, which is intended to separate along a fracture plane defined between an upper part and a lower part of the fracturable assembly, comprises at least two protrusions configured to keep the fracturable assembly suspended in a substantially horizontal holding position, the protrusions being intended to be located between the upper part and the lower part, against a peripheral chamfer of the upper part; a support located below and at a distance from the protrusions so as to gravitationally receive the lower part when the fracturable assembly is separated, and to keep it at a distance from the upper part held by the protrusions.

The present application relates to a geological modeling method for a geological feature uncertain reservoir. The method comprises the following steps: identifying uncertainty factors of the geological feature uncertain reservoir; parameterizing the uncertainty factors; determining possible distribution modes of the uncertainty parameters; respectively performing random sampling on each uncertainty parameter under each distribution mode to obtain a plurality of certain parameter combinations; each certain parameter combination corresponds to a certain geological model; predicting the geological feature uncertain reservoir through the certain geological model to obtain a plurality of prediction results; and statistically analyzing the prediction results to evaluate the prediction probability and prediction risk of each certain geological model. The present application provides a plurality of certain reservoir geological models varying with key geological features such as stratigraphic plane, fault plane and fracture plane, can be fitted through production history, can invert all the modeled uncertainty parameters, can reduce model uncertainty, and is more suitable for practical use.

The present application belongs to the technical field of deep rock mass engineering, and discloses a deep fracture surface reconstruction method based on microseismic signals, which comprises the following steps: firstly, based on two-step DBSCAN algorithm, denoising and classification are performed on microseismic events to obtain more than one fracture surface point set; then, the normalized moment magnitude of each microseismic event is taken as the weight of the microseismic event, and the positions of the microseismic events in each fracture surface point set are fitted by using the weighted least squares method; finally, based on the projection method, the fracture surface boundary obtained by fitting is determined, and the deep fracture surface is reconstructed. The present application is a new method for reconstructing the fracture surface by using the spatial distribution of the positions and moment magnitudes of microseismic events, which can not only improve the accuracy and effectiveness of the fracture surface reconstruction, but also significantly reduce the calculation cost.

The invention discloses a shock wave lung injury assessment method based on multi-modal data fusion. The method comprises the following steps: S10, acquiring multi-modal data related to a target object; s20, performing standardized preprocessing on the multi-modal data to form a standardized feature vector; s30, constructing and training a lung injury estimation model, and inputting the standardized feature vector into the trained lung injury estimation model; and S40, based on the trained lung injury estimation model, obtaining an evaluation result of the severity of the lung injury of the target object. According to the method, the occurrence positions of various projects are determined by analyzing drilling data and fracturing data, and fracture plane distribution is obtained; and the actual fracture position is determined through fracture plane distribution and occurrence positions of various projects. The method can effectively solve the problems that a traditional method is low in fracture prediction precision and high in multiplicity of solutions, and the engineering complex event early warning coincidence rate is increased.

The invention discloses a mining-induced fractured rock mass permeability calculation method and system based on a fractal theory, and belongs to the field of mine engineering. The method comprises the following steps: identifying a mining overlying strata fracture network to obtain fracture characteristic parameters; the mining overlying strata fracture network distribution is regarded as conforming to a self-similar fractal rule, and a fracture distribution function is obtained; setting the fracture size as continuous distribution, and calculating fracture fractal parameters according to a fractal geometry basic formula based on a fracture distribution function and fracture characteristic parameters; and calculating the permeability of the fractured rock mass by combining a Kozeny-Carman equation on the basis of the fracture fractal parameters and the fracture plane plate model. The distribution and shape characteristics of fractures are quantitatively described through two different fractal dimensions, the relation between a fracture field and a seepage field can be established through the proposed permeability calculation method, and a given permeability calculation formula is very suitable for research on mining overburden strata fractures and seepage through physical similar simulation or numerical simulation.

The present application belongs to the technical field of determining the evolution period of strike-slip faults in the edge of craton, and particularly relates to a method for determining the evolution period of strike-slip faults in the edge of craton based on multi-source data analysis. Three-dimensional reflection seismic data, well logging data and core samples from multiple wells in the target area are collected, and the core samples are from Sinian, Cambrian, Permian and Triassic strata. The seismic data is interpreted to determine the seismic reflection layer and make a coherent attribute map and a time domain structure map, and the fracture plane distribution characteristics and profile structure style are analyzed. The petrology of the core samples is characterized, including scanning electron microscope observation, energy spectrum testing, cathodoluminescence microscope observation, identification of fracture filling characteristics, cutting relationship and diagenetic mineral filling generation, and fluid inclusion analysis of the fracture filling vein samples.

The invention discloses a deep-buried tunnel stress relieving blasting method and device based on fracture surface reflection, and relates to the technical field of deep-buried tunnel blasting excavation. The method comprises the steps that rock mass stress state parameters and rock strength related to a deep-buried tunnel face are obtained; according to the rock mass stress state parameters and the rock strength, multiple rows of outer side blast holes parallel to the large principal stress direction are formed in the outermost side of the tunnel face, and multiple rows of main blast holes are formed in the middle of the tunnel face; during blasting, the outer side blast hole is firstly detonated to form a fracture surface, and then the main blast hole is detonated; wherein the fracture surface is used for reflecting stress waves generated when the main blast hole is detonated. By adopting the method, the reflection of the stroke stress wave at the formed through fracture surface can be realized, so that the local damage and crushing of the rock mass at the fracture surface are realized, the local bearing capacity of the rock mass is obviously reduced, the local stress concentration degree of the rock mass is reduced, and the accumulated stress of the rock mass is efficiently released.

The invention discloses a plane conversion method taking a crack plane as a reference coordinate system, which comprises the following steps of: determining a crack space coordinate system through a camera attitude when a first crack image is shot, and respectively representing projection point space coordinates corresponding to four vertexes on a camera frame through a space relative relationship between the crack plane and a camera plane; establishing a camera coordinate system, and calculating the spatial relative relationship; substituting the space relative relation into a crack space coordinate system to obtain projection point space coordinates corresponding to the four vertexes; establishing a camera coordinate system for each crack image shot subsequently, calculating the absolute scale of each crack image, and correcting the crack image based on the absolute scale; and splicing the plurality of corrected crack images through feature matching, and converting the crack images into a crack space coordinate system through a relative relation between the spliced crack images. On the basis, plane conversion between the camera coordinate system and the crack plane coordinate system is more efficiently and accurately realized.

The purpose of the present invention is to provide a method for breaking a single crystal substrate in which the occurrence of chipping is reduced. An appropriate embodiment of the present invention relates to a method for breaking a single crystal substrate (1) having a cleavage surface (7) inclined at an off-angle (theta) with respect to a scribe surface (3) and a fracture surface (2), the method comprising the steps of: forming a scribe line (L2) on the scribe surface (3); a step of attaching a dicing tape (9) to the scribe surface (3); a step for inverting the single crystal substrate (1); a step in which a fracture plate (13) is brought into contact along a fracture line (B) located in a direction away from a crossing line (C) at which the cleavage surface (7) and the fracture surface (2) intersect with each other with reference to a reference line (R); and a step for applying an external force from the breaking plate (13) to the broken surface (2) and breaking the single crystal substrate (1) along the cleavage surface (7).

The invention discloses a method for approximately establishing rock attribute evolution in a fracturing range by adopting a distance field. The method comprises the following steps: S1, establishing a fracturing crack plane geometric model and a fracturing influence range three-dimensional geometric model; s2, by taking the fracturing fracture plane geometric model as a data source and the fracturing influence range three-dimensional geometric model as a target source, mapping fracture data into the fracturing influence range three-dimensional geometric model by adopting a generalized stretching method, and meanwhile, setting a grid search method as a nearest point form; s3, calculating a distance field d in a fracturing influence range; s4, calculating a damage coefficient D; s5, according to the relational expression of the Young modulus, the porosity and the damage coefficient, the change conditions of the Young modulus and the porosity within the influence range after fracturing are obtained through calculation, and a rock attribute evolution result within the influence range of fracturing is obtained. According to the method, the characterization method for effectively characterizing the influence of fracturing transformation on the rock related attributes is established by adopting the distance field, and relatively reliable data is provided for follow-up related research simulation.

The invention discloses a multi-data comprehensive analysis fault method and device, a medium and equipment. The method comprises the steps of performing seismic data interpretation processing based on an EMD algorithm and a fracture information enhancement technology, obtaining a fracture plane combination scheme, and improving seismic data fracture identification precision; analyzing the drilling data, and determining rock electricity characteristics of each oil reservoir so as to determine the position of a breakpoint; analyzing the fracturing data, determining occurrence positions of various projects, and obtaining fracture plane distribution; and determining the actual fracture position based on the fracture plane distribution and the occurrence positions of the various projects. According to the method, the occurrence positions of various projects are determined by analyzing drilling data and fracturing data, and fracture plane distribution is obtained; and the actual fracture position is determined through fracture plane distribution and occurrence positions of various projects. The method can effectively solve the problems that a traditional method is low in fracture prediction precision and high in multiplicity of solutions, and the engineering complex event early warning coincidence rate is increased.

The invention provides a multi-information shale oil geological sweet spot fuzzy fusion method. The fusion method comprises the steps of S1, acquiring multi-source information data related to shale oil sweet spot prediction; s2, predicting crack planes of a plurality of azimuth angle sections to obtain a crack prediction result; s3, predicting the shale oil three-dimensional lithofacies to obtain a lithofacies prediction result; s4, according to the fracture prediction result and the lithofacies prediction result, constructing a fuzzy fusion formula based on an improved Sigmod function and a TS function; and S5, calculating a multi-information shale oil geological sweet spot fuzzy fusion result. High-precision prediction and grading evaluation of the shale oil geological dessert are realized, and the reliability of shale oil geological dessert prediction is improved.

The invention relates to a directional perforation-pulsation fracturing cooperative crack control device and a perforation method. The directional perforation-pulsation fracturing cooperative crack control device can achieve cooperative crack control operation of directional perforation and well bottom pulsation fracturing by descending a well once. The device comprises an upper tool connector, a directional perforation assembly, a connecting short section, a pulse generator, a packer assembly and a lower tool connector. The directional perforation assembly comprises an outer shell, a gun barrel, a detonating and detonating system connected with the gun barrel and an orientation measuring and guiding mechanism, a plurality of perforations are formed in the outer shell in the circumferential direction, and perforation channels are matched with a targeted crack plane so that a weak plane zone facilitating crack initiation along the target plane can be constructed near a shaft; the pulse generator comprises a stepping motor, a rotary valve, a frequency converter and a flow stabilizing section. The problems that in the prior art, the shale oil horizontal well crack initiation orientation is difficult to control, the crack form is single, fracturing section transformation is not uniform, and multiple times of tubular column tripping are needed in perforation and fracturing operation are solved.

The invention relates to the technical field of seismic data processing and interpretation, in particular to a processing method for improving hidden strike-slip fracture imaging precision. The processing method comprises the following steps: dividing seismic data of a pre-stack common midpoint (CMP) domain into offset vector slice OVT vector bodies, and extracting OVT vector slices; pre-stack OVT domain five-dimensional regularization is carried out; carrying out OVT domain pre-stack offset to generate an OVT domain offset gather containing azimuth angle and offset distance information; prestack OVT domain migration seismic data of the prestack OVT domain in the vertical fracture direction are preferably selected; and on the basis of the generated vertical strike-slip fracture direction dominant azimuth post-stack data volume, absorption compensation based on a wave equation is adopted to carry out frequency expansion processing, and a dominant frequency band is expanded. According to the processing method for improving the hidden strike-slip fracture imaging precision, the small-fault-distance imaging quality is effectively improved, the interpretability is high, the plane distribution rule and distribution characteristics of the strike-slip fracture are clarified, and the important role of the strike-slip fracture on reservoir control is played.

The invention relates to a leakage pressure prediction method and system for a structural plane development stratum, and belongs to the field of oil-gas exploration and development. The method comprises the following steps: performing borehole coordinate conversion based on formation stress state distribution to obtain well periphery stress distribution under any borehole trajectory; based on the well circumference stress distribution under any well track, the three-direction principal stress of the well wall is obtained; based on the three-direction principal stress of the well wall, the dip angle and the trend of the structural surface, the tensile strength of a base body, the tensile strength of bedding, the fracture toughness at different bedding angles, the shear failure strength of the base body and the shear failure strength of bedding; and obtaining the leakage pressure of matrix tensile failure, the leakage pressure of tensile failure along the bedding surface, the leakage pressure of shear failure along the matrix, the leakage pressure of shear failure along the bedding surface and the leakage pressure of expansion along the crack surface. According to the method, the overall calculation method is reliable, consideration factors are comprehensive, and high practicability is achieved.

The invention discloses a method, a device, equipment and a medium for quantitatively analyzing the complexity of a fracture plane of a petroliferous basin, and relates to the technical field of oil and gas reservoir analysis. Data cleaning and data analysis are carried out on fault coordinate data of the petroliferous basin, numbers are added to all faults, and fault coordinates are obtained; configuring nodes in the initial network diagram to obtain a network diagram, calculating an Euclidean distance between adjacent nodes, and adding the Euclidean distance as a side length to the network diagram; performing first mapping on each fault, calculating the length of each fault in the network diagram after the first mapping, and performing second mapping on each fault; connecting a head node and a tail node in the network diagram after the second mapping to obtain a linear distance, calculating the total length of faults, performing third mapping on each fault to obtain a target network diagram, and visualizing the target network diagram; quantitative analysis of the fracture plane complexity of the petroliferous basin is efficiently and accurately achieved, dynamic changes and plane distribution characteristics of a fault system are comprehensively and visually captured, and quantitative analysis visual display is achieved.

According to the technical scheme, the method comprises the steps that fine structure interpretation is conducted on a fracture, and the same-deposition fracture plane and profile characteristics of the fracture are obtained; determining plane distribution characteristics of the fracture in each stratum by performing depth domain structure interpretation on the plane and profile characteristics of the co-deposition fracture; determining a growth index and a current fault displacement according to the plane distribution characteristics; and based on the growth index and the current fault displacement, carrying out fracture stage-by-stage activity evaluation. According to the scheme, the fracture activity is directly judged by using the multi-point fracture growth index, and compared with a traditional rough judgment method, the fracture activity can be described more accurately, so that the accuracy of fine lithologic oil and gas reservoir evaluation is improved.

The invention provides a method of fabricating a microfluidic chip, the method comprising forming one or more fluidic channels in a first substrate layer, providing a second substrate layer in contact with the first substrate layer, and bonding the first substrate layer and the second substrate layer together to form a wafer, and singulating the wafer to form the microfluidic chip, wherein singulating the wafer to form the microfluidic chip comprises irradiating the wafer with a laser, wherein the laser is focused inside the wafer to generate one or more laser-modified internal regions within the wafer, wherein the one or more laser-modified internal regions extend in a predetermined fracture plane that defines a desired arrangement of outlet surfaces of the microfluidic chip, and applying a mechanical stress to the wafer to cause the wafer to fracture along the predetermined fracture plane.