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41 results about "Anisotropic elasticity" patented technology
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Method and device for the generation and application of anisotropic elastic parameters
ActiveUS6901333B2Electric/magnetic detection for well-loggingSeismic signal processingSeismic waveSeismic to simulation
A method is disclosed for the generation and application of anisotropic elastic parameters. Anisotropic elastic parameters are generated such that, for selected seismic wave and anisotropy types, an approximation to the anisotropic modeling of seismic amplitudes is obtained by the equivalent isotropic modeling with the anisotropic elastic parameters. In seismic modeling, wavelet estimation, seismic interpretation, inversion and the interpretation and analysis of inversion results anisotropy are handled with isotropic methods, when earth elastic parameters utilized in these methods are replaced by the anisotropic elastic parameters.
Owner:GEOSOFTWARE CV
Methods and systems for estimating stress using seismic data
InactiveUS20110182144A1Electric/magnetic detection for well-loggingSeismic signal processingHorizontal stressPrincipal stress
A method for estimating principal stresses of a subterranean formation from seismic data. In one embodiment, rock strength parameters from seismic data of the formation is first determined to calculate the anisotropic elastic properties of the formation. The three principal stresses of the formation: vertical stress, minimum horizontal stress, and maximum horizontal stress, is determined using at least the calculated anisotropic elastic properties and the rock strength parameters of the formation. From the estimated principal stresses, the differential ratio of the maximum and minimum horizontal stresses can be determined to indicate optimal zones for hydraulic fracturing. In another embodiment, a tectonic strain term is introduced to calibrate the estimated principal estimated stress to a known reference point. In yet another embodiment, hoop stress is incorporated to estimate the fracture initiation pressures.
Owner:GRAY FREDERICK D
Predicting anisotropic source rock properties from well data
InactiveUS20130013209A1Electric/magnetic detection for well-loggingEarth material testingAcoustic waveOrganic matter
Method for predicting physical properties of a source rock formation wherein an inclusion-based (103) mathematical rock physics model (101) is constructed that treats organic matter as solid inclusions, solid background, or both, and relates anisotropic elastic and electric properties of source rock to in-situ rock and fluid properties (102). The model is calibrated with well log data and may be used to forward model calculate effective anisotropic elastic (104.1) and electrical (104.2) properties of the source rock formation, or by inversion (441-442) of sonic and resistivity log data to calculate total organic carbon (423) in terms of a difference (421) between elastic and electrical properties of the source rock.
Owner:ZHU YAPING +4
Method and device for the generation and application of anisotropic elastic parameters
ActiveUS20050090986A1Strong amplitudeElectric/magnetic detection for well-loggingSeismic signal processingClassical mechanicsSeismic wave
A method is disclosed for the generation and application of anisotropic elastic parameters. Anisotropic elastic parameters are generated such that, for selected seismic wave and anisotropy types, an approximation to the anisotropic modeling of seismic amplitudes is obtained by the equivalent isotropic modeling with the anisotropic elastic parameters. In seismic modeling, wavelet estimation, seismic interpretation, inversion and the interpretation and analysis of inversion results anisotropy are handled with isotropic methods, when earth elastic parameters utilized in these methods are replaced by the anisotropic elastic parameters.
Owner:GEOSOFTWARE CV
Rock physics model for simulating seismic response in layered fractured rocks
ActiveUS8184502B2Computation using non-denominational number representationAnalogue computers for heat flowS-waveIterative method
Method for modeling anisotropic elastic properties of a subsurface region comprising mixed fractured rocks and other geological bodies. P-wave and fast and slow S-wave logs are obtained, and an anisotropic rock physics model of the subsurface region is developed (21). P- and fast and slow S-wave logs at the well direction are calculated using a rock physics model capable of handling fractures and other geological factors (22). Calculated values are compared to measured values in an iterative model updating process (23). An upscaled ID model is developed by averaging elastic properties in each layer using an upscaling theory capable of handling at least orthorhombic anisotropy (24). The ID model may be used to generate synthetic seismic response for well ties or AVO modeling (25). Further, a method is disclosed for estimating anisotropy parameters from P- and fast / slow S-wave logs from one or more deviated wells.
Owner:EXXONMOBIL UPSTREAM RES CO
3D anisotropic micro seismic interference inverse positioning method and 3D anisotropic micro seismic interference inverse positioning system
InactiveCN105549068AHigh positioning accuracyImprove positioning reliabilitySeismic signal processingWave equationSource function
The invention relates to a 3D anisotropic micro seismic interference inverse positioning method and a 3D anisotropic micro seismic interference inverse positioning system. The method comprises the following steps: (1) building a medium model, and performing grid discretization of the medium model to get multiple grid points; (2) calculating a seismic source function, and calculating the pressure value of each grid point according to the seismic source function; (3) converting a 3D anisotropic elastic wave equation into a propagation equation, and substituting the pressure value of each grid point into the propagation equation for calculation to get the wave field value at each moment; (4) performing interference imaging of all the obtained wave field values to obtain an imaging result; and (5) analyzing the imaging result, and determining the point with the maximum wave field value as the location of the seismic source. Micro seismic positioning is carried out by use of a wave equation-based positioning method which has the advantages of high positioning accuracy and reliability and the like. By adoption of GPU acceleration 3D anisotropic micro seismic inverse positioning, the computation speed is greatly improved, and the computation efficiency is improved.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Azimuthal anisotropic elastic impedance based crack detection method
InactiveCN104005760AImprove noise immunityHigh degree of fitBorehole/well accessoriesWell loggingNumerical models
The invention relates to an azimuthal anisotropic elastic impedance based crack detection method. With a Connolly elastic impedance equation and a Ruger equation serving as the basis, anisotropic elastic impedance and crack parameters and the dominance relation formula between crack density and crack azimuth are deduced. A set of elastic impedance based crack inversion process is established, and anisotropic parameter information is added into inversion well logging constraint. Numerical model testing is performed in the method, the inversion result is roughly identical to the theoretical value, and the inversion density shows high noise immunity. The method has the advantages that anisotropic elastic impedance can be used, the crack density and the crack azimuth are calculated simultaneously, good application effects are provided in actual data, and high practicality is provided.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Estimation of stress and elastic parameters
Various implementations described herein are directed to estimating stresses and elastic parameters in a formation based on seismic data. In one implementation, wide azimuth seismic data may be used to derive anisotropic elastic parameters. Furthermore, stresses may be calculated using a geomechanical earth model, followed by deriving anisotropic elastic parameters based on the calculated stresses. The anisotropic elastic parameters derived from the wide azimuth seismic data may then be used to modify the geomechanical earth model to improve the prediction of drilling parameters.
Owner:WESTERNGECO LLC
A three-dimensional anisotropy elastic wave numerical simulation method and system
The invention relates to a three-dimensional anisotropy elastic wave numerical simulation method and system. The method comprises the following steps: 1, a medium model is established to carry out grid discretization on the medium model to obtain a plurality of grid points; 2, a seismic source function is calculated, and a pressure value at each grid point is calculated according to the seismic source function; 3, a three-dimensional anisotropy elastic wave equation is converted into a propagation equation, and the pressure value at each grid point is taken into the propagation equation as substitutes to conduct calculating to obtain a wave field value at each moment; and 4, according to the wave field value, a calculating area of each grid point is determined; area division is carried out; and data exchange is carried out on divided area boundary data to complete elastic wave numerical simulation. According to the invention, acceleration of three-dimensional elastic wave numerical simulation under a complex medium is realized through utilization of a GPU; a realization scheme of accelerating data transmission through utilization of GPU Direct technology is realized; a large amount of data copying from a CPU to the GPU and from the GPU to the CPU is avoided; and communication bottleneck optimization is realized.
Owner:INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Single piece abdominal support garment
A single piece garment for those having a distended abdomen, said garment extending upwards from the groin to beneath the breasts. The garment comprises an inner layer and an outer layer. The inner layer has several elastomeric fabrics having differing modulus of elasticity. A section beneath the abdomen is formed from an anisotropic elastomeric fabric with a low modulus of elasticity that supports a distended abdomen. Side panels extending upwards from the abdomen across the hips to the lumbar region are made from an isotropic elastomeric fabric having a moderate modulus of elasticity. These connect to a rear panel across the lumbar of an anisotropic elastomeric fabric having a moderate modulus of elasticity. The directionality of the anisotropic elastomeric fabrics is from the abdomen across the hips to the lumbar region. The entire garment has an outer layer of an isotropic elastomeric fabric with a relatively low modulus of elasticity except for an elastomeric fabric across the lumbar region formed from a high modulus anisotropic elastomeric fabric.
Owner:FONG THERESA
Method and device for calculating Rayleigh surface wave dispersion response by forward modeling of wave equation
ActiveCN102749643AExplain correctnessExplain credibilitySeismic signal processingTime domainWave equation
The invention discloses a method and device for calculating Rayleigh surface wave dispersion response by forward modeling of a wave equation. A phase velocity spectrum of a surface wave, namely, the dispersion response of a Rayleigh surface wave in a frequency domain, is calculated by adopting high-precision higher-order finite difference, rationally setting boundary conditions of a free surface, effectively suppressing false reflection of an external boundary of a model and adopting a Radon transformation method. According to the method and the device disclosed by the invention, Rayleigh surface wave dispersion response characteristics are calculated by forward modeling simulation of finite time-domain difference based on an anisotropic elastic wave equation, wherein the geological model can be an anisotropic and non-horizontal layered medium, and the free surface can be a freely-fluctuated surface. The method and the device can be used for researching the Rayleigh surface wave dispersion response characteristics of complex media.
Owner:PETROCHINA CO LTD
Preparation method and application of anisotropic elastic auxetic fabric
ActiveCN108688138AMore performanceVersatilityAdditive manufacturing apparatusDomestic articlesDimensional modelingEngineering
The invention relates to a preparation method and application of anisotropic elastic auxetic fabric. The preparation method adopts three-dimensional modeling software to model and introduce the modelinto a 3D printer which can print out bi-component materials, and the 3D printer prints an auxetic fabric which is softer and more elastic in the lateral direction than the longitudinal material. Theprepared anisotropic elastic auxetic fabric can be used as clothing, backpacks, masks, artificial blood vessels, filter materials and the like. The preparation method has the characteristics of convenient processing, integrated molding and good material cohesiveness, and extensive available raw materials.
Owner:DONGHUA UNIV
Rock mass engineering parameter calculation method and system based on statistical rock mass mechanics
InactiveCN107832513AGuaranteed reliabilityFully reflect the directional characteristicsEarth material testingDesign optimisation/simulationEngineering design processField tests
The invention discloses a rock mass engineering parameter calculation method and system based on statistical rock mass mechanics. According to the calculation method, field test data of rock uniaxialcompressive strength, deformation parameters and a rock mass structural surface network and the structural surface friction angle serves as the basis, engineering design parameters such as the anisotropy elasticity modulus, the poisson ratio, the permeability ellipsoid and the permeability coefficient and anisotropy ratios and weakening coefficients of various parameters are calculated, and all-space-direction rock mass quality grading is conducted. By means of the calculation method, more reliable calculation parameters can be provided for engineering design through comparison and revision ofa proper quantity of in-situ test data, the workload and investment for large in-situ tests can be greatly reduced, and the period of early-stage investigation of a project can be remarkably shortened, so that huge engineering and economic benefits are generated.
Owner:浙江岩创科技有限公司
Method for determining anisotropic elastic modulus of schist
ActiveCN103234826AExcavation disturbance is smallAvoid damageWithdrawing sample devicesMaterial strength using tensile/compressive forcesUniaxial compressionRock core
Owner:ZHEJIANG ZHONGKE ITASCA ROCK ENG RESDEV +1
Fractured reservoir parameter inversion method based on orientation elastic impedance difference
InactiveCN104597491AInversion results are stableThe inversion result is accurateSeismic signal processingClassical mechanicsReservoir fluid
The invention provides a fractured reservoir parameter inversion method based on orientation elastic impedance difference. The method removes effects of isotropic parameters on orientation anisotropic elasticity impedance, further extracts orientation difference caused by the isotropic parameters, and solves the problem in the prior art of inaccurate inversion caused by narrow difference negligence caused by the fact that orientation elasticity impedance change caused by the anisotropic parameters is small when the isotropic parameters and the anisotropic parameters are inverted simultaneously. Orientation difference is amplified simultaneously, the inversion stability is improved while inversion accuracy of the anisotropic parameters is not affected, and the method provides reliable guarantee for recognition of fractured reservoir fluid recognition.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Methods and systems for estimating stress using seismic data
InactiveUS8619500B2Electric/magnetic detection for well-loggingSeismic signal processingHorizontal stressPrincipal stress
A method for estimating principal stresses of a subterranean formation from seismic data. In one embodiment, rock strength parameters from seismic data of the formation is first determined to calculate the anisotropic elastic properties of the formation. The three principal stresses of the formation: vertical stress, minimum horizontal stress, and maximum horizontal stress, is determined using at least the calculated anisotropic elastic properties and the rock strength parameters of the formation. From the estimated principal stresses, the differential ratio of the maximum and minimum horizontal stresses can be determined to indicate optimal zones for hydraulic fracturing. In another embodiment, a tectonic strain term is introduced to calibrate the estimated principal estimated stress to a known reference point. In yet another embodiment, hoop stress is incorporated to estimate the fracture initiation pressures.
Owner:GRAY FREDERICK D
Single piece abdominal support garment
A single piece garment for those having a distended abdomen, said garment extending upwards from the groin to beneath the breasts. The garment comprises an inner layer and an outer layer. The inner layer has several elastomeric fabrics having differing modulus of elasticity. A section beneath the abdomen is formed from an anisotropic elastomeric fabric with a low modulus of elasticity that supports a distended abdomen. Side panels extending upwards from the abdomen across the hips to the lumbar region are made from an isotropic elastomeric fabric having a moderate modulus of elasticity. These connect to a rear panel across the lumbar of an anisotropic elastomeric fabric having a moderate modulus of elasticity. The directionality of the anisotropic elastomeric fabrics is from the abdomen across the hips to the lumbar region. The entire garment has an outer layer of an isotropic elastomeric fabric with a relatively low modulus of elasticity except for an elastomeric fabric across the lumbar region formed from a high modulus anisotropic elastomeric fabric.
Owner:FONG THERESA
Method, system and device for detecting anisotropic elastic constant of material, and storage medium
ActiveCN110702504AReduce the cost of mechanical testingShorten the durationComplex mathematical operationsStrength propertiesVirtual fieldFull field
The invention discloses a method, a system and a device for detecting an anisotropic elastic constant of a material, and a storage medium. The method comprises the steps of obtaining deformation displacement and strain information of the material through the full-field strain measurement technology, establishing multiple groups of different virtual fields based on a characteristic function virtualfield method, and analyzing the deformation displacement and the strain information based on the virtual fields to finally detect the anisotropic elastic constant of the material. The system comprises a measurement module, an obtaining module, a detection module, a processing module and a display module. The device comprises a memory for storing programs, and a processor for loading the programsto perform the method. By using the method disclosed by the invention, multiple mechanical parameters of the material can be obtained at one time, thereby greatly reducing the input of the cost of a mechanical test of the material, and improving the analysis working efficiency of the material by workers. The method, the system and the device disclosed by the invention can be widely applied to thetechnical field of material detection.
Owner:GUANGZHOU UNIVERSITY
Transverse isotropic shale formation brittleness index prediction method
ActiveCN113189647AOvercome the defect of ignoring the influence of anisotropyAnisotropic features accurately reflectSeismology for water-loggingWell drillingShale gas
The invention discloses a transverse isotropic shale formation brittleness index prediction method. The method comprises the following steps of determining a shale anisotropic rigidity coefficient according to the full wave train acoustic logging information; calculating a stiffness matrix, a shale anisotropic elastic modulus and a Poisson ratio of the transverse isotropic shale; calculating a flexibility matrix of the transverse isotropic shale under the stratum coordinates; calculating a shale stiffness matrix and a flexibility matrix under any azimuth angle and hole drift angle conditions; calculating shale elastic modulus and Poisson's ratio under any well deviation and azimuth borehole observation coordinates; and calculating the transverse isotropic shale formation brittleness index. According to the method, the anisotropic characteristics of the shale are considered, the transverse isotropic shale formation brittleness index is evaluated from the angle of actual drilling holes, a defect that the traditional shale brittleness index neglects the anisotropic influence is overcome, and the anisotropic characteristics of the shale brittleness index and the characteristics of the shale brittleness index influenced by hole tracks can be reflected more accurately; scientific basis and decision support can be provided for drilling and fracturing of the shale gas horizontal well.
Owner:SOUTHWEST PETROLEUM UNIV
Diffusion-kurtosis-imaging-based radial kurtosis anisotropic quantitative method
ActiveCN107219483ARich and precise structural geometric featuresRich and precise neural white matter microstructural abnormalitiesMagnetic measurementsDiffusionRadial plane
The invention relates to a diffusion-kurtosis-imaging-based radial kurtosis anisotropic quantitative method. The method comprises: according to original data, a tensor is estimated by a diffusion kurtosis imaging model; according to a diffusion tensor matrix D, a radial plane is defined; distribution of a diffusion coefficient and a kurtosis coefficient in the radial plane are obtained; and anisotropy of a radial kurtosis Kp is calculated. According to the method provided by the invention, after preprocessing on a collected MRI signal, calculation is carried out based on the method to obtain a kurtosis distribution anisotropy index in the radial plane based on a diffusion tensor and a kurtosis tensor, wherein the index is capable of reflecting the structural geometrical characteristic of the object in the cross section and reflecting the structural characteristic that is more accurate than diffusion information. With the index, the neural white-matter microstructural abnormity, the non-uniform characteristic of the anisotropic elasticity at the cross section, tissue development, and pathogeny structure changing can be reflected precisely based on several kinds of analyses like a statistic analysis and a classification algorithm.
Owner:TIANJIN UNIV
Elastic imaging method and device for measuring anisotropic elastic properties of nerves
ActiveCN111067567AUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsElastographyPeripheral neuron
Owner:TSINGHUA UNIV
Method and system for estimating breakdown pressure using rock weakness index
ActiveUS10935481B2Earth material testingPermeability/surface area analysisClassical mechanicsMechanics
A method for estimating breakdown pressure values along a wellbore starts from analyzing cuttings from locations along the wellbore to determine rock properties, including rock texture information associated with the locations. The anisotropic elastic and mechanical properties at the locations are calculated based on the rock properties and using at least one rock physics model. Rock weakness index values corresponding to the locations are then calculated based on the anisotropic elastic and mechanical properties and the rock texture information. The breakdown pressure values at the locations are estimated from the rock weakness index values.
Owner:CGG SERVICES SAS
Orthotropic shale brittleness index prediction method
ActiveCN113189648AOvercome the defect of ignoring the influence of anisotropyAnisotropic features accurately reflectSeismology for water-loggingWell drillingLongitudinal wave
The invention discloses an orthotropic shale brittleness index prediction method. The method comprises the following steps of measuring longitudinal wave velocities in six directions and transverse wave velocities in three directions; calculating the anisotropic rigidity coefficient of the shale; determining a stiffness matrix CORT of orthotropic shale under the stratum coordinates; determining the anisotropic elastic modulus and Poisson's ratio of the shale; determining a flexibility matrix SORT of orthotropic shale under the stratum coordinates; calculating the shale elasticity modulus and Poisson's ratio under the borehole observation coordinates; and calculating the brittleness index of the orthotropic shale. According to the method, the anisotropy characteristics of the shale are considered, the brittleness index of the orthotropic shale formation is evaluated from the angle of the actual drilling hole, a defect that the traditional shale brittleness index neglects the anisotropy influence is overcome, and the anisotropy characteristics of the shale brittleness index and the characteristics of the shale brittleness index influenced by the hole track can be reflected more accurately; scientific basis and decision support can be provided for drilling and fracturing of the shale gas horizontal well.
Owner:SOUTHWEST PETROLEUM UNIV
Orthotropic alternatively laminated composite damping material and damping modulation method thereof
InactiveCN101863149AThin structureStructural damping value increasedLamination ancillary operationsLaminationAviationResin matrix
The invention relates to an orthotropic alternatively laminated composite damping material, which is characterized by being an orthotropic alternatively laminated composite damping material with dispersed multiple damping layers formed by alternatively laminating damping material thin layers and high-strength anisotropic elastic material thin layers. The composite damping material in the invention has the advantages of light and thin structure, greatly improving structure damping value, strong designability, high structure strength, easy manufacturing and less equipment investment, and is an ideal path to searching and developing a novel environment functional material with composition of material and structure. The composite damping structure material with the structure damping valve more than 0.5 can be obtained by a DMA frequency scanning test at room temperature, the damping value thereof is 20 times of that of the existing fiber reinforced resin matrix composite material. The invention is suitable for damping and sound proof aspects in the fields of aviation, ships, engineering machinery, buildings and the like, and can determine parameters of damping products according to actual demands so as to determine to process specific products.
Owner:NANCHANG HANGKONG UNIVERSITY
Porous grinding tool and grinding tool having same
ActiveCN108698205BPrecision Surface AccuracyFlexible-parts wheelsGrinding/polishing hand toolsPolishingEngineering
Owner:XEBEC TECH CO LTD
Crack Detection Method Based on Azimuthal Anisotropic Elastic Impedance
InactiveCN104005760BImprove noise immunityHigh degree of fitBorehole/well accessoriesWell loggingNumerical models
The invention relates to an azimuthal anisotropic elastic impedance based crack detection method. With a Connolly elastic impedance equation and a Ruger equation serving as the basis, anisotropic elastic impedance and crack parameters and the dominance relation formula between crack density and crack azimuth are deduced. A set of elastic impedance based crack inversion process is established, and anisotropic parameter information is added into inversion well logging constraint. Numerical model testing is performed in the method, the inversion result is roughly identical to the theoretical value, and the inversion density shows high noise immunity. The method has the advantages that anisotropic elastic impedance can be used, the crack density and the crack azimuth are calculated simultaneously, good application effects are provided in actual data, and high practicality is provided.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Method and device for calculating Rayleigh surface wave dispersion response by forward modeling of wave equation
ActiveCN102749643BExplain correctnessExplain credibilitySeismic signal processingTime domainWave equation
Owner:PETROCHINA CO LTD
A kind of preparation method and use of anisotropic elastic auxetic fabric
ActiveCN108688138BVersatilitySimple processAdditive manufacturing apparatusDomestic articlesPolymer scienceModeling software
The invention relates to a preparation method and application of anisotropic elastic auxetic fabric. The preparation method adopts three-dimensional modeling software to model and introduce the modelinto a 3D printer which can print out bi-component materials, and the 3D printer prints an auxetic fabric which is softer and more elastic in the lateral direction than the longitudinal material. Theprepared anisotropic elastic auxetic fabric can be used as clothing, backpacks, masks, artificial blood vessels, filter materials and the like. The preparation method has the characteristics of convenient processing, integrated molding and good material cohesiveness, and extensive available raw materials.
Owner:DONGHUA UNIV
Material anisotropic elastic constant detection method, system, device and storage medium
ActiveCN110702504BReduce the cost of mechanical testingShorten the durationComplex mathematical operationsStrength propertiesVirtual fieldFull field strain
The invention discloses a method, system, device and storage medium for detecting the anisotropic elastic constant of a material. The method includes: obtaining the deformation displacement and strain information of the material through the full-field strain measurement technology, and establishing multiple groups based on the characteristic function virtual field method. different virtual fields and analyze the deformation displacement and strain information based on the virtual fields, so as to finally detect the anisotropic elastic constant of the material. The system includes a measurement module, an acquisition module, a detection module, a processing module and a display module. The apparatus includes a memory for storing a program and a processor for loading the program to perform the method. By using the method of the invention, a plurality of mechanical parameters of the material can be obtained at one time, greatly reducing the investment in the cost of the material mechanical test, and improving the efficiency of staff in material analysis work. The invention can be widely used in the technical field of material detection.
Owner:GUANGZHOU UNIVERSITY
A Prediction Method of Orthotropic Shale Brittleness Index
ActiveCN113189648BOvercome the defect of ignoring the influence of anisotropyAnisotropic features accurately reflectSeismology for water-loggingHorizontal wellsWell drilling
The invention discloses a method for predicting the brittleness index of orthotropic shale, which includes measuring the longitudinal wave velocity in six directions and the shear wave velocity in three directions; calculating the anisotropic stiffness coefficient of shale; Stiffness matrix C of heterogeneous shale ORT ; Determine the anisotropic elastic modulus and Poisson's ratio of the shale; determine the flexibility matrix S of the orthotropic shale in the formation coordinates ORT ; Calculation of shale elastic modulus and Poisson's ratio under the wellbore observation coordinates; calculation of brittleness index of orthotropic shale. The invention considers the anisotropy characteristics of shale, evaluates the brittleness index of orthotropic shale formation from the perspective of actual drilling, overcomes the defect that the traditional shale brittleness index ignores the influence of anisotropy, and can more accurately reflect the shale brittleness Exponential anisotropy and its influence on well trajectory can provide scientific basis and decision-making support for shale gas horizontal well drilling and fracturing.
Owner:SOUTHWEST PETROLEUM UNIV
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