42 results about "Fracture (geology)" patented technology

Assessing the impact of existing fractures and faults for reservoir management, in one aspect, may comprise employing a numerical mesh to generate a geomechanical model, the numerical mesh representing a geological reservoir and its surrounding regions, the numerical mesh comprising delimitation associated with regions and layering of geology without constraining the numerical mesh to explicitly represent a fault or fracture, initializing the geomechanical model to define initial stress-strain compatible with measured stress in well locations associated with the geological reservoir, generating a fluid-flow model employing the numerical mesh, solving for a coupled solution of the fluid-flow model and the geomechanical model, and employing the solved fluid-flow model and the geomechanical model to assess the impact.

A plugging method and control system for drilling reservoir fractures. The method includes: (1). Collecting geology, drilling, drilling fluid and leakage parameters to calculate the width of reservoir fractures; (2). The width is selected to correspond to the particle size of the plugging material; (3). The pore size formed by the plugging material in step (2) is obtained through calculation, and the next-level plugging material with a particle size corresponding to the pore size is selected, and the next-level plugging material is sealed. Plug the pore size formed by the first level of plugging material; according to the above, calculate the pore size of each level of plugging material step by step, and select the corresponding particle size plugging material to form multi-level small particle size plugging The material is a plugging drilling fluid formula that plugs the pores of large particle size plugging materials to plug reservoir fractures. The control system includes a reservoir fracture width calculation module of an interactive user interface, a plugging drilling fluid formula generation module, a data record storage module and a display formula design module. It is convenient, practical and timely.

The invention discloses a deep shale gas horizontal well fracturing differentiation design method based on logging data. The method comprises the following steps: S1, calculating rock mechanical parameters and reservoir physical property parameters of horizontal well sections; S2, correcting the rock mechanical parameters calculated only by longitudinal and transverse waves in the S1, and calculating and obtaining corrected rock mechanical parameters; S3, calculating formation weak plane development parameters; S4, calculating a comprehensive brittleness index, a fracture network construction capability index and a horizontal section resource abundance evaluation index of the horizontal sections of the target deep shale gas well; S5, calculating a 'geology-engineering' comprehensive evaluation index of the horizontal sections of the target deep shale gas well, and drawing a curve; and S6, conducting comprehensive compressibility grading on the horizontal sections of the target deep shale gas well, and optimizing the optimal fracturing process method and the like for different horizontal well sections according to the grades obtained after comprehensive compressibility grading. The fracturing cost of a deep shale gas horizontal well fracture net can be remarkably reduced, the construction efficiency is improved, and the yield increasing effect is improved.

The invention discloses a three-dimensional complex geologic model label manufacturing method suitable for a machine learning algorithm, is applied to the seismic data processing field, and aims at solving the problem that a three-dimensional geological model constructed in the prior art does not completely conform to stratum deposition and geomechanics rules. The method is based on the theories of stratigraphic sedimentology, tectonic geology, geotectonic mechanics and the like; a stratum deposition rule and a stratum stress condition generated by a fault are considered; factors such as connection among karst caves, holes, fractures and faults are avoided; a three-dimensional complex geologic model label manufacturing method suitable for a machine learning algorithm is provided, construction of a large number of three-dimensional geologic models conforming to actual geological conditions is achieved, a seismic wave field response simulation technology is combined, and conditions are provided for extracting complex geologic structure oil and gas reservoir related parameters from seismic data through the machine learning algorithm.

The embodiment of the invention provides a seismic wave velocity parameter determination method, device and equipment based on DEM model. The method comprises the following steps: acquiring actually measured bulk moduli and actually measured shear moduli of a rock sample under at least two different pressures; calculating a high-pressure modulus by using the actually measured bulk modulus and the actually measured shear modulus; based on the relationship between the modulus and the fracture density under a DEM model, determining the accumulated fracture density corresponding to the rock sample through the high-pressure modulus; calculating micro-fracture porosity distribution spectrums under the at least two different pressures according to the accumulated fracture density; determining seismic wave speed parameters corresponding to the rock sample by combining pore structure parameters of the rock sample and the micro-fracture porosity distribution spectrum, wherein the seismic wave velocity parameters comprise velocity dispersion and attenuation. According to the method, accurate calculation of seismic wave speed dispersion and attenuation in microcosmic pore structure dominated geology is realized, and production and development in practical application are facilitated.

The invention proposes a method for determining unsteady flow bottom hole pressure of a fractured well in a dense oil reservoir. The method comprises the following steps of hydraulically fracturing areservoir to form a vertical well with multiple fractures; collecting fracture parameters of the multiple fractures and basic information of the oil reservoir, wherein the fracture parameters includefracture orientation and permeability; establishing a multi-fracture physical model for the fracturing vertical well; in the multi-fracture physical model, determining a dimensionless bottom hole pressure calculation equation based on the permeability and fracture orientation for a single fracture; determining a change value of the bottom hole pressure of a single fracture along with the time in combination with the fracture parameters and the basic information of the oil reservoir according to the dimensionless bottom hole pressure calculation equation; and repeating the above steps to calculate change values of the bottom hole pressure of each fracture in the multiple fractures along with the time. The method provided by the invention has the advantages of comprehensively considering thedense oil reservoir geology and the static parameters of the oil reservoir itself, considering the influence of asymmetric distribution of the fractures on the wellbore at the same time, and perfecting the description of a bottom hole fluid flow model of the fractured well.

The invention discloses a sea-land transition phase shale reservoir three-dimensional utilization development evaluation method which comprises the following steps: 1, based on logging data of a target sea-land transition phase shale gas well, calculating rock mechanics parameters, formation weak plane development parameters, reservoir physical property parameters and lithologic interface difference parameters of a single layer, namely an ith layer, of a horizontal well section; 2, calculating single-layer and multi-layer stacked three-dimensional matrix evaluation factors, fracture network evaluation factors and abundance evaluation factors of the horizontal section of the target well; 3, obtaining a three-dimensional'geology-engineering 'comprehensive evaluation index based on the multi-layer stacked three-dimensional matrix evaluation factor, the fracture network evaluation factor and the abundance evaluation factor; and 4, carrying out three-dimensional development evaluation grading on multiple layers of the horizontal sections of the target well, and carrying out three-dimensional production development effect evaluation on different multiple layers of stacked horizontal well sections according to the grade. According to the method, the sea-land transition phase fracturing cost can be remarkably reduced, the construction efficiency is improved, the yield increasing effect is improved, and large-scale efficient development of sea-land transition phase resources is facilitated.

The invention provides a natural fracture modeling and fracturing simulation method and device, a computer and a storage medium. The method comprises the steps that a three-dimensional geological grid model of a preset work area is established; calculating to obtain post-stack attributes and pre-stack inversion class attributes reflecting faults and natural fractures, and importing the post-stack attributes and the pre-stack inversion class attributes into the three-dimensional geological grid model; on the basis of the three-dimensional geological grid model and on the basis of the ground coarsened curve information, a neural network algorithm is adopted to predict distribution of reservoir attributes in space, and a natural fracture model of the preset work area is obtained; on the basis of the natural fracture model, the average fracture surface density attribute of a target layer is extracted, and equivalent natural fracture information is generated; and performing fracturing simulation according to the natural fracture parameters. A fracture development distribution model, namely a natural fracture model, is established through a neural network algorithm by utilizing pre-stack attributes and post-stack attributes of seismic data in combination with geology, lithology and logging information, so that multiplicity of solutions of fractured reservoir prediction is reduced.

The embodiment of the invention provides a seismic wave velocity parameter determination method, device and equipment based on an SCA model. The method comprises the following steps: acquiring actually measured bulk moduli and actually measured shear moduli of a rock sample under at least two different pressures; calculating a high-pressure modulus by using the actually measured bulk modulus and the actually measured shear modulus; based on the relationship between the modulus and the fracture density under the SCA model, determining the accumulated fracture density corresponding to the rock sample through the high-pressure modulus; calculating micro-fracture porosity distribution spectrums under the at least two different pressures according to the accumulated fracture density; determining seismic wave speed parameters corresponding to the rock sample by combining pore structure parameters of the rock sample and the micro-fracture porosity distribution spectrum, wherein the seismic wave velocity parameters comprise velocity dispersion and attenuation. According to the method, accurate calculation of seismic wave speed dispersion and attenuation in microcosmic pore structure dominated geology is realized, and production and development in practical application are facilitated.

The invention discloses a backwash strike-slip fracture wrinkle grading and partitioning analysis and three-dimensional characterization method. The method comprises the following steps: firstly, carrying out fractured stratum partitioning division and comparison by adopting a four-step method and depending on sedimentary cycle and a key marker bed; a differential geology-logging-earthquake 2D / 3D window fusion technology is adopted to analyze a master control second-level fault, third-level faults, fourth-level faults and fifth-level faults with obvious earthquake and logging characteristics, and third-level faults and fourth-level faults with only obvious earthquake characteristics; and carrying out three-dimensional modeling and panoramic representation on the multi-scale and multi-type fracture wrinkles: carrying out stepped grid modeling on the multi-scale and multi-type fracture wrinkles by adopting a four-step method in an angular point grid system according to a hierarchical classification analysis result, and completing multi-view panoramic visualization representation on the multi-scale and multi-type fracture wrinkles. According to the method, accurate identification, reasonable combination, reliable inspection, three-dimensional modeling and panoramic characterization of all levels and various types of fault wrinkles in the backwash strike-slip fracture wrinkle system are realized.

The invention provides a method for identifying a maximum paleo-stress direction in a strike-slip fracture development period. The method comprises the following steps: finely explaining strike-slip fractures, dividing strike-slip fracture superposed upheaval sections, superposed pull subsections and translation sections, selecting typical splicing sections, identifying a local principal stress direction, and establishing a stress field numerical simulation geology and mechanics model of the typical splicing sections; loading regional stress fields in different directions to the model in the direction range of the regional stress field of strike-slip fracture; and determining the direction of the maximum paleo-stress in the strike-slip fracture development period. The invention has the advantages that the method comprises establishing a relationship between a secondary fracture trend in a strike-slip fracture splicing section and a corresponding regional stress field direction; and identifying the maximum paleo-stress direction in the strike-slip fracture development period, so the method has important guiding significance in knowing the regional structure background, analyzing thecause and evolution of strike-slip fracture, discussing the development law of a derived fracture-fracture system at different parts of strike-slip fracture and controlling storage and reservoir.

The invention discloses a tectonic physical simulation experiment device and relates to the technical field of tectonic geology and petroleum geology. The tectonic physical simulation experiment device comprises a power shaft, a scanner, a sanding device, a camera, a video camera and a sand box, wherein the power shaft extends into the sand box, the scanner, the sanding device and the camera are all located above the sand box, and the video camera is located in front of the sand box. the invention further discloses a tension-torsion fracture structure activity quantitative evaluation method. The evaluation method comprises the following steps of research area structure activity quantitative analysis, structure stress field numerical simulation, structure physical simulation experiment and mutual verification and correction of the structure stress field numerical simulation and the structure physical simulation experiment. According to the method, methods such as field actual measurement, structural analysis, stress field numerical simulation and structural physical simulation are combined, the torsional-tensile fracture structural activity quantitative evaluation is achieved, and the method has general applicability and operability.

The invention discloses a compact oil and gas storage and seepage body seismic fine description method. The method comprises steps of carrying out reservoir inversion and inversion effect analysis according to the characteristics of compact oil and gas geology and geophysics, based on the post-stack time migration seismic data, and through the optimization of an inversion method test; according to a reservoir inversion result, calculating to obtain an energy storage coefficient; according to the method, difficulty that the fractured reservoir is difficult to describe comprehensively due to different dimensions of different seismic attributes being overcome, and for different-scale faults and fracture prediction methods and parameters, information representing fractures, fractures and fracture zone ranges being added after the dimensions are unified to obtain a fracture comprehensive evaluation body; and carrying out attribute fusion on the representation reservoir and the breaking joint information body to obtain a comprehensive evaluation body. The method is advantaged in that the development law of the compact oil and gas storage and seepage body can be visually reflected, and well position deployment can be evaluated with high precision and high efficiency; a good application effect is achieved in practical application, and the coincidence rate with a real drilling well is high.

The invention discloses a method for explaining natural karst fracture stages by using imaging logging, which comprises the following steps of: 1, researching rock core observation and regional tectonic movement history and mechanism, determining control factors and development distribution rules of natural fractures, and extracting characteristic marks of the fracture stages; 2, obtaining rock core calibration imaging logging data; 3, distinguishing natural fractures and induced fractures by using imaging logging information; 4, distinguishing a tectonic fracture and a diagenetic fracture byusing imaging logging information; 5, extracting parameters such as the width, the density, the length and the occurrence of the fracture; 6, identifying a group system of the natural fractures according to the extracted fracture occurrence parameters; 7, explaining the mutual sequence of the fractures according to the mutual relation of the group fractures and the characteristic marks identifiedby the fracture stages; and 8, determining the formation periods of the fractures one by one according to the formation sequence of the group fractures. The method for explaining the natural karst fracture stages by using imaging logging disclosed by the invention provides a new way for deep development of oil and gas geology comprehensive research.

The invention discloses a rock fracture observation device and method, and the device comprises an objective table which is used for fixing a rock sample; a magnetic field generating device which is used for applying magnetic force to the rock sample; a light source which is used for irradiating the rock sample to form a fluorescence image on the surface of the rock sample; and an imaging device which is used for collecting fluorescence images. The method comprises steps coating an auxiliary observation material on the surface of one side of the rock sample; applying magnetic force to the rocksample through the magnetic field generating device; observing the characteristics of fluorescence property, magnetism and flowability of the material by daubing in an auxiliary manner; under the action of a magnetic field, the auxiliary observation material permeates to the other side of the rock sample, the auxiliary observation material on the surface of the rock sample emits fluorescence under irradiation of the light source, the imaging device is used for collecting a fluorescence image with crack distribution characteristics on the surface of the rock sample, direct observation of the size and form of rock cracks is achieved, and a reference basis is provided for oil and gas geology research work.

The invention discloses a method for calculating parameters of a primary fracture of overlying strata of a coal seam. The method comprises the following steps: acquiring an I3D fracture indication strength data body; acquiring water testing pressure data; acquiring slurry consumption data; calculating the equivalent width of the crack; calculating the equivalent length of the crack. The method is suitable for the technical field of coal mining, the method is simple, actual operation is convenient, in the coal mining exploration and mining process, mud leakage amount and water testing pressure data are convenient to record, the coverage is wide, real-time updating is achieved, and application and popularization of the method in the field of coal fields are facilitated. Meanwhile, the field of geological engineering integrated research is broadened, a correlation is established between equivalent length and equivalent width parameters of the crack and the slurry leakage amount and the water testing pressure, cognition of geology and engineers on underground conditions is unified, a unified measurement unit is used, and calculation data can be directly applied to engineering design and construction; the geophysical fracture prediction result is quickly converted to field application, and the result conversion rate of geological scientific research is greatly improved.

The invention belongs to the technical field of hydrogeology, and particularly discloses an experimental method suitable for deep underground water formation evolution research in a bedrock fracture area, which comprises the following steps of 1, coring and drilling a research area in the bedrock fracture area, and collecting deep undisturbed underground water, 2, carrying out indoor water-rock interaction experiments at different temperatures on the deep undisturbed underground water collected in the step 1 and the rock core sample at the corresponding depth, and 3, collecting a water sampleafter the water-rock interaction reaction in the step 2, sending the sample for testing, and analyzing the formation and evolution process of the deep underground water in the bedrock fracture area according to a test result, so as to complete the research on the formation and evolution process of the deep underground water in the bedrock fracture area. The method provided by the invention can provide a quantitative basis for research on formation and evolution of deep underground water in the bedrock fracture area by carrying out indoor deep water-rock action experiments at different temperatures.

The invention discloses an internal diversion fracturing temporary plugging agent dosage design method based on shale geology-engineering parameters, which comprises the following steps of: firstly, accurately measuring critical temporary plugging pressure under the conditions of different crack widths, different temporary plugging agent types and different temporary plugging agent dosages; according to shale stratum rock mechanical parameters and fracturing engineering parameters, calculating the hydraulic fracture opening change condition, and calculating the critical turning pressure in the fracture; and determining the dosage of the diversion fracturing temporary plugging agent in the shale gas horizontal well crack by combining a theoretical calculation result and experimental test data. The invention provides a method for measuring the critical temporary plugging pressure of different types of temporary plugging agents in fractures with different widths, and through the calculation of the hydraulic fracture width and the critical diversion pressure in the fracture, the reasonable dosage of the temporary plugging agent injected into the shale gas horizontal well fracture during diversion fracturing is determined, fracture diversion is achieved, the complexity of a fracture network is improved, and the situation that the wellhead pressure is too high is avoided; and the construction safety is guaranteed, and reliable guidance is provided for on-site fracturing construction.

The invention relates to a self-propelled anchor cable based on a fracture water early warning device, and belongs to the field of civil engineering, which is a supporting device and is mainly applied to complex geology of rock stratum fracture development. The self-propelled anchor cable comprises a self-propelled anchor cable and a fracture water early warning device, wherein the self-propelled anchor cable and the fracture water early warning device are connected with each other, the self-propelled anchor cable is connected with the fracture water early warning device through a drainage wire, a hollow alloy drill bit is arranged at the head of the self-propelled anchor cable, water inlets are formed in the outer side and the top of the hollow alloy drill bit, self-propelled threads are arranged on the outer side of a rod body, grouting holes are evenly distributed in the rod body, the drainage wire is arranged on the inner side of the rod body, one end of the drainage wire is arranged in the hollow alloy drill bit, the other end of the drainage wire penetrates through a stop-grouting plug and then is connected with the fracture water early warning device, the self-propelled anchor cable adopts a connecting sleeve to lengthen the rod body, the tail of the rod body is composed of a base plate, a nut, the stop-grouting plug and a slurry blocking plug, the early warning device is composed of early warning test paper and a waterproof protective sleeve, and the early warning test paper is arranged in the waterproof protective sleeve and has the effect of early warning fracture water to flow into an anchor cable anchoring stratum along with fracture development. The self-propelled anchor cable and the early warning device have the advantages of the simple structure, good supporting effect, convenience in construction, high construction speed, low economic cost and simple construction step, the working time is shortened, and the manufacturing cost is reduced.

The invention discloses a method for detecting deep fracture geology through induced polarization composite frequency, and the method comprises the steps: installing power supply electrodes on a detection line in a tunnel in advance, and determining geological and physical data and a calibration value between the power supply electrodes through a double-frequency induced polarization detection device; transmitting the geological physical data and the calibration value to a big data center, generating a profile map, and determining a geological state; transmitting the profile map to simulationequipment, and constructing a simulation tunnel geological model according to the state geological condition; and optimizing the tunnel geological model through the simulation equipment, and determining fracture information of tunnel geology. The method for detecting the deep fracture geology through the induced polarization composite frequency has the advantages that simulation modeling is conducted on the detected geology through the whole method, construction is convenient, the requirement for the terrain is not high, the induced polarization device is light, rapid and flexible, stable andhigh-precision observation data are provided, and the fracture situation of the geology is determined through simulation modeling.

The invention discloses a method for seismic fine characterization of tight oil and gas storage and seepage bodies. According to the characteristics of tight oil and gas geology and geophysics, based on post-stack time migration seismic data, through the optimization of the inversion method test, the reservoir inversion and inversion are performed. Based on the results of reservoir inversion, the energy storage coefficient is calculated; overcoming the difficulty of comprehensively describing fractured reservoirs caused by the different dimensions of different seismic attributes, for faults of different scales and fault prediction methods and parameters, in After unifying the dimensions, add the information representing the range of fractures, fractures, and fault zones to obtain a comprehensive evaluation body for faults; fuse the attributes of reservoirs and fractures to obtain a comprehensive evaluation body. The invention can intuitively reflect the development law of tight oil and gas storage and seepage bodies, and conduct evaluation well position deployment with high precision and high efficiency. Good application effect has been obtained in practical application, and the coincidence rate with actual drilling is high.

The invention relates to a permeability determination method and device, a characterization method and device, electronic equipment and a storage medium, and relates to the technical field of dynamic fracture geology, and the permeability determination method is applied to dynamic fracture geology and comprises the steps of obtaining the fracture opening degree of any position, away from the fracture center, on a dynamic fracture geology fracture; and determining the real-time dynamic fracture permeability of the fracture between the water well and the oil well in the water injection development process based on the fracture opening. According to the embodiment of the invention, the real-time dynamic measurement of the fracture permeability of the fracture between the water well and the oil well in the water injection development process can be realized.