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.

The invention discloses a mechanical matched construction method for full fracture surfaces and micro steps of IV and V stage weak surrounding rocks of a tunnel and relates to the field of tunnel construction. The method mainly solves the problem that the construction efficiency is low as full fracture surface excavation and step process excavation are adopted in current tunnel construction. The method comprises the following steps of carrying out advanced geological forecast; carrying out construction on an advanced support by using a middle pipe shed, positioning and drilling by using a three-arm drill jambo, drilling the V stage surrounding rock or a section with relatively complex geology by adopting a pipe-following operation, and grouting the pipe shed by using a grouting machine; adopting a full fracture surface method to excavate a hard rock segment of IV stage surrounding rock; adopting a micro step process to excavate soft rock of the IV stage surrounding rock and the sectionof the V stage surrounding rock; grabbing an arch frame by using a clamping structure of an arch frame assembling machine and lifting and positioning the arch frame to a designed position, carrying out system anchor rod and locking tremie construction by using an anchor rod trolley, injecting concrete to construct by using a wet spraying manipulator, and adopting a mobile inverted arch trestle for construction of an trestle and trestle filling; and pouring a secondary lining by using an integral hydraulic lining trolley. The method has the advantage that the construction speed can be increased.

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 invention relates to the technical field of oil reservoir geology, in particular to a method for evaluating a fracturing fracture by using an interference well testing theory. The method comprisesthe steps that the communication condition between a pressure flooding well and surrounding adjacent wells is investigated, and the well cementation quality, a pressure flooding target layer position, dynamic production information and a sedimentary facies belt map of the pressure flooding well are collected; a pressure-flooding pressure real-time monitoring well is determined; the middle depth of an oil reservoir of the pressure real-time monitoring well, the distance between the monitoring well and the pressure flooding well, the dynamic production condition and the conditions of a production string, a wellhead and a well site are determined, and the testing mode is determined to be pressure gauge real-time monitoring; a real-time monitoring scheme is formulated, and test construction steps and requirements are determined; in the pressure flooding process, adjacent well pressure real-time monitoring original data are checked; a well pressure curve is monitored, and pressure floodinginterference time lag analysis is carried out; and pressure flooding fracture evaluation is performed according to a pressure flooding interference time lag interpretation result. According to the provided method for evaluating the fracture, by using the interference well testing principle, the inter-well connectivity is judged and the fracture length is explained by monitoring the adjacent wellpressure.

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 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 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 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 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.