12 results about "Thrust fault" patented technology

The present application relates to a kind of quantitative evaluation method of tendency composite fault mudstone daub effect, which can accurately calculate and determine the sealing capacity of different fault dip tendency, stratigraphic dip tendency lower fault, realize the prediction and evaluation of oil and gas migration direction.This method is used in the strike-slip fault zone of Zhunzhong area and western depression area in Junggar Basin, the scale thrust fault of the middle section of the southern margin of Junggar Basin and the normal fault oil and gas fine exploration research in Xianhe area of Jiyang depression in Bohai Bay Basin, successfully predicted multiple fault-controlled oil and gas enrichment favorable zones, increased the drilling success rate by 30%, fully proved from the practice level that the technology is suitable for the fault sealing evaluation in China east and west, plays an important role in the prediction of fault-controlled oil and gas reservoir and fault migration path.

The present application belongs to the technical field of petroleum exploration, and discloses a method for identifying a thrust anticline trap of a buried hill in a rift basin, comprising: obtaining a three-dimensional seismic data volume of the rift basin containing stratum horizon data; selecting a seismic profile in a direction substantially perpendicular to the extension direction of the rift basin to identify a thrust fault; selecting a seismic profile and a seismic isochronous slice of the upthrown side of the thrust fault to identify a thrust anticline structure of the buried hill; and judging whether the thrust anticline structure of the buried hill develops a weathering crust reservoir and an overlying layer simultaneously, and if so, identifying the thrust anticline trap of the buried hill in the rift basin as effective. In the present application, the selection of the seismic profile in the direction substantially perpendicular to the extension direction of the rift basin can improve the success rate of identifying the concealed thrust fault in the buried hill. The method of combining the seismic profile and the seismic isochronous slice to identify the thrust anticline structure can improve the identification accuracy of the thrust anticline of the buried hill.

This invention relates to the field of slope stability technology, and more particularly to a slope stability optimization and reinforcement method based on fault sliding mode. The method includes the following steps: acquiring basic information of the target slope, determining the slope's state data by combining geological conditions and geometric information, detecting the fault zone's strike trend based on geological data, performing bedding-parallel sliding detection on the slope state, analyzing the cumulative increase of sliding stress, performing reverse fault jacking detection, estimating the slope's progressive failure trend by combining sliding stress and jacking conditions, determining the slope stability decay based on the failure growth trend, tracing the source data of missing stability data, and performing reinforcement optimization calculations to derive a reinforcement scheme. This invention achieves greater slope stability through slope reinforcement.

This invention relates to a method for correcting structural errors in reverse fault areas based on multiple iterations of the T0 trend surface, belonging to the field of geophysical exploration technology. The specific steps are as follows: Step 1 is data preparation; Step 2 is the creation of the T0 trend surface; Step 3 is the creation of the velocity surface; Step 4 is the creation of the structural map; Step 5 is the extraction of values ​​corresponding to all well points on the structural map and the calculation of absolute error using the error formula; Step 6 is the gridding of the absolute errors of all well points according to the T0 trend surface, and the addition operation is performed between the gridded data and the structural map from Step 4 to obtain the corrected structural map; Step 7 is the repetition of Steps 5 and 6 until the relative error reaches the threshold value specified by the national standard, at which point the calculation terminates. This invention fully utilizes the T0 trend surface as a trend guide for structural errors and uses the error threshold value as the termination condition for error iteration, thereby minimizing structural errors and effectively improving the accuracy of the structural map.

The invention relates to a method, a system, equipment and a medium for predicting the width of a fracture zone of a thrust fault, and the method comprises the following steps: obtaining original data which comprise geological data, seismic data and logging data; processing the seismic data to obtain a fault displacement and a fault section inclination angle of a thrust fault; processing the logging data to obtain a brittleness index; processing the geological data to obtain a region coefficient; and based on the fault displacement, the fault section inclination angle of the thrust fault, the brittleness index and the region coefficient, calculating to obtain the thrust fault fracture zone width. According to the novel method for quantitatively calculating the width of the thrust fault fracture zone after the two stratum parameters of the brittleness index and the thrust fault section inclination angle are considered, the lithologic brittleness and the thrust fault section angle are considered, the calculation precision is improved, and a good effect is achieved in calculating the width of the thrust fault fracture zone.

The invention belongs to the technical field of geophysical exploration, and discloses a seismic imaging method for a deep abrupt slope zone thrust fault, which comprises the following steps of: 1, solving a stratigraphic tendency of an area where the thrust fault is located, and constructing a stratigraphic dip angle model; secondly, according to the stratigraphic dip angle model, the stratigraphic trend is obtained, and a stratigraphic trend model is constructed; and a third step of constructing a three-dimensional pre-stack common-angle gather along the stratigraphic trend according to the stratigraphic trend model. And a fourth step of solving a migration velocity model along the stratigraphic direction by using the three-dimensional pre-stack common-angle gather, and performing common-angle domain migration imaging. And a fifth step of solving the residual ray time difference of common angle domain migration imaging, and adjusting the migration speed model. And a sixth step of re-performing common angle domain migration imaging according to the adjusted migration velocity model. The method can overcome the reflection interference phenomenon caused by the inclination angle, protects the reflection signal of the thrust fault of the high and steep inclination angle, eliminates the error of a speed model, and improves the imaging quality.

The application discloses a tunnel model experiment system and method for simulating fault dip-slip and strike-slip effects, can more truly restore the dynamic response of a tunnel crossing an active fault under the action of a strong earthquake and the action of an earthquake under faulting, can simulate faults with different faulting mechanisms, can simulate the properties of faults with strike-slip faulting (left rotation or right rotation) and dip-slip faulting (normal fault or reverse fault) at the same time, and solves the problem that a current traditional shaking table model box cannot simultaneously simulate different strike-slip faulting types and different dip-slip faulting.

The present application relates to the field of geological science, and particularly relates to a thrust fault structure simulation test system, which comprises a simulation box formed by two relatively slidable box bodies, the box body comprises a box bottom plate and oppositely arranged box side plates, the box side plates and the box bottom plate form a box frame; a baffle is arranged on the inner side surface of the box side plate, and the upper surface of the box bottom plate is provided with a stacking area; a stacking plate is placed on the stacking area, and the stacking plate comprises a plurality of mutually stacked push blocks; the system further comprises a force applying part for applying extrusion force to the box frame so that the two box bodies are close to each other; a driving part for relatively moving the two box bodies in the vertical direction; and an auxiliary part for applying an external force to each push block in the stacking plate periodically towards the inside of the simulation box. Through the device, the vibration change of the simulated stratum in the process of forming the thrust fault is closer to the damage condition of the real stratum in the process of forming the thrust fault, so that the result of the simulation test is more accurate.

The invention belongs to the technical field of geophysical exploration, and discloses a method for judging the impact direction of an asteroid of a falling pit in an underground coverage area, and the method comprises the steps: 1, obtaining a three-dimensional seismic data volume containing stratigraphic position information and fault information; step 2, identifying a falling pit at an asteroid impact high-incidence geological age horizon; step 3, acquiring the stratum age corresponding to the lowest upper superplane of the filling seismic facies of the troilt pit as the age when the troilt pit is formed, and recovering the paleostructural form of the troilt pit; 4, analyzing the three-dimensional morphological characteristics of the falling pit: if the plane form of the falling pit belongs to an ellipse, comparing the extrusion deformation degrees of the stratum at the edge of the falling pit in the short axis direction, and determining the edge with the larger extrusion deformation degree of the stratum; and 5, recognizing a thrust fault formed in the impact period at the edge with a relatively large stratum extrusion deformation degree, and judging the tendency of the thrust fault as the asteroid impact direction of the falling pit. The method can accurately determine the impact direction of the asteroid.

The application discloses a method and system for palaeogeomorphology recovery of reef flat facies, comprising: obtaining stratum boundary characteristics, stratum thickness and fault distribution characteristics according to depth domain seismic data of target reef flat facies stratum, then identifying synsedimentary faults and epigenetic reverse faults, and determining breakpoints matched with the epigenetic reverse faults and reverse fault repetition zones; dividing the epigenetic reverse faults into upper and lower plates, obtaining dip angle attributes of each plate at corresponding breakpoints, and further extending the boundaries of each plate with the breakpoints as starting points to obtain residual thicknesses of each plate, on the basis of which, the thicknesses of each plate are obtained in combination with the stratum boundary characteristics and the stratum thicknesses; respectively for the synsedimentary faults and the epigenetic reverse faults, displacement amounts and strike-slip components causing topographic repetition are obtained, and then the identified faults are integrated into the same coordinate system in combination with the thicknesses of each plate, so that corresponding palaeogeomorphology recovery results are obtained. The application can accurately realize palaeogeomorphology recovery of reef flat facies.

The application discloses a fault stick-slip motion test device considering the viscoelastic plasticity influence of a geological environment, which comprises a shell, a hydraulic push rod, variable constitutive relation members and stress transmission members in the shell; wherein the clamping plates of the two stress transmission members are opposite to each other, and the space between the two clamping plates is a placement cavity for a compression-shear sample; the transmission arms of the two stress transmission members are connected with four corresponding variable constitutive relation members, including three passive variable constitutive relation members installed and positioned on the shell, and one active variable constitutive relation member installed on the hydraulic push rod, and the adapter plate of the active variable constitutive relation member is installed with a displacement meter at the base of the hydraulic push rod; and the data of the displacement meter is collected and processed by a computer. The test scheme of the device simultaneously considers the active member and the passive member, the active stress and the passive stress loading forms in the fault are clear, and the loading state of the reverse fault in the actual situation is more suitable.

This invention provides a method and apparatus for distinguishing between knee faults and faults, comprising: acquiring seismic data of a target area, the seismic data including the geometric characteristics of seismic wave groups; obtaining a seismic profile based on the seismic data, the seismic profile including folds composed of multiple strata; identifying a template stratum and multiple extension lines in the multiple strata, the template stratum being a continuous, unbroken, high-peak reflection layer; identifying multiple extension layers in the seismic profile based on the template stratum and multiple extension lines; and outputting a determination result based on the geometric characteristics of the seismic wave groups and the geometric characteristics of each extension layer. The method for distinguishing between knee faults and faults of this invention directly and accurately determines whether a compressional structural zone in the oil and gas exploration process is a knee fault, a high-angle thrust fault, or a regulating fault using seismic data. This ensures the accuracy of seismic detection, provides important guidance for the deployment of oil and gas exploration and development drilling, and improves the success rate of oil and gas exploration drilling.