21 results about "Normal fault" patented technology

The invention discloses a dislocation angle adjusting structure of a fault dislocation simulation experiment device, which comprises a rectangular shell, and one end of the shell is provided with a support groove for supporting a first test box for simulating positive and reverse faults; one end of the rectangular shell is provided with a moving groove, the other end of the rectangular shell is provided with a moving groove, the second test box is used for horizontally moving a simulated translation fault, V-shaped grooves are formed in symmetrical positions of two sides of the rectangular shell, and an embedded adjusting rod is used for adjusting a dislocation angle; the mechanisms are respectively used for simulating lifting motion of a positive fault and a negative fault, adjusting a fault dislocation angle and horizontal motion of a translation fault, through the synergistic effect of the mechanisms, the simulation of various fault types (the positive fault, the negative fault and the translation fault) can be realized, and the advantages of high precision and automatic control are realized; the universality and the flexibility of the experimental device are remarkably improved, and more comprehensive and more reliable experimental support is provided for researching the influence of fault movement on an engineering structure.

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 oil and gas bearing basin favorable exploration zone research, and particularly relates to a method and device for evaluating favorable zones based on dynamic evolution of fault properties and effects. The evaluation method comprises stress field characteristic analysis, structural profile characteristic analysis, basin structure analysis, fault system and structural pattern characteristic analysis, favorable zone selection and exploration target selection steps. The present application considers that under the superimposed action of multiple phases, different directions and different properties of stress, the properties of faults (reverse faults, normal faults, strike-slip faults) also undergo alternating evolution of waxing and waning, and the effects of different properties of faults on oil and gas transport, reservoir fracture structure, oil and gas sealing and preservation also differ. The present application analyzes the property evolution of faults and their control effect on oil and gas reservoirs from the perspective of spatiotemporal dynamic evolution, and predicts favorable exploration zones, thereby indicating the direction for fine exploration.

This application relates to the field of geological structural analysis technology, specifically to a method, apparatus, and electronic equipment for determining the stage of horizontal slip distance. It solves the problem in existing technologies that the horizontal slip distance cannot be quantitatively calculated in stages during the development stages of overlying en echelon normal faults and underlying vertical strike-slip faults. First, the layering characteristics of the strike-slip fault profile in the area to be measured are determined based on 3D seismic data. Then, based on the layering characteristics of the strike-slip fault profile, the main active stratigraphic system of the strike-slip faults in the area is determined. Finally, the planar distribution of the underlying vertical strike-slip faults and overlying en echelon normal faults in the caprock-draggered strike-slip fault is determined based on relevant attribute maps. Based on this, and combined with the formation theory of overlying en echelon normal faults in caprock-draggered strike-slip faults, the inherent relationship between the cumulative fault displacement of the en echelon normal faults and the horizontal slip distance of the strike-slip fault is used to achieve quantitative estimation of the staged horizontal slip distance of multi-stage active caprock-draggered underground strike-slip faults.

This application provides a method, apparatus, and medium for determining the evolution process of folds propagating along marine normal faults, relating to the field of fault seismic assessment. The method includes: determining a seismic profile and its characteristic data based on raw data of a target seafloor area; determining, based on the characteristic data of the seismic profile, the basement interface, seafloor surface, multiple stratigraphic interfaces, characteristic points corresponding to the basement interface and seafloor surface, and evaluation parameters for each stratigraphic interface within the seismic profile; creating a triangular shear deformation range based on the characteristic points corresponding to the basement interface and seafloor surface; and determining the evolution process of folds propagating along normal faults based on the evaluation parameters corresponding to each stratigraphic interface within the triangular shear deformation range. This application, by acquiring high-resolution seismic reflection data, identifies anomalous deformation characteristics during fold growth, which often correspond to fault activity periods or paleoseismic events.

The present application relates to a kind of two-dimensional seismic velocity model automatic generation method and system in petroleum exploration, it includes: with diversity training sample to generate curved interface with combination linear function, sine function, based on stratum parameter generated by random number generator automatically generates two-dimensional layered velocity model;Extract the shape of multiple mushroom images as the basic form of salt dome, and after the basic form of salt dome is handled in posture, superimpose one of the mushroom images on the two-dimensional layered velocity model that rises upward, generate salt dome two-dimensional velocity model;With two-dimensional layered velocity model as basis, generate normal fault and reverse fault, construct two-dimensional fault velocity model;Determine the similarity between all two-dimensional layered velocity model, salt dome two-dimensional velocity model and two-dimensional fault velocity model, eliminate high similarity velocity model, obtain the diversity of two-dimensional seismic velocity model.The present application can provide the diversity of data guarantee for data-based seismic velocity inversion;In the field of oil and gas exploration.

The application discloses a normal fault dislocation and earthquake time sequence coupling simulation test device and method in a supergravity environment, and the method comprises a rigid model box, a fault dislocation system, two normally closed electromagnetic valves, a manual hydraulic pump and a hydraulic oil pipe, wherein the fault dislocation system is arranged in the rigid model box; the two normally closed electromagnetic valves and the manual hydraulic pump are arranged outside the rigid model box; the manual hydraulic pump is connected with the two normally closed electromagnetic valves through the hydraulic oil pipe, and the two normally closed electromagnetic valves are connected with the fault dislocation system through the hydraulic oil pipe. The application realizes high-precision reproduction of the dynamic response of a rock-soil body and the structural disaster process under the time sequence coupling effect of fault dislocation and earthquake vibration by integrating a centrifuge supergravity field, a vibration table earthquake vibration simulation and a fault dislocation system, and provides an advanced test platform for studying the surface deformation law caused by fault dislocation and the coupling disaster mechanism of rock-soil engineering structures such as a roadbed, a slope and a tunnel.

This disclosure relates to the field of seismic imaging technology, and particularly to a normal fault modeling and seismic imaging method, device, and computer-readable storage medium. The method involves constructing a geological model containing a granular aggregate, setting initial conditions for the geological model based on information about the normal fault, simulating deformation of the geological model based on applied deformation conditions to obtain a dynamic model of the structural deformation of the normal fault, acquiring the volumetric strain distribution characteristics along the fault deformation zone based on the dynamic model, determining the acoustic characteristic parameters corresponding to the dynamic model based on the volumetric strain distribution characteristics, and determining the seismic profile image of the normal fault based on the acoustic characteristic parameters. This allows for the acquisition of seismic profiles of simulated normal faults, thereby enabling further research on seismic wave propagation patterns and imaging characteristics.

The application provides a tunnel test device for simulating stick-slip initiation near-fault ground motion of a normal fault, which comprises at least two groups of interval arranged explosion assemblies, a baffle, a tunnel model, a model box and a first simulated stratum, a second simulated stratum and a third simulated stratum assembled in the model box. The model box is provided with an opening, the baffle is clamped at the opening position to block the second simulated stratum; the side of the second simulated stratum far from the opening is higher than the side of the second simulated stratum close to the opening, and separates the first simulated stratum and the third simulated stratum; the tunnel model passes through the first simulated stratum, the second simulated stratum and the third simulated stratum; the explosion assembly is arranged below the tunnel model; the explosion assembly is provided with a first lead wire, an explosive and a driven block for detonating the explosive, the driven block is arranged in the second simulated stratum and connected with the explosive, and the side of the explosive far from the driven block is connected with the model box through the first lead wire.

The utility model discloses a kind of double-arch tunnel test devices simulating normal fault dislocation, belong to tunnel anti-seismic technical field, including left half box, right half box, left arch tunnel, right arch tunnel, the left half box, right half box side is provided with sliding surface, the left half box outside is provided with base, the base side is connected with loading device, the loading device is fixedly connected in base inner wall;The utility model is opened in fixed box body with the first installation hole similar to the appearance of double-arch tunnel, can carry out test to double-arch tunnel, by setting movable left half box fixed right half box sliding surface, and by longitudinal pushing to left half box, the longitudinal dislocation of double-arch tunnel in crossing normal fault can be simulated, to facilitate the simulation test for double arch or continuous supply, more widely.

The present invention provides a method for leaving a normal fault protection coal pillar considering residual tectonic stress, which relates to the technical field of coal mine mining. The method includes: S1. Determining the position of the open-off cut of the working face and the mining direction according to the geological conditions; S2. Determining the geometric similarity ratio, density similarity ratio and strength similarity ratio of the similar material model, and simulating the distribution laws of the displacement field and stress field after the formation of the normal fault; S3. Determining the width L1 of the normal fault protection coal pillar in the similar material simulation test according to the maximum coal pillar width at the time of stopping mining; S4. Conducting a similar material simulation comparison test for prefabricating the normal fault and forming the normal fault protection coal pillar to determine the influence of the tectonic stress on the normal fault protection coal pillar; S5. Using PFC numerical simulation to carry out the simulation of the formation of the normal fault and determining the width L2 of the protection coal pillar; S6. Determining the width of the on-site protection coal pillar according to the results of the similar material simulation and numerical simulation, and monitoring the support resistance of the working face and the deformation amount of the surrounding rock of the roadway to ensure the safety of mining.

The embodiment of the present invention discloses a method, device, equipment and medium for establishing a three-dimensional velocity model of the hanging wall of a normal fault. The method includes: obtaining seismic interpretation data of a target area; slicing the target layer segment of the target area according to a preset time interval and dividing grid points in each time slice; determining the fault line of each time slice according to the seismic interpretation data; based on each fault line, calculating the velocity value of each target grid point in the hanging wall area of ​​the fault in each time slice according to the virtual baseline velocity of a preset virtual baseline, and establishing a time domain three-dimensional velocity model based on the velocity value. By comprehensively considering factors such as the change in fault throw and the distance of the velocity gradient from the fault, a reasonable prediction of the velocity of the hanging wall area of ​​the fault under the condition of fault throw change is achieved, thereby solving the problem of inaccurate velocity of the hanging wall of the normal fault in the comprehensive structural interpretation and meeting the requirements for time-to-depth conversion velocity accuracy in drilling and reserve calculation.

The invention discloses a contrast method and system based on stratums of a constricted area of a co-sedimentary normal fault, and the method comprises the steps: determining the extension stress occurrence time and period of the area based on the research information of a to-be-measured area; establishing a three-level sequence isochronous stratigraphic framework in each basin or pit in the same structural domain according to the occurrence time and period of the extension stress; counting the number and thickness data of co-deposited normal faults in each sequence in each basin or pit; describing the growth process of the synsedimentary normal fault by using a growth index method; based on the growth parameters, establishing a time sequence for forming a synsedimentary fault, and determining the fault development time in combination with a region stretching stress period; based on the development time, determining the deposition time of the located stratum; and performing regional isochronous stratigraphic framework comparison according to the deposition age. The problems of lack of dating data, low precision of stratigraphic unconformity and other constructions and large lithology change of cross-regional or basin strata are avoided, and the effect of isochronous stratigraphic comparison in the same structural domain is achieved.

The invention discloses a method for selecting a reserved section of a normal fault coal pillar, which belongs to the technical field of normal fault area coal pillar reservation, and realizes precision and scientization of section selection through a closed-loop process of classification and screening of drilling data, multi-factor quantitative matching, dynamic judgment of a dangerous section and segmentation adaptation verification. The method comprises the following specific steps: collecting normal fault geological parameters and drilling data, and screening an effective coal seam-aquifer interlayer spacing according to a drilling penetration state; calculating the absolute value of the difference value between the fault fall and the effective interlayer spacing, and judging the most dangerous section in combination with a preset safety threshold value; executing the process on the long extension fault sections, and determining each section of target section; and iteratively optimizing the parameters through mining feedback data. The method breaks through the limitation of traditional single-factor decision, improves the accuracy of section selection, effectively reduces the risk of water inrush accidents, reduces the waste of coal pillar resources on the premise of guaranteeing safety, and provides key technical support for refined mining of a normal fault area of a coal mine.

The application provides a plain area hidden active fault normal fault creep induced surface deformation prediction method, device, equipment and storage medium, relates to the hidden fault activity technical field. The method comprises the following steps: based on the three-dimensional simplified geological model of the hidden normal fault and its adjacent area; taking the fault creep rate as the displacement boundary condition, simulating the surface vertical deformation induced by the hidden normal fault normal fault creep, obtaining the surface vertical deformation characteristics and dividing the surface deformation zone from the hidden normal fault; according to the action law of fault dip angle, creep time and creep rate on the spatial distribution of surface vertical deformation, fitting and constructing the prediction model of normal fault creep induced surface vertical deformation. The application proposes a multi-parameter prediction model covering fault dip angle, creep rate and creep time, and realizes disaster prediction caused by creep activity of hidden fault in plain area.

The invention discloses an extrusion type basin normal fault identification method and device, and the method comprises the steps: building a spatial distribution pattern of a regional reverse fault based on a three-dimensional seismic data body after the inner horizon calibration of an extrusion type basin, and enabling the spatial distribution pattern to be used for determining the main trend of the regional reverse fault; the method comprises the following steps: under the background that an extrusion basin is in a compressive-torsional stress field, carrying out stress decomposition on the maximum principal compressive stress of a region to obtain a tensile stress component parallel to a main trend, and taking the tensile stress component as an optimal direction for normal fault identification; in the three-dimensional seismic data volume after horizon calibration, selecting an initial seismic section of which the orientation is parallel to a preferred direction, and executing small-interval translation scanning and / or small-angle rotation scanning on the initial seismic section to generate a series of scanning sections; and positioning the target position of the fault on a series of scanning profiles, and judging whether the hanging wall stratum moves downwards relative to the footwall stratum or not at the target position, and if so, identifying the fault as a normal fault. According to the invention, the normal fault of the extrusion basin can be accurately identified.

The present application belongs to the technical field of petroleum exploration. The present application discloses a method for determining the geological age of the thrust structure extrusion revival of the buried hill in a faulted basin, comprising: determining the trend of the top surface of the buried hill and the regional normal fault on the three-dimensional seismic data volume of the faulted basin after three-dimensional median dip filter processing. Determining the thrust fault on the seismic profile which is basically parallel to the trend of the regional normal fault. Identifying the thrust fault anticline structure according to the morphological characteristics of the top surface of the buried hill. Identifying the slope edge seismic facies, the onlap unconformity seismic reflection interface and the seismic reflection interface corresponding to the fault throw disappearance point of the thrust fault on the overlying strata of the footwall of the thrust fault. Determining the starting time and the ending time of the extrusion revival of the thrust fault, and determining the geological time stage between the starting time and the ending time as the geological age of the thrust structure extrusion revival of the buried hill in the faulted basin. Through the above method, the thrust structure of the buried hill in the faulted basin and the geological age of the extrusion revival thereof can be accurately identified.

The utility model discloses a fault dislocation testing device which comprises a vibration table, a model box is arranged on the vibration table, an inclined sliding rail is arranged on the inner wall of the model box, a first soil body containing space and a second soil body containing space which are communicated with each other are arranged in the model box, and a dislocation disc in sliding fit with the inclined sliding rail is arranged in the first soil body containing space. An inflation expansion mechanism is arranged at the bottom of the dislocation disc and used for pushing the dislocation disc to slide along the oblique sliding rail, so that the soil body on the dislocation disc ascends and descends relative to the soil body in the second soil body containing space, and the fault dislocation effect is achieved. According to the utility model, the dislocation of a normal fault and a reverse fault at a certain distance during vibration can be well simulated, and the problem that the dislocation of a fault in a cross-fault slope during vibration cannot be simulated in a conventional slope seismic oscillation response vibration table test is solved. The structure is simple, and a new solution is provided for fault vibration research.

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 invention belongs to the technical field of physical simulation of geological disasters, and particularly relates to a seismic landslide simulation test device coupling fault dislocation and pulse vibration. The model box system comprises a vertical dislocation model box and a horizontal dislocation model box, and an opening in the rear side of the vertical dislocation model box is opposite to an opening in the front side of the horizontal dislocation model box; the driving system comprises a high-thrust vertical actuator and a high-thrust horizontal actuator, the high-thrust vertical actuator is in transmission connection with the vertical dislocation model box, and the high-thrust horizontal actuator is in transmission connection with the horizontal dislocation model box. The real fault dislocation load and the speed pulse load can be synchronously loaded, and the dislocation and vibration double-field coupling seismic effect of the real seismic fault can be simulated through the linkage of the fault disc dislocation and the pulse vibration. The device can be used for synchronously coupling dislocation and pulse effects of complex earthquake faults such as left-handed strike-slip and backlash, left-handed strike-slip and forward breaking, right-handed strike-slip and backlash, right-handed strike-slip and forward breaking and the like on the landslide.

The invention discloses a simulation method for generating positive and reverse fault surfaces with inclination angles, which uses a dislocation type fault simulation test device and comprises the following steps of: S1, determining a vector relationship between vertical displacement z and horizontal displacement x according to a target fault inclination angle theta, and satisfying tan theta = z / x; s2, independently controlling a lifting cylinder and a translation cylinder of the device, respectively inputting displacements z and x, and driving a lifting model box and a translation model box to move along the vertical and horizontal directions in a staggered manner; s3, regulating and controlling the fracture path of the test soil body through the synthetic effect of the displacement vector, generating an inclined through fracture surface matched with theta, and simulating the normal fault or reverse fault activity; according to the method, the bottlenecks of a traditional method in the aspects of inclination angle control, data continuity and engineering applicability are broken through, a high-precision and high-efficiency technical means is provided for fault activity mechanism research and engineering disaster prevention design, and the method has important academic value and wide application prospects.