34 results about "Thrust fault" patented technology

The present invention discloses a test device for simulation of near-fault seismic oscillation initiated by reverse fault strike-slip movement. The device comprises a cube structure test box body with an opening at the upper surface, and a movable baffle plate is arranged at the lower portion of the surface of one side of the test box body; the upper portion of the movable baffle plate is provided with an embedded plate extended into the test box body, and the movable baffle plate can slide along the embedded plate and the lower surface of the test box body; the test box body is internally provided with a simulation fault communicating the upper surface and the lower surface; a simulation tunnel passing through the simulation fault is arranged at the upper portion of the internal portion of the test box body; an upper disc is arranged between one side, close to the movable baffle plate, of the simulation fault and the inner surface of the test box body, and a lower disc is arranged between one side, far away from the movable baffle plate, of the simulation fault and the inner surface of the test box body; and a plurality of serial pressure-sensitive micro-explosion devices are arranged at the lower portion of the simulation tunnel in the simulation fault. The test device for simulation of near-fault seismic oscillation initiated by reverse fault strike-slip movement can really simulate the seismogenic mechanism of the near-fault seismic oscillation under the effect of the simulation reverse fault strike-slip effect, the test result is accurate, and the cost is low.

The invention discloses a Delaunay triangulation network subdividing method based on space curved surface constraint. The method comprises the following steps of: rebuilding a space fractured layer curved surface by fractured layer data; initially rebuilding layer positions to acquire a space triangular curved surface; finding out a space triangle which crosses over the fracture surface in the area in which a reverse fracture layer exits and deleting the space triangle; filling a hole or a gap formed by deleting the triangle to ensure that a boundary of the space triangulation network is a convex shell or the edge generated by filling the edge of the area concave at random cannot cross over the fracture surface. The method has the active effects that a triangular part of the three-dimensional curved surface under the space curved surface constraint is proposed, so that the ground layer rebuilding problem under a complicated geologic structure condition is solved, and a technical support is provided for interpolation of layer positions, drawing of contour lines and the like.

The invention discloses an interval velocity model building method under complicated geological conditions, firstly solves the problem of time dimension fitting under complicated terrain conditions and also solves the problems of interval velocity filling and speed modeling on the basis of the solving of the problem of time dimension fitting. The interval velocity model building method disclosed by the invention has the following positive effects: in the interval forming process, data is pretreated by utilizing the concepts of grid and hanging wall and footwall of faults, the concept of group of faults is also introduced, so that an interval time model is built more efficiently; a certain number of primary interval velocity data is utilized to fit the velocities of the hanging wall and the footwall of the faults more accurately, so that a more accurate velocity model is obtained.

The invention relates to an automatic forward and reverse fault isoline generating method based on the enhanced rectangular grid. The automatic forward and reverse fault isoline generating method includes steps of establishing intersection topological relation between fault polygons according to given seismic horizons and fault polygon data, configuring the enhanced rectangular grid on the basis of fault polygon intersection topological relation, partitioning a horizon data point set on the basis of rectangular grid data structure of the intersection topological relation and projecting data to a computing grid unit, establishing a discrete smooth interpolation equation, forming an overall discrete smooth interpolation linear equation system by local discrete smooth interpolation equations of all nodes, iteratively solving to obtain interpolation faults indicated by the enhanced grid for tracking and generating the isoline. The automatic forward and reverse fault isoline generating method based on the enhanced rectangular grid solves the problem of handwork interaction in constructing images of many reverse faults, especially repeated overthrusts and overcomes the problems of low accuracy and efficiency in the prior art and complexity of repeated overthrusts or inaccurate results.

The invention discloses a method and device for simulating formation of reverse faults in a laboratory, and relates to the technical field of coal mine geology. A structure principle of traditional fault simulation experimental equipment is changed, a fault induction device is designed on the bottom of the interior of the equipment, and the role of inducing crack initiation of the faults is playedunder the conditions of upper pressing and lateral pressing; the position of the induction device can be adjusted and changed at any time, and formation process information of the simulated reverse faults with different inclination angles is obtained; the induction device is arranged on an elastic leather cushion, and the elastic leather cushion is connected with left and right compression steelplates into one whole, and the friction between a simulated formation material and a base is reduced in the process of lateral pressing. When the similar simulated formation material is laid, stress sensors are laid at a certain distance, stress changes are recorded in real time, and a transmission action mechanism of the faults to mining-induced stress is explained. The formation process of the reverse faults can be reproduced, the stress redistribution characteristics of a fault area after mining is mastered, and the influence of the existence of the reverse faults on mining is reflected.

The invention discloses an online single-shot thrust fault diagnosis method for a carrier rocket. The method comprises the following steps: S100, establishing a carrier rocket state equation based onthe attitude kinematics and kinetic equation of the carrier rocket, widening the band identification quantity into the state quantity, and establishing a corresponding number of system state equationsand measurement equations for fault diagnosis of the single-shot thrust of the carrier rocket according to the actual number of the single-shot thrust of the carrier rocket; S200, in the real-time flight process of the carrier rocket / missile, estimating the single-shot thrust of the carrier rocket by using unscented Kalman filtering, and obtaining an estimation error and a covariance matrix; andS300, performing probability matching calculation by using the error and the covariance matrix to realize thrust fault positioning and obtain the output thrust of a faulted engine. The method has theadvantages of being simple in structure, simple in design process, high in convergence speed and high in identification precision, and therefore the method has wide application prospects in carrier rocket single-shot thrust fault diagnosis.

The invention discloses a point cloud clipping-based generation method for a spatial curved surface. A curved surface can be reconstructed under a complex reverse fault condition, a data blocking concept is used for dividing data on the curved surface into data under a constraint condition and data beyond the constraint condition, and triangularly meshing the data respectively, so that the problem of large data volume is well solved, and triangular meshing speed is increased. The method has the advantages that various faults comprising normal faults and reverse faults are supported, so that the method has high adaptability; various kinds of application taking complex polygons as constraint conditions are supported, so that the method is highly universal; and the clipping problems of the complex polygons are solved.

A method for monitoring a thrust fault of a turbofan during a modification of the thrust setting of the turbofan, the method including a step of processing the thrust setting via a filtering function and a transient-phase model such as to obtain a modelled thrust, a step of comparing the modelled thrust to the actual thrust such as to determine a thrust difference, a step of comparing the thrust difference to an alarm threshold; and a step of emitting an alarm in the event of exceeding the alarm threshold, wherein at a given iteration, in which the prior modelled thrust is known, the transient-phase model provides a time constant in accordance with the prior modelled thrust, and the filtering function provides a modelled thrust in accordance with the time constant obtained, the prior modelled thrust and the thrust setting.

The invention discloses a multi-dimensional fault dynamic demonstration model device, which belongs to the field of geology model demonstration devices. The multi-dimensional fault dynamic demonstration model device comprises a base; the base is sequentially provided with a transverse adjustment mechanism, three groups of vertical displacement adjustment mechanisms and an angle displacement adjustment mechanism respectively; the transverse adjustment mechanism, the three groups of vertical displacement adjustment mechanisms and the angle displacement adjustment mechanism are respectively provided with a strike-slip fault adjustable mobile support, three groups of normal fault-reverse fault adjustable mobile supports and an over-thrust adjustable mobile support arranged in sequence; and upper ends of the strike-slip fault adjustable mobile support, the three groups of normal fault-reverse fault adjustable mobile supports and the over-thrust adjustable mobile support are sequentially and correspondingly provided with fault regions processed and formed through plastic material. An inflexible and abstract previous fault geologic model demonstration process can be avoided, time and space changes, a force-bearing process and a development result of the fault happening process are represented intuitively, and the multi-dimensional fault dynamic demonstration model device can be applied to teaching demonstration for college mineral and geology specialty and popular science education demands for children.

The invention provides a method used for characterizing a small and medium sized extension rift basin growth reverse fault, which belongs to the technical field of geological prospecting. The method comprises the steps that the data of an area to be identified are collected and processed; sequence division is carried out under the guidance of a sequence stratigraphy theory, and an isochronal sequence stratigraphic framework of the area to be identified is established; under the constraint of the isochronal sequence stratigraphic framework of the area to be identified, construction-stratigraphic linkage interpretation is carried out, and positive and reverse faults are identified and classified; stratigraphic-sedimentary linkage interpretation is carried out on classified positive and reverse faults; a pseudo fault which is mistakenly identified is rejected, and a fault framework of the area to be identified is established; construction-sedimentary linkage interpretation is carried out on positive and reverse faults in the fault framework of the area to be identified; a growth fault construction framework is established, and a growth reverse fault in the framework is determined; a tectonic geologic model of the growth reverse fault and the derivative tectonic geologic model are built; and the cause of the growth reverse fault in each tectonic geologic model is analyzed to guide oil and gas exploration of the area to be identified.

The invention relates to a method for monitoring the activity state of an underground fault, and belongs to the technical field of mining disaster monitoring. The method comprises the steps that an observation chamber is dug in a forward fault footwall or a reverse fault upper wall at first; horizontal medium-length holes are distributed in the observation chamber, the medium-length holes penetrate through the fault surface by a certain distance, and multipoint extensometers are mounted in the medium-length holes; an anchor rod multipoint stress detector, a drilled hole multipoint stress detector and a micro-seismic monitoring system are mounted on the position perpendicular to the fault surface; the displacement changes of the upper wall and the footwall of the fault, the additional tensile stress states of different positions away from the fault surface, additional shear stress states of different positions away from the fault surface, broken positions in the mining activity process and area data information of the fault can be monitored by collecting and processing the data in real time, and then the data are directly transmitted to a ground surface monitoring center. The method can monitor the displacement changes of the upper wall and the footwall of the fault, the states of additional tensile stress of the different positions away from the fault and perpendicular to the fault surface, the states of additional shear stress parallel to the fault surface, and the like in real time.

The invention provides a method for distinguishing a hanging wall and a footwall of a fault in an oilfield development zone. The method comprises a step of obtaining drilling well hierarchical data, a step of creating a hanging wall data file and a footwall data file based on the drilling well hierarchical data in the condition that the fault is a reverse fault, wherein the hanging wall data file comprises hierarchical data of only drilling a formation for one time and hierarchical data with a smaller depth in the hierarchical data of drilling the formation for two times, and the footwall data file comprises hierarchical data of only drilling a formation for one time and hierarchical data with a larger depth in the hierarchical data of drilling the formation for two times, a step of projecting the hierarchical data in the hanging wall data file into a seismic data interpretation system, and identifying the fault position corresponding to the hanging wall of the fault, a step of projecting the hierarchical data in the footwall data file into the seismic data interpretation system, and identifying the fault position corresponding to the footwall of the fault, and a step of distinguishing the hanging wall and footwall of the fault of a no-well zone according to the seismic reflection characteristic of a breakpoint identified in a well area.

The invention provides a method for carrying out horizon interpolation on three-dimensional seismic interpretation under the condition of a reverse-fault containing complex geological structure, which comprises the following steps: carrying out interpolation on horizon points which are not leaped by a reverse fault; carrying out interpolation on horizon points which are leaped by the reverse fault; assembling the horizon points subjected to interpolation into horizon sections in xline and inline directions, and then forming a horizon surface; and after implementing the action of horizon section assembling, storing horizon data into a work region in a file form.

The invention discloses a seismic attribute extracting method for a geologic structure containing an over-thrust fault. The method comprises the following steps of: (a) performing geologic horizon interpretation and fault interpretation by using an over-thrust fault-containing seismic interpretation method; (b) connecting a corresponding geologic horizon and a corresponding fault to form a new horizon; (c) performing upper and lower layer connection on the new horizon along the position of the fault to form a closed fault block or horizon connection; and (d) calculating the seismic attribute according to the formed fault block and horizon. Because the upper and lower walls of the horizon can be simultaneously calculated by the method, at least 1 / 2 of workload can be saved; and because thedata of the lower wall of the horizon is reliable and can be used for predicting a reservoir stratum, the predictable area is enlarged. The boundary of the reservoir stratum controlled by the fault is obvious. The method can solve the problem of over-thrust fault-containing seismic attribute extraction, and has direct effect on reservoir stratum prediction, oil gas detection and the like in corresponding oil gas exploratory development.

The invention discloses a thrust fault construction physical simulation experiment device. A formation model is arranged on a fixed flat plate. Clamp slots are arranged on front and rear ends of the fixed flat plate. A movable plate fixing seat is embedded in each clamp slot. A movable plate is arranged on each movable plate fixing seat, and the movable plate fixing seat is hinged with the movable plate. A motor and a screw are arranged on the bottom end in the experiment device table, and are corresponding to circular holes in the fixed flat plate. The motor is connected with the screw. A push rod is arranged on the upper end of the screw. The push rod is connected with the screw. A rotating gear is arranged in the experiment device table. A linear rack which matches the rotating gear is arranged on the upper end of the rotating gear. The rotating gear is connected with the motor. According to the invention, the state demonstration of the phenomena of wrinkles, breaks and the like caused by mutual compression between the screw rod and the push rod and between the formation model driven by gear and the rack and the movable plate is realized; the device has the advantages of safe and simple operation and high visibility; and the whole evolution process is easily observed.

The invention provides a drawing method for an isoline containing a reverse fault, which comprises the following steps: dividing the inner and peripheral data of the polygon of a fault; carrying out triangulation to data by a space gridding algorithm to obtain a final triangulation network; and tracking the isoline for the final triangulation network. A structural map drawn with the method has the advantages of good effect and high precision, the footwall information of the reverse fault can be drawn, and the drawing problem of the structural mp containing the reverse fault can be effectively solved.

The invention discloses a complex geological structure seismic fault image processing method based on a fault bifurcation structure model. The new structure of fault bifurcation is introduced on the basis of the two structures of horizon and fault introduced in traditional structural interpretation, which can be easily It can well complete the interpretation of complex geological structures containing reverse faults or even multiple reverse faults, and at the same time improve the accuracy of fault image processing in the interpretation of seismic structures containing reverse faults. The invention aims to solve the technical problems of heavy workload and low accuracy in fault image processing of the horizontal interpretation method for geological structures containing reverse faults existing in the prior art.

The invention discloses an apparatus for simulating the fracture of a thrust fault. The apparatus comprises a loading device, a supporting device, a testing device, an auxiliary device and a fault model device; fault fracture induced pulse research is carried out with a physical model experiment; and the characteristics and spatial distribution rules of pulse seismic oscillation generated by different seismogenic fault types and different fault parameters are disclosed, so that a seismogenic fault type-based pulse seismic oscillation characteristic model is established. According to the priorart, due to the uncertainty of seismic oscillation and the constrain of observation technologies, the records of impulse type earthquakes obtained in actual earthquakes are not enough to accurately obtain the characteristics of near-fault impulse type seismic oscillation statistically. With the apparatus of the invention adopted, the above problem can be solved; pulses generated by different partsof the fault during the fracture of the thrust fault can be studied; and pulse characteristics and distribution rules during the fracture of the fault are recorded.

The invention provides an ancient landform recovery method and device for eliminating reverse fracture influence, and the method comprises the steps: determining a top interface and a bottom interface of a target layer according to three-dimensional seismic data; selecting the stratum with the reverse fracture repeated section from the target stratum; not carrying out tracking interpretation on the screened stratum with the reverse fracture repeated section; performing tracking interpretation on the remaining strata in the target stratum, and determining a top interface and a bottom interface of the target stratum after tracking interpretation; according to the top interface and the bottom interface of the target layer after tracking interpretation, determining the thickness of the reverse fracture repeated section stratum; and determining the ancient landform according to the thickness value of the reverse fracture repeated section stratum, the top interface of the target layer and the bottom interface of the target layer. According to the method and device, the illusion that the thickness of the stratum is increased due to the dislocation effect of the reverse fault on the stratum is considered, the top surface and the bottom surface of the stratum are determined by utilizing seismic data, so that the thickness of the stratum is calculated, and the ancient landform is accurately recovered.

The invention relates to an ancient landform recovery method for an extruded basin, and belongs to the technical field of exploration and development. The method comprises the steps of obtaining seismic data of a target area, and determining a reference surface; performing tracking interpretation on an unconformity surface and a reference surface in a target stratum by using seismic data to obtain depth data of the top / bottom of the target stratum and a reverse fault of a target area; dividing the target layer into a plurality of fault blocks by taking the reverse fault as a boundary, and calculating thickness data of each fault block; selecting a section and determining the nail block to perform balanced section recovery to obtain the horizontal displacement of other fault blocks relative to the nail block; performing coordinate homing calculation on the thickness data of other fault blocks according to the horizontal displacement; and splicing and mapping the thickness data after coordinate homing to complete the restoration of the ancient landform. According to the method, coordinate homing calculation is carried out on the thickness data of each fault block according to the horizontal displacement, so that the influence of stratum stacking on stratum thickness calculation is eliminated, and the accuracy and precision of ancient landform recovery of the extrusion basin are greatly improved.