An Experimental Method for Physical Simulation of Fault Formation and Evolution Process

Abstract

The invention provides a physical simulation experiment method for a fault formation and evolution process. Equipment comprises a camera device (1), a model cabin, a hydraulic device, a control device, and a particle imaging speed measurer (2). The interior of the model cabin is provided with an organosilicone canvas (4) and a brittle rock (5), and the camera device (1) is disposed above the modelcabin. The particle imaging speed measurer (2) is disposed in front, and the control device controls the experiment operation. The method comprises the experiment steps: S1, randomly selecting a hydraulic cylinder fixing model cabin in a hydraulic system, wherein the other hydraulic cylinder extends to be provided with the organosilicone canvas (4); S2, collecting a motion phenomenon image of thebrittle rock (5); S3, recording a motion process of the brittle rock (5); S4, gridding a recorded experiment region; S5, analyzing the data to obtain an experiment result. The method achieves the deduction of the complete characteristics of the change of the fault inclination angle and fault displacement with time through the analysis of the data recorded by the particle imaging speed measurer (2), and solves a problem that a geologic construction physical simulation experiment is insufficient in spatial resolution and temporal resolution.

Description

technical field [0001] The invention relates to the field of structural geology, in particular to a physical simulation experiment method for fault formation and evolution process. Background technique [0002] Structure refers to the deformation and displacement of rock mass or rock formation under the action of geological forces. A fault is a structure in which a rock mass or rock formation undergoes significant displacement along a fault plane, and is a ubiquitous geological phenomenon. During the formation of oil and gas, fault planes and fault-associated fractures (fault zones) in oil-gas-bearing basins can provide seepage channels and storage spaces for oil and gas migration and storage; faults can block oil and gas migration and form faults Trap, which prevents the spread of oil and gas and provides a place for oil and gas to accumulate. On the other hand, under the action of geological force, the ground stress in the fault plane gradually increases, and the energy ...

AI Technical Summary

Problems solved by technology

[0003] At present, based on the study of geological structure deformation, the method that can intuitively and visually simulate the formation and evolution process of faults is the physical simulation experiment of geological structure. However, the traditional physical simulation experiment of geological structure focuses on the visualization of the simulated fault formation and evolution process, and photo processing methods are generally used. Analyze the formation and evolution process of faults, use ordinary cameras to take photos to record the formation and evolution process of faults, suspend the experiment and measure the dip angle and distance of the fault in slices, etc., it is impossible to continuously measure and consider the details of the change of dip angle and distance of the fault, and the practice of suspending the experiment also destroys The continuity of the experiment and the authenticity of the simulation. Furthermore, there is no specific analysis process for the experimental data, which reduces the credibility of the simulation experiment for the outside world.

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