Underground water-sealing oil storage cavern micro-seismic monitoring method and system

Abstract

The invention relates to an underground water-sealing oil storage cavern micro-seismic monitoring method and system. The method includes determining an underground water-sealing oil storage cavern micro-seismic monitoring system configuration based on the engineering requirement and implementation condition; performing event triggering by determining the micro-seismic signal output by a detector array by means of a threshold algorithm and an STA / LTA algorithm; picking the p wave arrival time t by means of the STA / LTA algorithm and solving the seismic source position by a simplex method; calculating the cavern surrounding rock micro-seismic radiation energy, analyzing the space-time distribution characteristic and aggregation degree of the micro-seismic radiation energy, and setting a micro-seismic radiation energy releasing threshold so as to identify the potential instability dangerous zone of the underground water-sealing oil storage cavern; and establishing a cavern tunnel face three-dimensional geo-mechanical model based on the micro-seismic event and the space-time distribution characteristic of the radiation energy, and converting the surrounding rock micro-seismic radiation energy into the mechanic parameters of surrounding rocks damage weakening, and correcting the mechanic parameters of the cavern surrounding rocks in real time. According to the invention, the real-time dynamic monitoring and analysis of the cavern surrounding rock micro-rupture can be realized.

Description

technical field [0001] The invention relates to the technical field of rock mass microseismic monitoring, in particular to a microseismic monitoring method and system for an underground water-sealed oil storage cavern. Background technique [0002] Microseismic monitoring technology, as a space-time dynamic three-dimensional "body" monitoring method, can capture micro-cracks inside the rock mass in time, and analyze the initiation, evolution, expansion, penetration of micro-cracks in real time until the generation of macroscopic slip surfaces, which can be used as an evaluation tool for rock mass. An important monitoring tool for stability. As early as the 1970s, microseismic monitoring technology was applied in the mining field by the former Soviet Union, Canada, the United States and other western countries, and achieved good economic and social benefits. At present, microseismic monitoring has been used as an effective means of ground pressure monitoring in high ground s...

AI Technical Summary

Problems solved by technology

Currently widely used measurement techniques such as multi-point displacement meter and convergent meter take the apparent deformation information of the surrounding rock in the cavern as the monitoring object, which can monitor the surface displacement of the cavern well. Breakage is often helpless, and the "advance amount" of cavern stability monitoring and forecasting is insufficient

Images