Microseismic event detection and positioning method and system

Abstract

The invention relates to a microseism event detection and positioning method and system, and the method comprises the steps: carrying out the SET imaging of collected microseism signals of a plurality of monitoring stations in a fracturing process, dividing an image according to whether a microseism event occurs, and building a training data set and a test data set; inputting a training data set sample into the established residual error network model for training, and inputting a test data set sample into the trained residual error network model for checking the performance of the residual error network model; storing parameters of the trained residual network model; and collecting micro-seismic signals of a plurality of monitoring stations in the real-time fracturing process, establishing a to-be-tested data set, inputting the data of the to-be-tested data set into the trained residual network model for detection to obtain an imaging graph classification result, and determining whether a micro-seismic event exists and the position of a seismic source exists or not according to the imaging graph classification result. According to the invention, real-time on-line detection of the micro-seismic event and the seismic source position can be realized, the identification speed is fast, and the identification precision is high.

Description

Technical field [0001] The present invention belongs to the field of oil and gas exploration, involving monitoring data processing techniques during oil and gas well fracturing, in particular, to a microscopic event detection and positioning method and system. Background technique [0002] Microscopic hydraulic fracturing monitoring technology is an important technique in recent years of application of oil and gas resource exploration and development. Hydraulic fracturing is to inject high viscosity of high-viscosity through the wellbore to the target reservoir, so that the formation rock is broken and the microstatic signal having a low energy level is low. The microscopic hydraulic fracturing monitoring technology is to detect and process this microscopic signal to determine the source point of each microscopic event, which in turn describes the formation and distribution of fracturing split slit through a series of distributions of the source point. [0003] Seismic emission c...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned problems of slow recognition speed and low recognition precision existing in the prior art, and provides a method and system for detecting and locating microseismic events, which can realize real-time online detection and locating of microseismic events, with fast recognition speed and high recognition accuracy. high

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