Deep shale oil ground microseism weak signal extraction and three-dimensional positioning method

By calculating the characteristic difference degree and frequency domain characteristic evaluation in deep shale oil exploration, the target signal set was screened and a deep neural network model was adopted to solve the problem of weak seismic signals being difficult to extract and locate in traditional methods, and to achieve high-precision three-dimensional location of hydraulic fracturing fractures.

CN122085358APending Publication Date: 2026-05-26DAQING YILAI TESTING TECH SERVICE CO LTD
10 Cites 0 Cited by

Patent Information

Application Number
CN202610545701.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-23
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the exploration and development of deep shale oil, traditional microseismic monitoring methods are difficult to effectively extract weak seismic signals, resulting in large deviations in the location of hydraulic fracturing fractures and a high misjudgment rate, which affects development efficiency.

Method used

Signals are classified by calculating the characteristic differences between detector channels, and a target signal set is selected. Then, three-dimensional localization is performed by combining frequency domain feature evaluation and deep neural network model to eliminate spurious signal interference and ensure the integrity and accuracy of the signal.

Benefits of technology

It improves the accuracy of three-dimensional positioning of fracturing fractures in deep shale oil, reduces the interference of pseudo signals on positioning, ensures the signal-to-noise ratio and the purity of positioning input, and achieves high-precision spatial coordinate mapping.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of oil and gas field development, in particular to a deep shale oil ground micro-seismic weak signal extraction and three-dimensional positioning method, which comprises the following steps: when a deep shale oil reservoir of a target exploration area is subjected to fracturing operation, collecting seismic weak signals induced by fracturing cracks through each detector channel; calculating a characteristic difference degree representing a waveform form deviation degree between the signals, and classifying the seismic weak signals of all detector channels by taking the characteristic difference degree as a measurement distance so as to screen out a target signal set; determining the disturbed evaluation value of each earthquake weak signal in the target signal set, screening out a reference signal, extracting a time window covering the characteristics from stratum fracture to attenuation integrity from the reference signal, intercepting an effective signal from the earthquake weak signals in the target signal set, and carrying out three-dimensional positioning on the fracturing crack. According to the method, the three-dimensional positioning accuracy of the fracturing crack of the deep shale oil reservoir is improved.
Need to check novelty before this filing date? Find Prior Art