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Method and system for detecting microseism event

An event detection and microseismic technology, applied in seismology, geophysical measurement, seismic signal processing, etc., can solve problems such as poor accuracy and reliability

Inactive Publication Date: 2018-09-14
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, manual analysis of microseismic records is often used in production to judge microseismic events. However, manual methods cannot accurately avoid noise and interference, and the accuracy and reliability are poor.

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  • Method and system for detecting microseism event
  • Method and system for detecting microseism event

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0071] The object of the present invention is to provide a microseismic event detection method and system, which can effectively avoid the influence of noise on the detection accuracy and improve the detection accuracy.

[0072] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodim...

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Abstract

The invention discloses a method and system for detecting a microseism event. The method includes the steps that the optimal time-window length L obtained after a microseism detection sequence of a marked microseism wave is trained with the first-order liner regression function and the kriging interpolation method is obtained; a to-be-detected microseism data sequence in time order is obtained; afirst time window and a second time window following the first time window are established, wherein the lengths of the two time windows are both L; data filling is conducted on the left side and the right side of the microseism data sequence; a first piece of data, aligned with the center of the first time window, of the microseism data sequence is slid by two time windows till the center of the first time window is aligned with a final piece of data of the microseism data sequence; every time sliding of the step size of one piece of data is conducted, the data in the two time windows is subjected to chi-square testing to determine whether a microseism wave is generated at each piece of data in the microseism data sequence. By means of the method and system, the influences of noise on detection precision can be effectively avoided, and detection accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of microseismic events, in particular to a method and system for detecting microseismic events. Background technique [0002] Hydraulic fracturing microseismic monitoring technology is an important new technology developed in the fields of low permeability reservoir fracturing, reservoir driving and water flooding front in recent years, and it is also an important supporting technology for shale gas development. This technology arranges a multi-level three-component geophone arrangement in adjacent wells to monitor the microseismic events generated in the hydraulic fracturing process of the target interval of the fracturing well, and inverts the microseismic events to obtain parameters such as the source position, so as to describe the hydraulic fracturing The geometry and spatial distribution of fracture growth during the process provide real-time information on the length, height, width and orientation of ...

Claims

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/288
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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