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Underground micro-seismic solving method, device and system based on optical fiber sensor

A micro-seismic and sensor technology, applied in seismology, measuring devices, seismic signal transmission, etc., can solve problems such as high signal-to-noise ratio and slow response speed

Active Publication Date: 2019-01-08
北京昊锐科技有限公司
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Problems solved by technology

In the prior art, there are also technical solutions for earthquake detection that utilize the characteristics of high signal-to-noise ratio, high sensitivity, and high signal strength of optical fiber distributed sensors, which are conducive to judgment. However, since optical fiber sensors use single-point sensors, they can only receive To P wave, S wave, the reaction speed is slow, and there is no concept of three components, so the data processing method is also different from the traditional electronic method

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  • Underground micro-seismic solving method, device and system based on optical fiber sensor

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Embodiment Construction

[0078]In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described The implementations are only some of the implementations of the present application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0079] like figure 1 , a downhole microseismic solution method based on distributed optical fiber sensors, including:

[0080] Step 101, obtaining the spatial position of the distributed fiber optic acoustic wave sensor, including: setting a series of distributed fiber optic acoustic wave sensors at any number of positions in ...

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Abstract

The invention provides an underground micro-seismic solving method, device and system based on a distributed optical fiber sensor, wherein the method comprises the following steps of acquiring the spatial position of a distributed optical fiber acoustic wave sensor; selecting the position of the characteristic distributed optical fiber acoustic wave sensor; calculating the spatial data of the micro-seismic position; adopting a (Kriging ) interpolation method for iteratively calculating the spatial position of a micro-seismic source; and selecting the most accurate micro-seismic source positionaccording to the plurality of spatial positions of the micro-seismic source.

Description

technical field [0001] The invention relates to the application field of distributed optical fiber sensor technology, in particular to an underground microseismic solution method, device and system based on distributed optical fiber sensors. Background technique [0002] Microseismic events are induced during fracturing and can help determine fault growth. The possible causes of microseisms are generally based on downhole fracturing monitoring, seismic exploration operations, and oil and gas field development. The localization of microseismic events can also represent the effects of rock formations and the physical properties of the medium in the fractured region. At the same time, microseismic events can also be used to monitor and track the change or migration of fracturing fluid and the change of reservoir volume. Accurate event localization can be used to revise velocity models and study the focal mechanism of microseismic events. Generally, seismic waves are divided ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/22
CPCG01V1/226G01V1/288
Inventor 蔡大海王锦兵
Owner 北京昊锐科技有限公司
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