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Method for positioning seismic source in microseism monitoring system

A seismic source positioning and monitoring system technology, applied in the field of geophysical exploration in wells, can solve the problems of large amount of calculation and difficult monitoring results to meet the needs, and achieve the effect of small amount of calculation

Active Publication Date: 2017-01-11
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Application Information

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Problems solved by technology

The positioning speed of this method depends on the monitoring accuracy. The higher the monitoring accuracy, the denser the grid division required, and the calculation amount will be very large. When the monitoring accuracy is low, the calculation speed can be improved, but the monitoring results often difficult to meet needs

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  • Method for positioning seismic source in microseism monitoring system
  • Method for positioning seismic source in microseism monitoring system
  • Method for positioning seismic source in microseism monitoring system

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Embodiment Construction

[0036] In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the schematic embodiments and descriptions of the embodiments of the present application are used to explain the embodiments of the present application, but are not intended to limit the embodiments of the present application.

[0037] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 Shown is a schematic flowchart of a method for locating an earthquake source in a microseismic monitoring system. Such as figure 1 As shown, a method for source location in a microseismic monitoring system may include:

[0039] S101. Obtain a monitoring area and each o...

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Abstract

The embodiments of the invention provide a method for positioning a seismic source in a microseism monitoring system. The method comprises the steps of: acquiring a monitored area and observation points in the monitored area; according to the seismic source positioning precision, dividing the monitored area into N layers of grids, wherein the side length of a grid unit of the i layer of grids is D / 2i 1, i=1, . . .N, and D is the initial side length of the grid unit; searching all nodes in the i layer of grids, and acquiring the nodes satisfying a preset condition; from i=2, determining and searching the nodes meeting a first preset requirement in the i layer of grids, and acquiring the nodes satisfying the preset condition, till completing search of the N layer of grids, wherein the node acquired in the N layer of grids and satisfying the preset condition is the seismic source point. The method realizes high-precision microseism source positioning and is small in calculation quantity.

Description

technical field [0001] The present application relates to the technical field of borehole geophysical prospecting, in particular to a method for locating seismic sources in a microseismic monitoring system. Background technique [0002] Microseismic monitoring technology is a geophysical technology that monitors the impact, effect and underground state of production activities by observing and analyzing small seismic events generated in production activities. It is used in hydraulic fracturing fracture monitoring, oilfield safety monitoring, oilfield dynamic monitoring and Fields such as mine safety play an important role. The key to microseismic monitoring technology is to accurately determine the location of the earthquake source. [0003] In the current microseismic source location method based on the forward modeling model, the location of the microseismic source is determined by dividing the monitoring area into uniform grids and searching nodes one by one. The size of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28G01V2210/6222G01V2210/123G01V1/288G01V1/005G01V1/30
Inventor 金其虎刘聪伟李彦鹏李飞徐刚储仿东
Owner BC P INC CHINA NAT PETROLEUM CORP
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