Microseism event scanning positioning method and device

A technology of event scanning and positioning method, applied in the field of seismic exploration, which can solve problems such as low signal-to-noise ratio, positive and negative phase offset, and difficulty in first arrival picking, and achieve the effect of simple correction method, small amount of calculation, and strong adaptability

Active Publication Date: 2014-11-05
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0003] There are many microseismic monitoring methods in the prior art. When there is no well to choose for in-hole monitoring, the surface array monitoring method is more commonly used. When the data obtained by this method are used for microseismic positioning, the signal-to-noise ratio is low and the first arrival picks up Difficult, most of them

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  • Microseism event scanning positioning method and device
  • Microseism event scanning positioning method and device
  • Microseism event scanning positioning method and device

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[0069] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0070] Such as figure 1 As shown, the present invention provides a microseismic event scanning and positioning method, and the microseismic event scanning and positioning method includes:

[0071] Step 101: Acquire single-component or three-component microseismic data through multiple arrays on the ground;

[0072] Step 102: Obtain a calibration shot, and generate a static correction amount for each detection point according to the calibrat...

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Abstract

The invention discloses a microseism event scanning positioning method and device. The microseism event scanning positioning method includes the steps of collecting simple-component or three-component microseism data; obtaining a check shot, and generating static correction values of geophone points according to the check shot; carrying out time difference correction on the microseism data with the first-break time of the check shot, and respectively carrying out stacking to generate stacked tracks; judging whether the number of arrays, with peak amplitudes larger than a preset amplitude threshold value, in arrays with the preset number reaches a set number or not; if the number of the arrays, with the peak amplitudes larger than the preset amplitude threshold value, in the arrays with the preset number reaches the set number, defining the time when the number of the arrays reaches the set number to be arrival time of one effective event; generating first-break polarity pij by picking up take-off time or extreme value time of the arrays; carrying out static correction on the effective events, multiplying pre-stack amplitudes of the effective events obtained after static correction by the corresponding first-break polarity pij according to event numbers and array numbers corresponding to the effective events to generate corrected data; carrying out seismic focus positioning on the corrected data with a multi-scale mesh energy scanning method.

Description

technical field [0001] The present invention relates to seismic prospecting technology, in particular to seismic prospecting data processing technology, specifically, to a micro-seismic event scanning positioning method and device. Background technique [0002] In unconventional oil and gas hydraulic fracturing projects or geothermal utilization projects, the acoustic emission events generated during rock fractures can be obtained through microseismic monitoring, and the location of these events can reveal information such as the spatial distribution of underground rock fractures, which can be used for hydraulic fracturing, etc. It provides the most direct help for engineering parameter optimization and effect evaluation. [0003] There are many microseismic monitoring methods in the prior art. When there is no well to choose for in-hole monitoring, the surface array monitoring method is more commonly used. When the data obtained by this method are used for microseismic posi...

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Application Information

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IPC IPC(8): G01V1/36G01V1/30G01V1/28
Inventor 李彦鹏徐刚储仿东容娇君
Owner BC P INC CHINA NAT PETROLEUM CORP
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