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Static correction method for surface array microseismic data searched along well trajectory

A technology of seismic data and static correction, applied in the direction of seismic signal processing, etc., can solve problems such as loss of function, and achieve the effect of improving positioning accuracy

Active Publication Date: 2017-10-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional microseismic data static correction method needs to know the coordinates of the perforation point position. If the perforation point position coordinates are unknown, the conventional microseismic data static correction method loses its effect

Method used

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  • Static correction method for surface array microseismic data searched along well trajectory
  • Static correction method for surface array microseismic data searched along well trajectory
  • Static correction method for surface array microseismic data searched along well trajectory

Examples

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Effect test

Embodiment 1

[0031] Example 1. A ground array microseismic data static correction method searching along well trajectory, the static correction method comprising:

[0032] (1) In the ground array microseismic data, when the coordinates of the perforation point position are unknown, according to the principle of the strongest stacking energy, the optimal search is carried out along the well trajectory to determine the coordinates of the perforation point position;

[0033] (2) Perform dynamic correction processing on the microseismic data, and use the cross-correlation superposition method to calculate the static correction standard trace of the microseismic data;

[0034] (3) Based on the static correction standard trace of microseismic data, eliminate the final static correction time difference caused by near-surface factors in microseismic data;

[0035] (4) Bring the final static correction time difference into the microseismic data of other periods of the well, eliminate the problem o...

Embodiment 2

[0037] Example 2. A static correction method for ground array microseismic data searching along well trajectory, comprising the following steps.

[0038] (1) Import the ground array microseismic monitoring and observation system, the collected ground array microseismic data and the well trajectory position coordinates.

[0039] (2) When the position coordinates of the perforation points in the ground array microseismic data are unknown, based on the principle of maximizing the stacking energy of all geophone trace data, optimally search for each well trajectory position point along the well trajectory to reach the ground array microseismic monitoring According to the arrival time of the geophone, the microseismic data is dynamically corrected according to the corresponding arrival time, and all trace data after the dynamic correction are superimposed to obtain the microseismic data stacking energy value of each well track position point , when the superposition energy value r...

Embodiment 3

[0046] Example 3. Such as figure 1 as shown, figure 1 It is a schematic flowchart of a static correction method for surface array microseismic data searched along well trajectory according to an embodiment of the present invention.

[0047] In step 101, the ground array microseismic observation system, the collected ground array microseismic data and well trajectory coordinates are simultaneously imported.

[0048] In step 102, when the position coordinates of the perforation points in the ground array microseismic data are unknown, based on the principle of maximizing the superposition energy of all geophone trace data, optimally search for each well trajectory position point along the well trajectory to reach the ground array microseismic data. Monitor the arrival time of the geophone, perform dynamic correction processing on the data according to the corresponding arrival time, and superimpose all trace data after the dynamic correction processing, and calculate the micro...

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Abstract

The invention discloses a ground array microseismic data static correction method for searching along the well trajectory, including: in the ground array microseismic data, under the condition that the position coordinates of the perforation points are unknown, according to the principle of the strongest superposition energy, the most Optimal search to determine the coordinates of the perforation point position; perform dynamic correction processing on the microseismic data, and use the cross-correlation superposition method to calculate the static correction standard trace of the microseismic data; based on the static correction standard trace of the microseismic data, Calculate the final static correction time difference caused by near-surface factors in the microseismic data; bring the final static correction time difference into the microseismic data of other periods of the well, eliminate the static correction problem of the microseismic data, and improve the positioning of the microseismic source point precision. The invention performs optimal search along the well trajectory, and can eliminate the static correction time difference caused by near-surface factors according to the static correction standard track, so that the accuracy of microseismic source point positioning in fracturing construction is effectively improved.

Description

technical field [0001] The invention relates to a static correction processing technology for microseismic data in oil and gas geophysical exploration, in particular to a ground array microseismic data static correction method for searching along well trajectory. Background technique [0002] The physical properties of unconventional oil and gas effective reservoirs are characterized by low porosity and low permeability. Through the fracturing of effective reservoirs, the fracture system between the wellbore and formation fractures can be improved, seepage channels can be increased, and the effective permeability can be increased. and productivity, fracturing is an effective method for the extraction of unconventional oil and gas resources. As far as the current technology is concerned, microseismic monitoring is the most effective, economical and timely fracturing monitoring technology. The ground array microseismic monitoring geophones are arranged in a relatively regular...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
Inventor 刁瑞尚新民单联瑜王延光王兴谋胡晓婷崔庆辉胡贤根
Owner CHINA PETROLEUM & CHEM CORP