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Direct P-wave amplitude extraction method and device

An extraction method and extraction device technology, applied in the field of direct P wave amplitude extraction, can solve the problems of low accuracy and achieve good quality results

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for extracting the amplitude of the direct P wave, which is used to solve the technical problem of low accuracy of the existing method when extracting the amplitude of the first arrival P wave

Method used

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  • Direct P-wave amplitude extraction method and device
  • Direct P-wave amplitude extraction method and device

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Embodiment 1

[0045] figure 1 A schematic flow chart of the direct P wave amplitude extraction method provided in Embodiment 1 of the present invention; figure 1 As shown, the present embodiment provides a direct P wave amplitude extraction method, comprising the following steps:

[0046] Step 101. Obtain trace records of different seismic traces, where the trace records are direct P-wave signals.

[0047] Specifically, the microseismic event records are obtained, and the microseismic event records are screened, and the trace records with a high signal-to-noise ratio of the direct P wave signal are selected, that is, the pre-acquired microseismic event records are screened to select the signal-to-noise ratio Trace records greater than a preset threshold. The preset threshold can be selected according to actual conditions, and is not limited here.

[0048] Of course, when screening the pre-acquired microseismic event records, the trace records whose signal-to-noise ratio is greater than t...

Embodiment 2

[0071] Figure 5 Schematic diagram of the structure of the direct P wave amplitude extraction device provided in Embodiment 2 of the present invention; Figure 5 As shown, this embodiment provides a direct P-wave amplitude extraction device, including a track record acquisition module 201, a first auxiliary record acquisition module 202, a reference track record acquisition module 203, a second auxiliary record acquisition module 204 and an amplitude extraction module 205 .

[0072] Wherein, the trace record obtaining module 201 is used to obtain trace records of different seismic traces, and the trace records are direct P wave signals.

[0073] Specifically, the microseismic event records are obtained, and the microseismic event records are screened, and the trace records with a high signal-to-noise ratio of the direct P wave signal are selected, that is, the pre-acquired microseismic event records are screened to select the signal-to-noise ratio Trace records greater than ...

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Abstract

The invention provides a direct P-wave amplitude extraction method and device, and the method comprises the steps: obtaining the trace records of different seismic traces, and the trace records beingdirect P-wave signals; performing cross-correlation operation on the adjacent trace records to obtain a first auxiliary record; superposing the first auxiliary records to obtain a reference trace record; performing cross-correlation operation on the reference trace record and each trace record to obtain a second auxiliary record corresponding to each trace record; and extracting the amplitude according to the second auxiliary record. Therefore, the obtained reference trace record is good in quality, then cross-correlation operation is carried out on each trace record and the reference trace record to obtain a second auxiliary record, and the amplitude relative size can be picked up from the second auxiliary record more accurately and efficiently.

Description

technical field [0001] The invention relates to the technical field of ground microseismic monitoring, in particular to a method and device for extracting direct P wave amplitude. Background technique [0002] Hydraulic fracturing microseismic monitoring technology is an important means of monitoring hydraulic fracturing fractures during the development of unconventional reservoirs such as shale gas and tight gas. Obtaining the spatial distribution of hydraulic fracturing fractures through microseismic monitoring can provide important parameters for well pattern deployment and fracturing scheme optimization. [0003] Surface microseismic monitoring is an important method of microseismic monitoring. Generally, first-arrival P-wave information is used to invert the source parameters (including location and source mechanism). When inverting the focal mechanism, a method with higher accuracy is to use the amplitude-constrained inversion method. Compared with the focal mechanism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/288
Inventor 李宏杨心超朱海波
Owner CHINA PETROLEUM & CHEM CORP
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