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Full waveform inversion method and device

A full-waveform inversion and wave field technology, applied in the field of geological exploration, can solve the problems of low signal-to-noise ratio, unstable source, affecting the energy balance of the receiving channel, etc., achieve stable inversion, eliminate inversion artifacts, and improve modeling The effect of precision

Active Publication Date: 2019-08-27
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The full waveform inversion technology of land data has been greatly limited, such as low signal-to-noise ratio, unstable source, near-surface influence and other factors
Moreover, compared with oceanographic hydrophones, the coupling between land geophones and the ground is different, which often affects the energy balance between receiving channels, which has a very large impact on full waveform inversion

Method used

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  • Full waveform inversion method and device

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Embodiment 1

[0017] figure 1 Shows a flow chart of a full waveform inversion method according to an embodiment of the present invention, the method may include:

[0018] Step 101, performing energy normalization processing on the actual records to achieve inter-channel equalization;

[0019] Step 102, performing energy normalization processing on the simulated record, so as to realize the matching between the simulated wave field and the actual wave field;

[0020] Step 103, calculating the data residuals of the processed actual records and simulated records; and

[0021] Step 104, based on full waveform inversion, iterative operation is performed on the data residual to complete the speed update.

[0022] In this embodiment, by performing energy normalization processing on actual records and simulated records, stable and high-precision full waveform inversion of land data with unbalanced energy is realized.

[0023] The full waveform inversion method according to the present invention ...

Embodiment 2

[0040] According to another embodiment of the present invention, a full waveform inversion device is provided. The device may include: an actual record normalization module, which is used to perform energy normalization processing on the actual records to achieve inter-track balance; a simulated record normalization module, which is used to perform energy normalization processing on the simulated records to achieve Realize the matching of the simulated wave field and the actual wave field; the calculation residual module is used to calculate the data residual of the processed actual record and the simulated record; and the iteration module is used to iteratively operate the data residual based on the full waveform inversion Update at speed.

[0041] In one example, performing energy normalization processing on the actual records may include: performing energy statistics on the seismic receiving trace section to find the energy maximum value of the receiver points in the receiv...

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Abstract

The invention provides a full waveform inversion method and device. The method comprises the steps of: performing energy normalization processing on actual records to achieve trace equalization; performing energy normalization processing on simulation records to achieve matching of a simulation wave field and an actual wave field; calculating data residues of the processed actual records and simulation records and performing iteration operation on the data residues based on full waveform inversion to complete speed update. The full waveform inversion method and device can perform energy normalization processing or actual records and simulation records and achieve stable and high-precision full waveform inversion of land data with energy disequilibrium.

Description

technical field [0001] The invention relates to the technical field of geological exploration, and more particularly, to a full waveform inversion method and a full waveform inversion device. Background technique [0002] In recent years, the full waveform inversion theory has been widely concerned in the field of geological exploration. Full waveform inversion can improve conventional seismic resolution and obtain optimized data, improving the ability to evaluate geological resources. [0003] The full waveform inversion technology of land data has been subject to great limitations, such as low signal-to-noise ratio, source instability, near-surface influence and other factors. Moreover, compared with oceanographic hydrophones, the coupling between land geophones and the ground is different, which often affects the energy balance between receiving channels, which has a great impact on full waveform inversion. Therefore, it is necessary to develop a full waveform inversion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 胡光辉王杰
Owner CHINA PETROLEUM & CHEM CORP
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