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Seismic data low-frequency information compensation method and device

A technology of seismic data and compensation method, which is applied in the field of seismic signal processing in oil exploration, can solve the problems of low-frequency component attenuation, lack of low-frequency components in seismic data, and unpopularity of low-frequency seismic acquisition, and achieve the goal of simple and efficient method and widening of low-frequency spectral width Effect

Active Publication Date: 2016-08-17
PETROCHINA CO LTD
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Problems solved by technology

[0003] At present, due to the limitation of hardware cost and other conditions, low-frequency seismic acquisition using special equipment is not popular
Seismic data collected by conventional sources and receivers, due to the limitations of sources and receivers in the acquisition process, lacks low-frequency components in the collected seismic data, and the surface wave attenuation and other processes in the processing process will also cause further attenuation of low-frequency components. Interpretation and inversion work adversely affect

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  • Seismic data low-frequency information compensation method and device

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Embodiment Construction

[0045] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0046] The specific implementation manners of the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0047] refer to figure 1 , the seismic data low-frequency information compensation method of the embodiment of the present application, including:

[0048] S1...

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Abstract

The invention relates to the field of oil exploration seismic signal processing, in particular to a seismic data low-frequency information compensation method and device. The method includes the steps that a detector transfer function general expression is acquired; a transfer function of a two-order low-frequency compensation filter is acquired according to the detector transfer function general expression; a transfer function of a high-order low-frequency compensation filter is acquired according to the transfer function of the two-order low-frequency compensation filter; seismic data is subjected to low-frequency compensation processing according to the transfer function of the high-order low-frequency compensation filter, and processed seismic data is acquired. The method is simple and efficient, compensation for actual seismic data low-frequency information is achieved, the low-frequency-band spectral width of the seismic data can be effectively increased, and higher-quality data is provided for following explanation and inversion.

Description

technical field [0001] The invention relates to the field of petroleum exploration seismic signal processing, in particular to a compensation method and device for low-frequency information of seismic data. Background technique [0002] Due to its unique anti-shielding, anti-absorption ability and stability, low-frequency signals can be used for imaging deep targets and complex structures, studying internal reflection characteristics of geological structures, improving the accuracy of pre-stack and post-stack inversion impedance, and improving the stability of full-wave inversion It is of great significance to improve the accuracy and precision of seismic wave propagation velocity analysis. Low frequency information plays an important role in seismic data processing, interpretation and inversion. [0003] At present, due to the limitation of hardware cost and other conditions, low-frequency seismic acquisition using special equipment is not popular. Seismic data collected ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/362G01V1/366
Inventor 李海山杨午阳高建虎张巧凤周春雷
Owner PETROCHINA CO LTD