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Full-spectrum-band amplitude-preserving seismic data processing method and device

A seismic data and data processing technology, applied in the field of oil and natural gas seismic exploration, can solve the problems of inability to effectively obtain suppressed frequency bands, low signal-to-noise ratio, etc., achieve rich signals, high resolution and fidelity, improve resolution and Fidelity effect

Active Publication Date: 2019-01-22
PETROCHINA CO LTD
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Problems solved by technology

[0005] The embodiment of the present application provides a full-frequency amplitude-preserving seismic data processing method and device to solve the technical problem that existing processing methods cannot effectively obtain effective seismic signals with low signal-to-noise ratio in the suppressed frequency band

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Embodiment Construction

[0056] 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.

[0057] Considering the existing processing technology, the implementation is influenced by the processing concept of pursuing high signal-to-noise ratio in each seismic processing link—following the previous processing experience and relying on visual senses to control the frequency extension and denoising of seismic data. Specifically, f...

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Abstract

The application provides a full-spectrum-band amplitude-preserving seismic data processing method and device. The method includes steps: obtaining seismic data; performing wavelet standardized shapingon the seismic data, and performing full-spectrum-band frequency-broadening processing to release all seismic signals in a spectrum suppression band and obtain a first category of seismic data; performing whitening processing satisfying random noise hypothesis on interference signals in the first category of seismic data to obtain a second category of seismic data; performing data processing on the second category of seismic data to obtain a third category of seismic data, wherein the data processing maintains a full-spectrum-band characteristic and a noise whitening characteristic of the seismic data; performing pre-stack migration imaging processing on the third category of seismic data to obtain a fourth category of seismic data; and performing optimal resolution wavelet shaping on thefourth category of seismic data to obtain target seismic data. The seismic acquisition characteristics of wide frequency band, wide orientation and high density are considered, available effective signals in the seismic data are fully utilized, and effects of improving the wavelet consistence of the seismic data and improving the resolution and the fidelity of the seismic data are achieved.

Description

technical field [0001] The present application relates to the technical field of petroleum and natural gas seismic exploration, in particular to a full-frequency amplitude-preserving seismic data processing method and device. Background technique [0002] In the field of oil and natural gas seismic exploration, the original seismic data collected manually are usually processed to obtain seismic data with improved resolution and amplitude preservation, which can meet the needs of geological interpretation, and are used to serve subsequent specific seismic exploration work ( For example, searching for lithologic oil and gas reservoirs based on the processed seismic data that meets the requirements, etc.). [0003] At present, most of the existing seismic data processing work is based on the technical personnel's visual senses or past experience to perform frequency extension and denoising processing on seismic data. When implemented according to the above method, only the sei...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/362
Inventor 徐凌秦楠范新燕胡英王春明
Owner PETROCHINA CO LTD
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