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Seismic data deconvolution method

A technology of seismic data and seismic data volume, applied in the field of seismic exploration, can solve the problem of not being able to obtain data while retaining the overall spectral characteristics and local spectral characteristics of seismic data

Pending Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a deconvolution method for seismic data, in order to solve the problem that the current deconvolution method is used to deconvolute seismic data, and the data after deconvolution processing cannot be preserved at the same time. The problem of overall spectral characteristics and local spectral characteristics

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] The present invention provides a deconvolution method based on spectrum analysis and probability statistics to obtain the dominant frequency band (i.e. dominant frequency) of seismic data, highlight the overall spectral characteristics of seismic data and then adjust the local spectral characteristics, so as to solve the problem of existing deconvolution This method cannot preserve the overall and local spectral features of the original seismic data in the deconvolution-processed data, resulting in large changes in the spectral features of the processed seismic data, poor consistency of seismic wavelets, and inconspicuous stratigraphic features. The problem of obvious high-frequency noise and many outliers.

[0033] Method example:

[0034]...

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Abstract

The invention provides a seismic data deconvolution method, and belongs to the technical field of seismic exploration. The method comprises the following steps: acquiring seismic data; performing spectral analysis on each seismic data volume in the seismic data to determine the dominant frequency of each seismic data volume, performing statistical analysis on the dominant frequency of each seismic data volume, and selecting the dominant frequency with the highest distribution probability as the dominant frequency of the seismic data; performing earth surface consistency prediction deconvolution on the seismic data so as to reserve the dominant frequency characteristics of the seismic data; and single-channel small-step prediction deconvolution or single-channel pulse deconvolution is carried out on the seismic data after the earth surface consistency prediction deconvolution processing, so that local spectrum characteristics of the seismic data can be retained, and final seismic data after deconvolution processing can be obtained. According to the seismic data deconvolution method, two deconvolution processing processes are included when deconvolution processing is carried out on the seismic data, the overall spectrum characteristics of the original seismic data can be reserved, the local spectrum characteristics of the original seismic data can also be reserved, and the deconvolution processing effect is good.

Description

technical field [0001] The invention relates to a method for deconvolution of seismic data, which belongs to the technical field of seismic exploration. Background technique [0002] Deconvolution processing is a particularly important link in the process of seismic data processing. It plays a role in connecting the past and the future in the whole process. Deconvolution mainly compresses the basic seismic wavelets in seismic records, suppresses reverberation and short-period multiples, thereby improving longitudinal resolution. At present, the deconvolution processing methods for seismic data are mainly: surface consistent prediction deconvolution and surface consistent pulse deconvolution. The quality of deconvolution processing can directly determine the imaging effect of subsequent processing. Since seismic data often contain multiple seismic data volumes, the spectral characteristics of each seismic data volume together constitute the spectral characteristics of seismi...

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Application Information

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IPC IPC(8): G01V1/30G01V1/36
CPCG01V1/301G01V1/36G01V2210/61
Inventor 刘彦明李敏杰马建波王东奎窦安迪李建军王保喜刘东初
Owner CHINA PETROLEUM & CHEM CORP
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