Method for improving seismic data resolution based on seismographic record varitron wave model

A technology for seismic recording and seismic data, applied in seismic signal processing and other directions, can solve problems such as poor results

Active Publication Date: 2011-09-14
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

However, because the deconvolution operators at different times are simultaneously solved according to the single Q value model, the Gabor deconvolution method is not effective for the change of formation Q value with depth.

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  • Method for improving seismic data resolution based on seismographic record varitron wave model
  • Method for improving seismic data resolution based on seismographic record varitron wave model
  • Method for improving seismic data resolution based on seismographic record varitron wave model

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Embodiment Construction

[0067] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0068] The method for improving the resolution of non-stationary seismic data in the self-adaptive time-frequency domain based on the seismic record variable wavelet model proposed by the present invention comprises the following steps:

[0069] 1) Construct a molecular-Gabor window to adaptively divide the non-stationary seismic record into several stable segments, each segment has an approximately constant equivalent wavelet, and the equivalent wavelet is easy to extract from this segment come out;

[0070] 2) Use the molecular window constructed in the first step to generate the molecular-Gabor frame, and transform the non-stationary seismic records into the molecular-Gabor domain;

[0071] 3) In the molecule-Gabor domain, perform frequency extension and energy compensation processing on the molecule-Gabor coefficients corresponding to the seismic...

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Abstract

The invention relates to a based method for improving seismic data resolution based on a seismographic record varitron wave, which is characterized by comprising the steps of: 1, constructing a molecule-Gabor window, adaptively dividing an instable seismographic record into a plurality of stable segments, wherein each segment has an approximately unchangeable equivalent wavelet which is easy to extract from the segment; 2, converting the instable seismographic record into a molecule-Gabor domain by using a molecule-Gabor frame generated by the molecule window obtained by the construction in the step 1; 3, carrying out frequency extension and energy compensation processing on molecule-Gabor coefficients corresponding to the seismographic record segments in each molecule-Gabor window; and 4, inversely transforming the processed molecule-Gabor coefficients into a time domain to obtain the seismographic record after the resolution ratio is increased. In the method, on the basis of the modern quasidifferential operator principle, an adaptive time-frequency analyzing method is used as a tool, and the processed seismic data has high resolution rate and relatively keeps amplitude characteristics.

Description

technical field [0001] The invention belongs to the field of seismic data analysis and processing in oil and gas exploration, and relates to a technology for improving the resolution of seismic data based on adaptive time-frequency transformation in this field, in particular to a seismic record-based variable wavelet A method to improve the resolution of non-stationary seismic data by the model. Background technique [0002] The commonly used methods for improving the vertical resolution of seismic data (such as spectral whitening method and various deconvolution methods) are based on the traditional convolution model. This model is based on several basic assumptions, one of which is to assume that the wavelet is stationary, that is, it is assumed that the wavelet does not change with time during its underground propagation. However, the actual neutron waves are often non-stationary, which makes it difficult to achieve good results in many cases by using this model as a the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 朱伟林赵伟高静怀翁斌姜秀娣安琪宋亮李丽霞印海燕汪玲玲张兵
Owner CHINA NAT OFFSHORE OIL CORP
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