High-resolution processing method of seismic data based on full-band extension fidelity

A seismic data, high-resolution technology, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve the problems of reduced fidelity, inability to completely eliminate the influence of seismic data noise, and reduced signal-to-noise ratio of data, etc. Achieve good effect, high signal-to-noise ratio, and improve resolution

Active Publication Date: 2022-07-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The above four methods are all based on the principle of removing the seismic wavelet to obtain the reflection coefficient. During the processing, the influence of the noise in the seismic data cannot be completely eliminated. While improving the resolution of the seismic data, the influence of the noise is also amplified, resulting in The data has the problem of reduced signal-to-noise ratio and reduced fidelity

Method used

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  • High-resolution processing method of seismic data based on full-band extension fidelity
  • High-resolution processing method of seismic data based on full-band extension fidelity
  • High-resolution processing method of seismic data based on full-band extension fidelity

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Embodiment 1

[0083] The processing is performed on an actual data. Estimation of seismic wavelets from seismic profiles, Figure 6a The relationship between the seismic data spectrum and the wavelet spectrum is given, and the estimated wavelet is as follows: Figure 6b Shown in dashed line.

[0084] The seismic wavelet is compressed by the frequency-dependent wavelet continuation method, and then a compression operator is constructed by using the spectrum before and after the wavelet compression, and acts on the estimated wavelet, and the wavelet constructed by the compression operator is used. The spectrum of the wavelet after the compression operator is applied is different from that of the theoretical compression wavelet, which is caused by the regularization factor introduced to ensure the stability of the wavelet compression operator.

[0085] By applying the constructed wavelet compression operator to the seismic profile, a seismic profile with improved resolution can be obtained, ...

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Abstract

The present invention proposes a high-resolution processing method for seismic data based on full-band extension fidelity, including four steps: estimating seismic wavelets w(t) from seismic data; widening the data spectrum W by using a spectrum broadening factor a(ω) (ω) to calculate the conduction filter operator H(ω) based on the two spectra obtained in the previous step; finally, use the conduction filter operator H(ω) to process the entire seismic data. The invention processes and compresses seismic wavelets to achieve the purpose of full frequency band extension processing, so as to effectively improve the resolution of seismic data, and at the same time, the processed data has high fidelity.

Description

technical field [0001] The invention belongs to the technical field of seismic data data processing, and in particular relates to a seismic data high-resolution processing method based on full frequency band extension fidelity. Background technique [0002] In the field of oil and gas exploration, seismic data high-resolution processing methods and technologies have always been an important research direction in this field. Many scholars have carried out research on this problem and formed a series of seismic data extension methods. These include seismic data deconvolution, spectral whitening methods and sparse spectral inversion, as well as inverse Q filtering methods for formation attenuation. [0003] The basic theoretical model for the formation of seismic data is the convolution model. It is generally believed that seismic records are formed by the mutual convolution of seismic wavelets and the reflection coefficients of the formation interface. Mathematically, it can ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/36
CPCG01V1/282G01V1/36G01V1/364G01V2210/324
Inventor 钟庆良陈双全张颖燕莫莉曾晓平
Owner CHINA PETROLEUM & CHEM CORP
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