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Seismic data frequency band expansion processing method based on compressed sensing

A technology of seismic data and compressed sensing, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve the problem of low universal applicability and achieve the effect of ensuring effective application

Inactive Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

For example, inverse Q filter compensation based on micro-logging, frequency band widening based on multi-differential fusion in the frequency domain, etc., but these methods are highly pertinent to actual data and have low universal applicability, making it difficult to popularize and apply them as basic methods

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  • Seismic data frequency band expansion processing method based on compressed sensing
  • Seismic data frequency band expansion processing method based on compressed sensing
  • Seismic data frequency band expansion processing method based on compressed sensing

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Embodiment

[0083] Such as figure 1 The upper and middle figures show the data model set by the compressive sensing method in the present invention when the signals of the upper and lower two coaxial axes are both positive 1. The figure below is the result of calculation using the method given in the present invention. You can see the calculation The result is very close to the original data, and the error range is very small. For this kind of stratum similar to two layers whose reflection coefficients are both positive 1, that is, strata with similar reflection coefficients, the method in this paper can be used to clearly distinguish them. For randomly generated reflection coefficients, data simulations are also carried out in this paper, and the synthetic record is formed by convolution operation with the 30Hz zero-phase Reich wavelet. By observing the comparison between the original data and the compressed sensing calculation data, it can be seen that if the analysis is performed from ...

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Abstract

The invention provides a seismic data frequency band expansion processing method based on compressed sensing. The method comprises the steps of: S1), representing a seismic signal based on a reflection coefficient of an underground stratum; S2) converting the seismic signal to obtain a frequency spectrum corresponding to the seismic signal; S3) carrying out discrete operation on the spectrum equation of the frequency spectrum to establish an equation of a reflection coefficient effective selection spectrum; and S4) carrying out optimization solution on the reflection coefficient so as to obtain a broadband sparse pulse reflection coefficient sequence.

Description

technical field [0001] The invention belongs to the field of seismic data processing, and in particular relates to a seismic frequency band extension processing method based on compressed sensing. Background technique [0002] The current status of seismic exploration is that unexplored blocks are decreasing year by year, and repeated exploration processing of old blocks is gradually increasing. However, the frequency band of actual seismic data is narrow and the resolution is low, which is difficult to meet the needs of fine seismic processing and interpretation. There are many methods to broaden the frequency band of seismic data, including deconvolution, spectral whitening, inverse Q filtering, high frequency compensation and spectral shaping. These methods can solve the resolution problem of seismic data in different periods to a certain extent, but because each of them needs to meet certain assumptions to be established, they have great limitations, and the identificat...

Claims

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Application Information

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IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/307G01V1/28
Inventor 张靖周旸张志立邹少峰刘小民马江林高艳霞刘晗
Owner CHINA PETROLEUM & CHEM CORP
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