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Intelligent time-varying blind deconvolution broadband processing method and device

A processing method and deconvolution technology, applied in the field of intelligent time-varying blind deconvolution broadband processing methods and devices, can solve problems such as relying on manual discrimination, and achieve the effect of reducing workload and errors

Active Publication Date: 2018-10-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

At present, there are also some methods of scanning Q strategy to obtain the best Q value, but the effect of Q value mainly depends on manual judgment, which brings a lot of workload and error to the inversion work

Method used

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  • Intelligent time-varying blind deconvolution broadband processing method and device
  • Intelligent time-varying blind deconvolution broadband processing method and device
  • Intelligent time-varying blind deconvolution broadband processing method and device

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Experimental program
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Effect test

Embodiment

[0095] The effect of processing seismic data by using the intelligent time-varying blind deconvolution broadband processing method proposed by the present invention is verified.

[0096] Obtain a seismic wavelet through a reflection coefficient experiment, and then use the method of the present invention to invert the seismic wavelet to obtain the optimal time-varying wavelet, such as image 3 shown. image 3 Represents the real time-varying wavelet under noise-free conditions and the time-varying wavelet obtained by inversion with 20 different random initial models. The dashed line represents the wavelet at the shallow 100ms, the solid line with the solid line represents the wavelet at the middle 500ms, and the solid line with an asterisk represents the wavelet at the deep 900ms. It can be seen that the real and inverted wavelets are well matched in the shallow, medium and deep layers, and such good results can be obtained under 20 different random initial model conditions, ...

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Abstract

The invention provides an intelligent time-varying blind deconvolution broadband processing method and device. The method comprises: extracting an initial seismic wavelet from an attenuated seismic data; generating a Q value group including a plurality of stratum quality factors Q values randomly; according to the initial seismic wavelet and the Q value group, establishing a time-varying wavelet matrix group; acquiring a plurality of reflection coefficients according to the attenuated seismic data and the time-varying wavelet matrix group; establishing a fitness function; on the basis of the fitness function and the multiple reflection coefficients, acquiring a plurality of fitness values corresponding to the stratum quality factors Q values one by one; according to the multiple fitness values, determining an optimal stratum quality factors Q value. Because the optimal Q value is obtained by intelligent searching instead of manual determination, the work load and error occurrence are reduced, so that an optimal time-varying wavelet is estimated from unsteady data; and an optimal time-varying blind deconvolution result is obtained.

Description

technical field [0001] The invention relates to the technical field of high-resolution processing, inversion and interpretation of geophysical exploration, in particular to an intelligent time-varying blind deconvolution broadband processing method and device. Background technique [0002] In the field of geophysical exploration, the acquired seismic waveform data can be regarded as the superposition of wavelets excited by the ground when they are received after underground propagation and interface reflection, which is the result of convolution of seismic wavelets and reflection coefficients. Theoretically, it requires the input seismic data to be steady state (that is, the attenuation and dispersion effects of formation quality factor Q are not considered). If the Fourier spectrum (amplitude spectrum and phase spectrum) of the seismic wave does not change during the propagation process, the seismic wave is said to be steady state. On the contrary, the frequency spectrum o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 袁三一韦婉婉邓力程亮余子昭王尚旭
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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