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Global optimization time-varying sparse deconvolution method and device

A global optimization and deconvolution technology, applied in the field of geophysical exploration and inversion, can solve the problem of low accuracy of results

Active Publication Date: 2017-10-03
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] The present invention provides a globally optimized time-varying sparse deconvolution method and device to at least solve the problem of low accuracy of results obtained by using conventional deconvolution methods in the current geological exploration process

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  • Global optimization time-varying sparse deconvolution method and device

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[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The embodiment of the present invention provides a globally optimized time-varying sparse deconvolution method, figure 1 is a flow chart of the globally optimized time-varying sparse deconvolution method of the embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0055] Step S101, constructing a time-varying partial spectrum deconvolution model of the non-stationary seismic data in the f...

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Abstract

The invention discloses a globally optimized time-varying sparse deconvolution method and apparatus. The method comprises the following steps: a frequency domain time-varying part spectrum deconvolution model of unstable state seismic data is constructed; a reflection coefficient pulse number is determined through utilization of the limited update rate principle and an unstable state seismic data effective bandwidth; through a very fast simulated annealing algorithm and the frequency domain time-varying part spectrum deconvolution model, the time position of reflection coefficient pulses of the frequency domain time-varying part spectrum deconvolution model is searched; with regard to the searched time positions, iteration is carried out through utilization of a least square method, and reflection coefficient pulse amplitudes of the time positions are determined; for each iteration, available time position and amplitudes are determined according to system energy; through utilization of a square error of part spectrum observation data and part spectrum synthesized data, whether convergence of the iteration exists is determined; if the convergence exists, iteration stops; and according to the reflection coefficient pulse number and the available time positions and amplitudes, a nonzero reflection coefficient sequence is reconstructured. Through utilization of time varying wavelets, the method is more realistic. The non-linear method and the linearity method are combined, and the calculating precision is raised.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration and inversion, in particular to a globally optimized time-varying sparse deconvolution method and device. Background technique [0002] In the field of geophysical exploration, the collected 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. It is the result of the convolution of seismic wavelets and reflection coefficients, that is A convolution model commonly used in subsequent seismic data processing and inversion. Among them, the reflection coefficient is related to the elastic characteristics of the underground medium, and contains the information of the subsurface lithology interface. Compared with the seismic waveform data, the reflection coefficient has a wider frequency band and higher resolution. Therefore, in order to obtain high-resolution reflection...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/282G01V2210/70
Inventor 袁三一纪永祯王铁一邓智勇王尚旭
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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