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Method, device and system for elastic parameter inversion

An elastic parameter and inversion technology, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of waveform distortion, affecting the accuracy of inversion results, affecting the accuracy of calculation results, etc., to improve accuracy and avoid single interface Assumptions and Effects of Elasticity Assumptions

Active Publication Date: 2021-06-25
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] However, in the conventional AVO technology inversion process based on the Zoeppritz equation, due to the assumption of a single interface in the calculation process, the reflected wave information is only calculated once, and the influence of transmission loss, interlayer multiple waves, and interlayer converted waves is ignored, which affects the accuracy of the calculation results. At the same time, this method also uses the elastic assumption, ignoring the effects of attenuation and dispersion, but the actual underground medium is not completely elastic, and the attenuation effect of seismic waves will also lead to the reduction of wavelet amplitude and waveform distortion, reducing the resolution of seismic records rate, which affects the accuracy of the inversion results

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  • Method, device and system for elastic parameter inversion
  • Method, device and system for elastic parameter inversion
  • Method, device and system for elastic parameter inversion

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[0049] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification Obviously, the described embodiments are only some of the embodiments in the description, not all of them. Based on one or more embodiments in the description, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the embodiments of the description.

[0050] figure 1It is a schematic flow chart of an embodiment of the elastic parameter inversion method provided in this specification. Although this description provides the method operation steps or device structures as shown in the following embodiments or accompanying drawings, more or less operation steps may be included...

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Abstract

The embodiment of this specification discloses an elastic parameter inversion method, device and system. The method processes the viscoelastic wave equation according to the vectorized compound matrix method and the KF attenuation model to obtain a total propagation response model; according to the total propagation The response model determines the seismic reflection coefficient of the target work area; obtains the seismic wavelet of the target work area, and convolves the seismic reflection coefficient with the seismic wavelet to obtain a seismic record; uses an iterative algorithm to invert the seismic record, The elasticity parameter of the target work area is obtained. By using various embodiments of the present specification, the precision of elastic parameter inversion can be greatly improved.

Description

technical field [0001] The present invention relates to the technical field of seismic exploration and processing, in particular to an elastic parameter inversion method, device and system. Background technique [0002] Seismic inversion technology is the main means of obtaining reservoir information other than well locations. Its main task is to estimate elastic parameters through seismic data, provide basic constraint information for reservoir modeling, and then obtain reservoir lithofacies and physical property distribution information. [0003] Among them, post-stack seismic inversion, as a core technology in seismic inversion methods, plays an important role in the exploration and development of oil and gas reservoirs. The information such as wave impedance obtained by inversion can effectively identify oil and gas distribution. But the post-stack data assumes that the seismic data acquisition is self-excited and self-retracting, and the amplitude does not change with t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/282G01V1/306G01V2210/6242
Inventor 李景叶陈小宏李远强刘国昌马继涛王守东
Owner CHINA UNIV OF PETROLEUM (BEIJING)