Rapid and high-precision post-stack seismic impedance inversion method

A high-precision, inversion technology, applied in the field of seismic impedance inversion, can solve the problems of poor horizontal continuity and low vertical resolution, achieve good horizontal continuity, high vertical resolution, and improve the inversion effect

Active Publication Date: 2019-12-06
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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[0003] The technical problem solved by the solution provided according to the embodim

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  • Rapid and high-precision post-stack seismic impedance inversion method
  • Rapid and high-precision post-stack seismic impedance inversion method
  • Rapid and high-precision post-stack seismic impedance inversion method

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[0031] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0032] figure 1 is a flow chart of a fast and high-precision post-stack seismic impedance inversion method provided by an embodiment of the present invention, as shown in figure 1 shown, including:

[0033] Step S101: Obtain the decomposed seismic convolution model of the reflection coefficient sequence by performing odd-even decomposition on the reflection coefficient sequence in the seismic convolution model;

[0034] Step S102: using the decomposed seismic convolution model of the reflection coefficient sequence and the Lagrangian multiplier method to construct an inversion objective function constrained by the synchronization of the low-frequency mod...

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Abstract

The invention discloses a rapid and high-precision post-stack seismic impedance inversion method. The method comprises the steps of performing odd-even decomposition on a reflection coefficient sequence in a seismic convolution model to obtain a reflection coefficient sequence decomposed seismic convolution model; constructing an inversion objective function constrained by a longitudinal wave low-frequency model by use of the reflection coefficient sequence decomposed seismic convolution model and a Lagrangian multiplier method; performing inversion on the inversion objective function synchronously constrained by a longitudinal wave impedance low-frequency model by use of an L1-2 minimization algorithm to obtain odd-even component coefficients; and obtaining the longitudinal wave impedanceby use of the odd-even component coefficients.

Description

technical field [0001] The invention relates to the technical field of seismic impedance inversion, in particular to a fast and high-precision post-stack seismic impedance inversion method. Background technique [0002] Seismic impedance inversion is one of the most commonly used methods for interpretation of post-stack seismic data, and has been widely used in reservoir description. The existing inversion methods have low vertical resolution and poor horizontal continuity, resulting in poor inversion results. Aiming at this problem, scholars at home and abroad have carried out in-depth research. Essentially, the existing inversion methods are all based on L 1 Norm convex optimization algorithm, considering the inherent "ill-conditioned solution" and "multiple solutions" of the seismic inversion problem, pointed out that based on L 1 The convex optimization algorithm of the norm will cause the inversion result to fall into the suboptimal sparse solution. In order to obta...

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Application Information

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IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/282G01V1/306G01V2210/6226
Inventor 聂文亮文晓涛何健李波黄伟李垒陈芊澍
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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