High-precision longitudinal and transverse wave impedance inversion method

A technology of shear wave impedance and compression shear wave, applied in the field of high precision compression shear wave impedance inversion, which can solve the problems of low inversion accuracy, low vertical resolution, and poor sparsity of AVO inversion methods.

Active Publication Date: 2019-12-06
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology

[0004] The technical problem solved by the solution provided according to the embodiment of the present invention is that the commonly used AVO inversion method has poor sparsity, low vertical resolution and low inversion accuracy

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  • High-precision longitudinal and transverse wave impedance inversion method
  • High-precision longitudinal and transverse wave impedance inversion method
  • High-precision longitudinal and transverse wave impedance inversion method

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Embodiment Construction

[0039] 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.

[0040] figure 1 It is a flow chart of a high-precision longitudinal and shear wave impedance inversion method provided by an embodiment of the present invention, as shown in figure 1 shown, including:

[0041] Step S101: Optimizing and deriving the approximate relation of seismic reflection coefficient of longitudinal and shear wave impedance and density to obtain the optimized approximate relation of longitudinal and shear wave impedance and reflection coefficient;

[0042] Step S102: performing odd-even decomposition on the reflection coefficients in the optimized longitudinal and transverse wave impedance reflection coefficient approximate relationshi...

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Abstract

The invention discloses a high-precision longitudinal and transverse wave impedance inversion method. The method comprises the following steps of firstly, further optimizing a longitudinal and transverse wave impedance reflection coefficient approximation formula on the basis of a Fatti approximation formula; secondly, building an L1-2 minimum inversion objective function of synchronous constraintof a longitudinal and transverse wave impedance low-frequency model according to a reflection coefficient odd-even decomposition theory and a Lagrangian multiplier method; and finally, solving the function by combining a difference of convex algorithm (DCA) and an alternating direction method of multipliers (ADMM) to obtain longitudinal and transverse wave impedance.

Description

technical field [0001] The invention relates to the technical field of seismic pre-stack inversion, in particular to a high-precision compressional and transverse wave impedance inversion method. Background technique [0002] Seismic prestack inversion is an effective way to identify and evaluate reservoir fluids. The pre-stack AVO (AmplitudeVariation with Offset, amplitude variation with offset) inversion method is one of the main techniques for obtaining fluid identification factors. This inversion method can comprehensively utilize well logging and rock physics data. Therefore, in practice attention in the application. [0003] The core of the pre-stack AVO inversion method includes two parts: reflection coefficient approximation formula and inversion algorithm. Many scholars have obtained different forms of approximate formulas for reflection coefficients by simplifying the Zoeppritz equation. However, all inversion methods are based on L 1 Although the convex optimi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01V1/28
CPCG01V1/282G01V1/306G01V2210/6226
Inventor 聂文亮文晓涛李波何健黄伟李垒陈芊澍
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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