Full waveform inversion method based on preconditioned conjugate gradient acceleration algorithm

A technology of full waveform inversion and conjugate gradient, applied in the field of seismic exploration inversion imaging, can solve the problems of slow convergence speed and low inversion accuracy in deep parts, and achieve the effects of improving accuracy, reducing calculation amount, and weakening errors.

Inactive Publication Date: 2019-07-26
SICHUAN INST OF GEOLOGICAL ENG INVESTIGATION
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[0007] The purpose of the present invention is to provide a fast and effective preconditioned conjugate gradient full waveform inversion method for the defects of slow convergence speed and low inversion precision of the exi

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  • Full waveform inversion method based on preconditioned conjugate gradient acceleration algorithm
  • Full waveform inversion method based on preconditioned conjugate gradient acceleration algorithm
  • Full waveform inversion method based on preconditioned conjugate gradient acceleration algorithm

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[0038] In order to make the purpose, steps and features of the present invention clearer, the embodiments and applications of the present invention will be described in detail below in conjunction with the accompanying drawings. The descriptive information provided in the specific embodiments and applications is only an example for explaining the present invention, and should not be used as a limitation of the present invention. Various extensions and combinations of the embodiments described herein will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention .

[0039] figure 1 It is a flow chart of frequency domain multi-scale acoustic wave full waveform inversion according to the present invention. Such as figure 1 As shown, a full waveform inversion method based on a preconditioned conjugate gradient acceleration algorithm in an em...

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Abstract

The invention discloses a full waveform inversion method based on preconditioned conjugate gradient acceleration algorithm, and belongs to the technical field of seismic exploration inversion imaging.According to the method, the shortcomings of slow convergence speed and low deep inversion accuracy of conjugate gradient full waveform inversion methods are overcome. The advantages of a gradient preconditioning operator and a Nesterov acceleration gradient descent method are combined, while the deep inversion accuracy of the conjugate gradient full waveform inversion method is improved, the convergence speed is effectively increased, thus the calculation amount of full-waveform inversion is reduced, and the technical support is provided for practical application of the full-waveform inversion.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration inversion imaging, and relates to a full waveform inversion method based on a preconditional conjugate gradient acceleration algorithm. Background technique [0002] Seismic full waveform inversion has a very complete mathematical basis, makes full use of the kinematics and dynamics information of the pre-stack seismic wave field, and has the ability to reveal geological structure details and lithological parameters under complex geological conditions. It is currently recognized as the most accurate modeling techniques. Since Lailly (1983) and Tarantola (1984) introduced the concept of full waveform inversion into the field of petroleum seismic exploration, this technology has received more and more attention in the research and application of seismic velocity modeling, and has become an important It is one of the research hotspots in the field of physical prospecting. [0003] The r...

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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 刘伟安世泽夏波陈全邓在刚黄韬何中江李汤伟蒲海龙鄢健沈伟新
Owner SICHUAN INST OF GEOLOGICAL ENG INVESTIGATION
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