Isotropic elastic parameter amplitude-preserving inversion method and device

A technology of isotropic and elastic parameters, which can be used in measurement devices, instruments, scientific instruments, etc., and can solve problems such as large errors

Inactive Publication Date: 2019-03-29
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology

When the structure of the underground medium is complex and the disturbance of physical parameters is large, the results obtained by using these methods often have large errors, and it is difficult to perform high-fidelity inversion imaging

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  • Isotropic elastic parameter amplitude-preserving inversion method and device
  • Isotropic elastic parameter amplitude-preserving inversion method and device
  • Isotropic elastic parameter amplitude-preserving inversion method and device

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[0098]In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application. For example, in the following description, forming the second component above the first component may include an embodiment in which the first component and the second component are formed in direct contact, and may also include an embodiment in which the first component and the second component are formed in indirect contact ( That is, ther...

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Abstract

The embodiment of the invention provides an isotropic elastic parameter amplitude-preserving inversion method and device. The method comprises the steps that the imaging inversion result of each imaging point in an isotropic elastic medium model is acquired; the imaging inversion result comprises an inverse generalized Radon transform back projection operator on a P-wave scattering field; a nonlinear inversion system is constructed based on the inverse generalized Radon transform back projection operator; an illumination matrix and a quadratic term transmission coefficient of the isotropic elastic medium model are determined; and according to the inverse generalized Radon transform back projection operator, the illumination matrix and the quadratic term transmission coefficient, the nonlinear inversion system is solved to acquire the quadratic nonlinear amplitude-preserving inversion value at each imaging point in isotropic elastic medium model. According to the embodiment of the invention, the accuracy of elastic parameter reconstruction can be improved.

Description

technical field [0001] The present application relates to the technical field of seismic inversion, in particular to an isotropic elastic parameter amplitude-preserving inversion method and device. Background technique [0002] Finding oil and gas resources under complex geology has become the main goal of seismic exploration research; and extracting the physical parameters of underground media is the core task of this main goal. In general, appropriate inversion methods are required to accomplish this task. In the existing technology, there are many different effective seismic inversion methods, such as the direct amplitude-preserving inversion method based on the inverse generalized Radon transform. Compared with the traditional migration inversion method, this method can not only perform structural imaging on the location where physical parameters change abruptly or discontinuously in the subsurface medium, but also quantitatively reconstruct the discontinuity value to a...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/28G01V1/282
Inventor 毛伟建欧阳威詹毅李合群
Owner BC P INC CHINA NAT PETROLEUM CORP
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