Inversion method, inversion device, computer equipment and computer readable storage medium

Abstract

The invention provides an elastic isotropic medium parameter inversion method. The inversion method comprises the following steps: constructing a generalized Radon transform operator in a frequency domain according to an incident wave field at an incident point, a scattered wave field at a detection point and disturbance parameters at a scattering point; obtaining a generalized Radon inverse transformation operator in an angle domain according to the generalized Radon transformation operator; and obtaining an inversion value of the disturbance parameter at the scattering point according to a generalized Radon inverse transformation operator in the angle domain. The invention further provides an elastic isotropic medium parameter inversion device. Generalized Radon transformation suitable for the elastic isotropic medium is provided, and the generalized Radon positive evolution relational expression meeting the multi-wave multi-component actual requirement is designed, so a background wave field expression does not need to be replaced with a traditional Green function tensor.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration, and in particular relates to an inversion method and an inversion device for parameters of an elastic isotropic medium, as well as computer equipment and a computer-readable storage medium. Background technique [0002] Multi-wave and multi-component seismic data can accurately reflect the wave field propagation information of elastic (or viscoelastic) media, which is more in line with the actual situation of underground detection media. Compared with conventional single-component acoustic wave information, multi-component seismic data contains multi-mode vector field information, so that the kinematic or dynamic properties of multi-mode and their differences can be used to study the rock lithology of oil and gas reservoirs and physical properties, rock fracture development status, fluid property detection, etc. Therefore, multi-wave and multi-component data can provide a richer eval...

AI Technical Summary

Problems solved by technology

When there is multipath in the subsurface, the existing generalized Radon transform inverse scattering inversion results are inaccurate

[0006] Secondly, the existing generalized Radon transform inversion method is based on the Born approximation single scattering theory, which requires that the disturbance parameter is much smaller than the background parameter

When the disturbance parameter is close to the magnitude scale of the background parameter, the inversion result of the conventional generalized Radon transform will be inaccurate

[0007] Thirdly, in the existing multi-parameter generalized Radon transform inverse scattering inversion method, the integral domains of scattering angle, azimuth angle and dip angle all have certain uncertainties. So far, few literatures have raised and discussed this problem, which is different from Most multi-parameter inversions are still at the stage of theoretical discussion

This has something to do with the complexity and diversity of wave field propagation properties in elastic media, but it is more due to the fact that the existing generalized Radon transform multi-parameter inverse scattering inversion theoretical formula is difficult to achieve

In addition, in the elastic multi-parameter inversion, the existing generalized Radon transform inversion uses the Green’s function tensor to represent the background wave field, which is not in line with the actual situation of seismic data acquisition, which further increases the elastic multi-parameter inversion. Practical Difficulty of Acting

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