Seismic response simulation method based on VTI anisotropic propagation matrix

A technology of propagation matrix and anisotropy, which is applied in the field of seismic response simulation based on VTI anisotropic propagation matrix, can solve problems such as anisotropy that are rarely considered, and achieve the effect of improving description accuracy, accuracy, and understanding

Inactive Publication Date: 2019-12-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Currently, conventional synthetic seismic records are based on the assumption of a single interface, with little consideration of anisotropy

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  • Seismic response simulation method based on VTI anisotropic propagation matrix
  • Seismic response simulation method based on VTI anisotropic propagation matrix
  • Seismic response simulation method based on VTI anisotropic propagation matrix

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[0058] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0059] The technical solution of the present invention will be described below with a specific example of seismic response simulation based on the VTI anisotropic propagation matrix for a shale reservoir section of a certain well.

[0060] A kind of seismic response simulation method based on VTI anisotropic propagation matrix, this method comprises the following steps:

[0061] Step 1. Obtain the elastic parameters of the VTI medium through petrophysical modeling according to the logging data; first, obtain the VTI through petrophysical modeling based on the logging data su...

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Abstract

The invention discloses a seismic response simulation method based on a VTI anisotropic propagation matrix. The method comprises steps that VTI medium elastic parameters are obtained through rock physical modeling according to logging data; a frequency-varying reflection coefficient Rf of corresponding reflection waves is calculated according to the generalized propagation matrix theory of an inelastic thin interbed reflection coefficient; an amplitude spectrum Uf of the corresponding reflection waves is solved according to the frequency-varying reflection coefficient Rf; inverse Fourier transform of the Uf is performed to obtain a reflection wave waveform ut. Compared with a seismic synthetic record obtained by a conventional convolution model, the seismic synthetic record obtained by themethod is advantaged in that waveform description precision is improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas geophysics, in particular to a seismic response simulation method based on a VTI anisotropic propagation matrix. Background technique [0002] Seismic data studies show that the combination of fracture-induced VTI anisotropy with a horizontal axis of symmetry and sedimentary or lithologically-induced anisotropy with a vertical axis of symmetry exists widely. In addition, thin interbeds of two lithologies often appear in the reservoir. Conventional synthetic seismic records are obtained by convolution of reflection coefficient and wavelet, where reflection coefficient can be calculated by Zoeppritz equation or approximate expression of reflection coefficient. The commonly used approximate expression of reflection coefficient is limited to the assumption of describing a single interface, and the convolution calculation method based on the time domain cannot describe the phenomenon of composite ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40G01V1/28
CPCG01V1/282G01V1/40
Inventor 刘宇巍刘喜武霍志周张远银刘炯刘志远钱恪然
Owner CHINA PETROLEUM & CHEM CORP
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