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A method for reverse time migration imaging of pure qp waves in viscoacoustic tti media

A technology of reverse time migration imaging and medium, which is applied in the field of exploration geophysics, can solve the problems of inapplicability, and achieve the effect of amplitude fidelity and high imaging resolution

Active Publication Date: 2022-05-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is often not suitable for strongly anisotropic media with a tilted axis of symmetry (ie, transverse isotropy with a tilted axis ofsymmetry, TTI), so it is necessary to develop a reverse time migration method suitable for more complex viscoacoustic TTI media

Method used

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  • A method for reverse time migration imaging of pure qp waves in viscoacoustic tti media
  • A method for reverse time migration imaging of pure qp waves in viscoacoustic tti media
  • A method for reverse time migration imaging of pure qp waves in viscoacoustic tti media

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Embodiment Construction

[0030] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] First, the calculation principles of the forward wave field and the reverse wave field in the embodiments of the present specification will be explained.

[0032] The pure qP wave wave equation of the viscoacoustic TTI medium used in the forward numerical simulation is as follows:

[0033]

[0034] Among them, the migratio...

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Abstract

The embodiment of this specification discloses a pure qP wave least squares reverse time migration imaging method in a TTI medium. The present invention obtains the forward wave field at each moment through the pure qP wave forward equation of the viscoacoustic TTI medium, and then obtains the backpropagation wave field at each moment through the pure qP wave backpropagation equation of the viscoacoustic TTI medium, and then uses the mutual Relevant imaging conditions were used to obtain the reverse time migration imaging results. Compared with the prior art, the present invention can obtain imaging results with amplitude fidelity and higher imaging resolution when the subterranean medium has viscous and strong anisotropic properties.

Description

technical field [0001] The present specification relates to the field of exploration geophysics, in particular to a reverse time migration imaging method of pure qP waves in a viscoacoustic TTI medium. Background technique [0002] Seismic exploration technology is the mainstream technology of petroleum geophysical exploration. In recent years, petroleum exploration and development has gradually transitioned from areas containing shallow layers and simple geological structures to areas containing deep-ultra-deep layers and complex geological structures. The complex fracture-cavity network in deep-ultra-deep formations and the fluid filled in the fracture-cavity network show strong anisotropy and viscous attenuation, respectively. [0003] These anisotropy and attenuation properties cause seismic waveform distortion and loss of amplitude. In seismic migration imaging, if the effects of these anisotropy and viscous attenuation are ignored, the diffracted waves cannot be fully...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/364G01V2210/51
Inventor 慕鑫茹黄建平杨继东庄苏斌张韶舜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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