A Forward Modeling Method for Acoustic Seismic Data in Viscous Media

A technology of seismic data and forward modeling, applied in the field of exploration geophysics, can solve the problems of large memory consumption, slow calculation efficiency, unfavorable reverse time migration imaging, etc., and achieve the effect of improving calculation efficiency and reducing calculation memory

Active Publication Date: 2022-05-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

At the same time, in the traditional time domain forward modeling scheme, the attenuation term and the dispersion term are coupled together, which is not conducive to the implementation of reverse time migration imaging; the frequency domain forward modeling method has problems such as slow calculation efficiency and large memory consumption

Method used

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  • A Forward Modeling Method for Acoustic Seismic Data in Viscous Media
  • A Forward Modeling Method for Acoustic Seismic Data in Viscous Media
  • A Forward Modeling Method for Acoustic Seismic Data in Viscous Media

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Embodiment Construction

[0020]In order to make the purpose of the present application, the technical solution and advantages more clear, the following will be combined with the specific embodiments of the present application and the corresponding drawings of the technical solution of the application is clearly and completely described. Obviously, the embodiments described are only a portion of the present application, not all embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those of ordinary skill in the art without doing creative work, are within the scope of protection of the present application.

[0021] First of all, it is necessary to explain the calculation principle in the simulation process of this application.

[0022] In the field of seismology, the complex numerical wavefield propagation velocity of viscous media is:

[0023]

[0024] It is also known that the expression of the spatial frequency domain viscous acoustic wave equation is:

...

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Abstract

The embodiment of this specification discloses a forward modeling method for acoustic seismic data in a viscous medium. By separating the amplitude attenuation item and the phase dispersion item, the present invention can conveniently realize the viscoacoustic reverse time migration imaging compared with the traditional forward modeling simulation of the viscoacoustic wave equation in which the attenuation item and the dispersion item are coupled together. Compared with traditional computing methods, it can greatly improve computing efficiency and reduce computing memory.

Description

Technical field [0001] This specification deals with the field of exploration geophysics, in particular with respect to a method of simulation of acoustic seismic data in viscous media. Background [0002] Due to the internal friction and fluid-containing pores in the actual underground medium, the underground medium usually behaves as viscous. When seismic waves propagate in viscous media, especially in areas of strong attenuation, energy attenuation and frequency dispersion occur. When imaging media containing attenuation media, if these viscous attenuation and frequency dispersion effects are not considered, the internal and substructure of the reservoir containing high attenuation characteristics will have weak imaging energy and inaccurate imaging position. In order to achieve accurate imaging of formations in complex viscous media, seismic orthography that considers viscous amplitude attenuation and phase dispersion effects is extremely important. At the same time, in the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30
CPCG01V1/302G01V1/282G01V2210/60G01V2210/66
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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