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A seismic inversion method and device

A seismic inversion and seismic data technology, applied in the field of geophysical exploration, can solve the problems of poor dispersion curve accuracy and low seismic inversion accuracy, and achieve the effect of improving accuracy

Active Publication Date: 2018-09-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the above methods in the prior art, for the work area where the surface waves are not very developed, a high-precision frequency-velocity spectrum cannot be obtained by using one analysis time window, resulting in poor precision of the generated dispersion curve, which makes the seismic inversion The accuracy is lower

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  • A seismic inversion method and device
  • A seismic inversion method and device

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Embodiment Construction

[0038] 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.

[0039] An embodiment of the seismic inversion method of the present application is introduced below, as figure 1 As shown, this embodiment may include:

[0040] S101: Divide the work area according to the seismic data of the work area to obtain the division of the work area.

[0041] The work area generally refers to the area where geol...

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Abstract

The embodiment of the invention discloses a seismic inversion method and device. The seismic inversion method comprises steps of: dividing a work area according to seismic data of the work area to obtain subareas of the work area; acquiring the surface wave type and single-shot seismic data of each subarea; determining various analysis time widows of each subarea according to the surface wave type and single-shot seismic data of each subarea; acquiring the frequency-speed spectrum, of the single-shot seismic data of each subarea, in the various analysis time widows of the subarea; generating the frequency dispersion curve of each analysis time widow according to the frequency-speed spectrum in various analysis time widow of the subareas; and performing seismic inversion on the work area based on the frequency dispersion curve of each analysis time widow of each subarea. The seismic inversion method and device may increase the precision of seismic inversion.

Description

technical field [0001] The application belongs to the technical field of geophysical exploration, and in particular relates to a seismic inversion method and device. Background technique [0002] Seismic inversion mainly uses the observed seismic data to image the spatial structure and physical properties of underground strata. At present, the research on seismic inversion using surface waves has been carried out for a long time, and good results have been achieved, wherein the surface waves can include Rayleigh Wave and Love Wave Wait. [0003] In the prior art, surface wave dispersion curves are mainly extracted from seismic data based on methods such as phase shift method, f-k method, and τ-p method, and the spatial structure and physical properties of the formation are inverted based on the extracted surface wave dispersion curves. Wherein, the dispersion curve generally refers to the variation curve of the phase velocity of the seismic wave with frequency or wavelengt...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 姜福豪李培明张翊孟张奎
Owner BC P INC CHINA NAT PETROLEUM CORP