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Post-stack seismic inversion method and device

A seismic inversion and inversion technology, applied in the field of geophysical exploration, to achieve the effect of improving inversion accuracy

Active Publication Date: 2016-09-21
PETROCHINA CO LTD
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Problems solved by technology

[0004] The present invention provides a post-stack seismic inversion method and device to solve the problem that it is difficult to achieve quantitative description in reservoir prediction in the prior art

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  • Post-stack seismic inversion method and device

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[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] The invention provides a post-stack seismic inversion method to solve the problem in the prior art that it is difficult to achieve quantitative description in reservoir prediction by using logging data interpolation to obtain an initial model for inversion.

[0042] figure 1 It is a flow chart of the post-stack seismic inversion method in the embodiment of the present invention. Such as figure 1 As shown, post-stack seismic inversion methods include: ...

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Abstract

The invention provides a post-stack seismic inversion method and device. The method comprises the steps that synthetic seismic data are obtained according to an initial model of wave impedance and actual seismic data; the initial model of wave impedance is optimized according to the actual seismic data and the synthetic seismic data so that first optimal wave impedance is obtained; high-pass filtering is performed on the first optimal wave impedance so that the high frequency inversion result of wave impedance is obtained; the actual seismic data envelopment is obtained according to the actual seismic data, and the synthetic seismic data envelopment is obtained according to the synthetic seismic data; the initial model of wave impedance is optimized according to the actual seismic data envelopment and the synthetic seismic data envelopment so that second optimal wave impedance is obtained; low-pass filtering is performed on the second optimal wave impedance so that the low frequency inversion result of wave impedance is obtained; and a final inversion result of wave impedance is obtained according to the high frequency inversion result of wave impedance and the low frequency inversion result of wave impedance. With application of the post-stack seismic inversion method and device, the inversion accuracy can be enhanced and quantitative description can be realized in reservoir prediction.

Description

technical field [0001] The present invention relates to the technical field of geophysical exploration, in particular to a post-stack seismic inversion method and device. Background technique [0002] Seismic exploration is to excite an artificial seismic source on the surface, and the vibration caused by the seismic source propagates underground in the form of seismic waves, and under certain conditions, it is reflected upwards and sent back to the surface, and then the seismic waves are reflected back by the geophone data to obtain seismic records (also called earthquakes data). Seismic data is obtained through the underground medium, which is bound to be affected by the physical properties of the underground medium (such as lithology, density, porosity, etc.), which includes not only reflected waves, but also noise, direct waves, surface waves, etc. To use seismic data to predict oil and gas in underground reservoirs, data processing is first required to remove various n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50
CPCG01V1/50
Inventor 魏超李劲松
Owner PETROCHINA CO LTD
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