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High-speed top interface extraction method and device

A technology of top interface and top interface elevation, applied in the field of geophysical exploration

Active Publication Date: 2020-07-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

Nowadays, three methods are usually used to extract the velocity layer top interface. These methods have a certain scope of application in different situations, but in the complex near-surface area, there are also certain limitations or defect:
It can be seen that there are limitations in the application of this method

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  • High-speed top interface extraction method and device
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  • High-speed top interface extraction method and device

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Embodiment Construction

[0030] 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.

[0031] In the process of seismic exploration, the velocity layer static correction produced by the longitudinal and lateral changes of the surface structure in the exploration area is more and more important to the seismic data processing results. In order to solve the above-mentioned shortcomings in the situation where the geological conditions of different strata are not the same, the embodiment of the present invention provides a method and device for extrac...

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Abstract

The invention provides a high-speed top interface extraction method and device. The method comprises the steps: carrying out tomographic inversion calculation of seismic data to obtain a near-surfacevelocity field; according to the near-surface velocity field and a high-speed top interface elevation value at a micro-logging position, determining a chromatography inversion instantaneous velocity at the micro-logging position; and determining a high-speed top interface according to the chromatography inversion instantaneous speed. According to the method and device for extracting the high-speedtop interface, the high-speed top interface which is close to the actual high-speed top interface of a field work area to the greatest extent is extracted through chromatography inversion instantaneous speed, and the precision of a surface layer model is improved.

Description

technical field [0001] The invention relates to the field of geophysical exploration, in particular to a method and device for extracting a high-speed top interface. Background technique [0002] In recent years, with the gradual development of seismic exploration towards refinement and targeting, the velocity stratostatic correction produced by the longitudinal and lateral changes of the surface structure in the exploration area has become more and more important to the seismic data processing results. Nowadays, three methods are usually used to extract the velocity layer top interface. These methods have a certain scope of application in different situations, but in the complex near-surface area, there are also certain limitations or defect: [0003] 1) Elevation downward smoothing method: it is a method to smooth the interface after moving the surface elevation downward for a certain distance (such as 100m). It is generally applicable to areas with relatively flat surfa...

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Application Information

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IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 吕景峰王乃建陈学强闫智慧王彦峰邸江伟
Owner BC P INC CHINA NAT PETROLEUM CORP