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Velocity Field Construction Method

A construction method and velocity field technology, applied in the field of geophysical exploration, can solve problems such as the inability to construct a velocity field in a large work area, and achieve the effect of improving efficiency and accuracy

Active Publication Date: 2018-05-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for constructing a velocity field suitable for a basin-level work area, so as to solve the technical problem that the existing method for constructing a velocity field cannot construct a velocity field for a large work area

Method used

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Embodiment Construction

[0021] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0022] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the present invention as defined by the claims and their equivalents. Various specific details are included to aid in understanding but are to be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the exemplary embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0023] figure 1 is a flowchart illustrating a velocity field construction method according to an exemplary embodiment of the present invention.

[0024] refer to figure 1 , in step S10,...

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Abstract

The invention provides a velocity field construction method. The method comprises the following steps: (A) determining a target work area, and acquiring well logging data of the target work area; (B) acquiring the speed values of a plurality of scattered points in the target work area according to the well logging data of the target work area; (C) constructing a triangular net of the target work area based on velocity speeds of the plurality of scattered points by taking the plurality of scattered points as vertexes of the triangular net; (D) selecting a plurality of points to be interpolated, and calculating velocity speeds of the plurality of points to be interpolated based on the constructed triangular net; and (E) constructing a velocity field of the target work area according to the velocity speeds of the plurality of points to be interpolated. According to the velocity field construction method provided by the invention, the efficiency and the accuracy of constructing the velocity field can be effectively improved.

Description

technical field [0001] The present invention generally relates to the technical field of geophysical exploration, and more specifically, relates to a method for constructing a velocity field in a basin-level work area. Background technique [0002] At present, most of the existing seismic data interpretation adopt conventional variable-speed mapping to properly reflect the structure of underground strata. Although this method can reflect part of the structure of underground strata, it is difficult to fully confirm the structure of the target layer. The size and true position of structural high points, especially when using the conventional variable-speed mapping method for time-depth conversion, have relatively large errors. [0003] In the existing seismic data interpretation, in addition to the conventional variable-velocity mapping method, there is also an average velocity field construction method. The velocity field method cannot construct a large work area (for exampl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/30G01V1/40
CPCG01V1/303G01V1/40
Inventor 陈小二陶正喜彭才范昆徐敏范晓刘开元谭荣彪巫盛洪
Owner BC P INC CHINA NAT PETROLEUM CORP