Method for constructing stratum velocity model

A velocity model and stratigraphic technology, applied in seismology, geophysical measurement, seismic signal processing, etc., can solve the problem of low accuracy of stratigraphic velocity model, and achieve the effect of high accuracy

Active Publication Date: 2016-11-09
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] In order to achieve the above object, the present invention is to provide a method for constructing a formation velocity model to overcome the problem of low precision of the formation velocity model in the prior art

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  • Method for constructing stratum velocity model
  • Method for constructing stratum velocity model
  • Method for constructing stratum velocity model

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Embodiment Construction

[0017] Hereinafter, the method for constructing the formation velocity model of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments

[0018] figure 1 A flowchart of a method of constructing a formation velocity model according to an exemplary embodiment of the present invention is shown. Here, as an example, the method may be implemented by a device for constructing a formation velocity model, or may be implemented entirely by a computer program.

[0019] Such as figure 1 As shown, in step S100, the existing basic data of the work area and neighboring areas are acquired. Here, the existing basic data of the work area and adjacent areas may include drilling data, logging data, geological data, seismic data, and the like.

[0020] In step S200, pre-stack time-migration processing is performed on the single-shot seismic data in the work area to obtain the pre-stack time-migration seismic data volume and the pr...

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Abstract

The invention provides a method for constructing a stratum velocity model. The method comprises the following steps of acquiring the existing single-shot seismic data of a work area; acquiring the prestack time offset seismic data volume and the prestack time offset imaging velocity volume of the work area; acquiring the time-domain seismic reflection layer bit data and the fault data of each speed control layer in the work area; acquiring the speed of each logging layered segment and the speed of each speed control segment; acquiring the speed of each speed control layer; constructing a tectonic framework model of the work area; obtaining the speed field of the work area; obtaining a depth offset velocity volume to form a final velocity model. According to the technical scheme of the invention, by utilizing the acoustic logging curve and the VSP logging curve of adjacent areas, the prestack time offset imaging velocity volume and the prestack depth offset velocity volume of the work area, a surface geological map and the tectonic framework model of the work area, a formation velocity model is established. Therefore, the method can be applied to the exploration of new areas and is high in precision.

Description

technical field [0001] The invention relates to the fields of geophysical signal acquisition and seismic data interpretation. Specifically, it relates to a method for constructing a formation velocity model. Background technique [0002] In seismic data interpretation, the formation velocity model is mainly used for time-depth conversion. Therefore, the accurate establishment of formation velocity model is one of the core tasks of seismic data interpretation, and is an important prerequisite and key work content for obtaining reasonable and good geological results. [0003] At present, the relatively mature method of establishing the formation velocity model is based on the seismic velocity, using the time-depth curve of drilling in the research area or well layering-seismic horizon velocity (that is, the pseudo-velocity of drilling well) to analyze the structure model and rock formation velocity. Constraint correction is performed on the framework of the anomalous body, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/303
Inventor 蒋波邓小江王小兰李邗范增辉康昆黄诚杨容程莉莉王梦
Owner BC P INC CHINA NAT PETROLEUM CORP
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