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Method for building stratum velocity model

A velocity model and formation technology, applied in seismic signal processing and other directions, can solve the problem of low accuracy of formation velocity model, and achieve the effect of improving accuracy

Active Publication Date: 2016-08-10
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] The purpose of the exemplary embodiment of the present invention is to provide a method for constructing a formation velocity model to overcome the problem of low accuracy of the formation velocity model in the prior art

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  • Method for building stratum velocity model
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  • Method for building stratum velocity model

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Embodiment Construction

[0019] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0020] figure 1 A flowchart showing a method of constructing a formation velocity model according to an exemplary embodiment of the present invention. 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.

[0021] like figure 1 As shown, in step S100, existing seismic data in the work area are obtained. Here, the existing data in the work area may include drilling data, logging data and geological data.

[0022] In step S200, pre-stack time-migration processing is performed on the single-shot seismic data in the work area, so as to obtain the pre-...

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Abstract

The invention provides a method for building a stratum velocity model, which comprises the steps of (A) acquiring existing seismic data of a work area, (B) acquiring pre-stack time migration seismic data volume and pre-stack time migration imaging velocity of the work area, (C) acquiring seismic reflection stratum data of the time domain of each stratum in the work area and fault data of the work area, (D) acquiring pre-stack depth migration velocity volume of the work area, (E) determining a time-depth curve of well drilling in the work area according to an acoustic logging curve and the pre-stack time migration seismic data volume, (F) acquiring well seismic pseudo velocity of well drilling in the work area, (G) establishing a framework model of the work area, (H) establishing a stratum velocity model according to the pre-stack depth migration velocity volume, the time-depth curve of well drilling, the well seismic pseudo velocity of well drilling and the framework model of the work area, and (I) carrying out correction on the stratum velocity model by using while-drilling materials so as to acquire a while-drilling stratum velocity model. The precision of the stratum velocity model can be effectively improved according to the method provided by the invention.

Description

technical field [0001] The present invention relates generally to the field of geophysical signal acquisition. More specifically, it relates to a method of constructing formation velocity models. 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 as to estab...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 蒋波黄诚邓小江王小兰李邗康昆范增辉杨容丁登碧
Owner BC P INC CHINA NAT PETROLEUM CORP
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