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A Compensation Method for Static Correction

A compensation method and static correction technology, applied in seismology, instruments, measuring devices, etc., can solve the problems of not considering the incident angle and large static correction error, and achieve the effect of improving the stacking effect and reducing the static correction error

Active Publication Date: 2020-07-03
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a static correction compensation method to solve the problem that the impact of the incident angle and the outgoing angle on the static correction is not considered in the current static correction process, resulting in large static correction errors

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  • A Compensation Method for Static Correction
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Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] The present invention obtains the superposition velocity model of the whole survey line by analyzing the velocity of the whole survey line; uses the superposition velocity as the average stratum velocity to carry out smoothing and interpolation processing, and eliminates singular values. Determine the depth value of each time sample point according to the average velocity of the formation; calculate the incident angle of the corresponding time sample point in the formation according to the depth value of each time sample point, and use the obtained formation incident angle, near-surface formation velocity and formation average velocity to determine the near-surface The incidence angle of the surface stratum; the compensation coefficient is determined according to the incidence angle of the near-surface stratum, the basic static correctio...

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Abstract

The invention relates to a compensation method for static correction and belongs to the technical field of seismic data processing. According to the compensation method for static correction of the invention, conventional velocity analysis is performed on a measuring line, so that a superposition velocity model is established; a superposition velocity is adopted to replace a stratum average velocity; a near-surface stratum average velocity is calculated according to field near-surface observation data; a stratum incident angle and a stratum emergence angle are determined through shot-geophonedistances and reflection point depths; a near-surface stratum incident angle and a near-surface stratum emergence angle are determined according to a surface velocity and the stratum average velocityon the basis on an incident angle law; and a compensation coefficient is obtained, and the compensation coefficient is used for compensating a basic static correction amount. Since the influence of the near-surface stratum incident angle and the near-surface stratum emergence angle on the static correction is considered, and the influence is compensated through the form of the compensation coefficient, and therefore, compensated static correction error is decreased, and a seismic profile superposition effect is improved.

Description

technical field [0001] The invention relates to a static correction compensation method, which belongs to the technical field of seismic data processing. Background technique [0002] In the data processing of seismic exploration, static correction is an important part of seismic data processing, and it is the most commonly used technique and means in seismic data processing. The accuracy of static correction directly affects the stacking effect of the section, and also affects the accuracy of velocity analysis, thereby affecting the quality of data processing. Improving the accuracy of static correction is of fundamental and important significance to improving the accuracy of data processing. In recent years, data acquisition with low signal-to-noise ratio under complex surface conditions often adopts a large-array field seismic data acquisition method. The large-array field acquisition method can obtain more effective information and provide space for increasing the numbe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/362G01V2210/53
Inventor 黄德芹李锋胡小波廖小玲詹凤林陈从希尤丽铭武雅波江富贵张亚斌
Owner CHINA PETROLEUM & CHEM CORP
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