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Method for calculating 3D high-frequency static correction value

A static correction and high-frequency technology, applied in the field of seismic exploration data processing, can solve problems such as poor application effect, and achieve the effect of improving the quality of stacked sections, improving continuity, and smoothing the time-distance relationship of first arrivals

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Existing techniques for calculating high-frequency statics do not work well in complex mountainous areas, because mountainous areas have very complex near-surface structures and first-arrival time-distance relationships

Method used

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  • Method for calculating 3D high-frequency static correction value
  • Method for calculating 3D high-frequency static correction value
  • Method for calculating 3D high-frequency static correction value

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0031] Basic principle of the present invention is as follows:

[0032] In the three-dimensional case, when the accuracy of the static correction is high enough, the change of the first arrival time with the spatial position of the shot point and the receiving point should be smooth, and if it is not smooth, it means that there is a residual static correction, which is the premise of the present invention .

[0033] The present invention firstly establishes a common shot point gather data body, and establishes a gather information data table containing first arrival information and coordinate information on the basis of applying the datum surface static correction amount, and partitions the gather information data table according to a certain method, The offset distance is segmented, the fitting area is established, and the data falling into each fitting area is stat...

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Abstract

The invention provides a method for calculating the 3D high-frequency static correction value, and belongs to the field of seismic exploration data processing. The method comprises the steps of performing partitioning, offset segmenting and fitting area establishing on a gather information data table according to a certain way, working out the fitting time difference through quadric surface fitting for data falling into the fitting areas, eliminating abnormal fitting time difference values, and calculating the high-frequency static correction value according to the fitting time difference.

Description

technical field [0001] The invention belongs to the field of seismic exploration data processing, and in particular relates to a method for calculating 3D high-frequency static correction. Background technique [0002] Static correction technology is one of the key technologies in seismic data processing. The existing near-surface modeling technology can obtain low-frequency components and some high-frequency components, and the reflected wave residual static correction technology can only obtain residual static correction less than 1 / 2 period. In order to obtain the large residual static correction caused by measurement error and insufficient modeling accuracy, many scholars use the first arrival information or refracted wave information, on the premise of fitting the first arrival time-distance relationship to obtain a smooth curve, extract the time difference, and calculate the shot point reception Point high frequency static correction amount. The existing methods for ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 关琳琳胡中平林伯香
Owner CHINA PETROLEUM & CHEM CORP