Method and device for acquiring common-azimuth-angle seismic data

Abstract

The invention discloses a method and a device for acquiring common-azimuth-angle seismic data. The method includes: building a coordinate system which is used for mapping the seismic data; building statistical points, which are arranged on the basis of a preset rule and used for storing seismic channel data mapped to the statistical points and mapped to positions near the statistical points, in the coordinate system; determining a to-be-extracted azimuth angle, and building the index of the statistical points located in the to-be-extracted azimuth angle; mapping the seismic data to the coordinate system, and by the statistical points, storing the seismic channel data mapped to the statistical points and mapped to positions near the statistical points; traversing the index to obtain the seismic channel data stored by the statistical points located in the to-be-extracted azimuth angle. By the method and the device for acquiring the common-azimuth-angle seismic data, fast common-azimuth-angle seismic data extraction can be performed during wide-azimuth exploration seismic data processing.

Description

technical field [0001] The present application relates to the field of seismic exploration, in particular to a method and device for acquiring seismic data with a common azimuth. Background technique [0002] The finer description of subsurface structure and lithology requires better illumination and higher frequency of uniform multiple coverage, so wide-azimuth exploration is becoming more and more popular. In wide-azimuth exploration, the receiving channels are increased several times, especially the arrangement of receiving lines in the shot is greatly increased to obtain finer bin coverage and a more uniform azimuth distribution in bins, in order to improve the seismic data processing effect. However, the wide azimuth angle highlights the large influence of different azimuthal anisotropies, which must be fully accounted for in the treatment. Therefore, when processing wide-azimuth seismic data, many existing processing steps require azimuth-based processing. Adjacent se...

AI Technical Summary

Problems solved by technology

However, during wide-azimuth exploration, the total number of seismic data traces increases sharply, and sometimes after increasing to the current scale of 100 million traces, the traditional method uses trigonometric functions to calculate the azimuth angle in step S1. The time expenditure increases sharply

If the time expenditure of step 2 and step 3 is combined, the time for sorting and extracting seismic data with a common azimuth can be as long as several hours or days, which takes up a lot of seismic data processing time, affects the processing efficiency of seismic data, and is extremely unfavorable Efficient processing at the seismic acquisition site

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