Common-posture gather azimuthal angle analyzing and correcting method and device

Abstract

The invention provides a common-posture gather azimuthal angle analyzing and correcting method and device. The common-posture gather azimuthal angle analyzing and correcting method comprises the steps that postures of detectors in a common-receiver gather are recognized, seismic data with the same postures are extracted from the common-receiver gather to form common-posture gathers; azimuthal angle deviation value analysis is carried out on each common-posture gather and an azimuthal angle deviation value of each detector with a corresponding posture is obtained from the common-posture gathers; according to the azimuthal angle deviation value of the detector of each common-posture gather, azimuthal angle correction is carried out on three-component seismic data corresponding to the detector; according to dip angles provided by a seism acquisition system, dip angle correction is carried out on the three-component seismic data having subjected to azimuthal angle correction, and therefore final three-component seismic data can be obtained. The common-posture gathers are provided, azimuthal angle analysis and correction are carried out on the different common-posture gathers independently, meanwhile, theoretical errors, corresponding to matrix operations, of dip angle correction and azimuthal angle correction are overcome, and therefore high-fidelity transverse-wave seismic data and longitudinal-wave seismic data can be obtained through the common-posture gather azimuthal angle analyzing and correcting method.

Description

Technical field [0001] The invention relates to the field of seismic exploration, in particular to a method and device for analyzing and correcting the attitude gather azimuth angle of the Chinese Communist Party in multi-wave seismic exploration. Background technique [0002] Multiwave seismic exploration, also known as converted wave seismic exploration, or three-dimensional three-component (3D3C) seismic exploration, is one of the two main branch technologies in the field of applied geophysics; the other main branch technology is longitudinal wave seismic prospecting. Only a single component of seismic survey observation data is received, which belongs to scalar seismic survey. Specifically, multi-wave seismic exploration uses three-component geophones to simultaneously receive seismic exploration observation data of three components: Z, X, and Y components. The polarization directions of the widely used three-component geophones are orthogonal to each other, where the polari...

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Problems solved by technology

However, this is inconsistent with the matrix operation theory. Only when there is no azimuth angle deviation or the azimuth angle deviation is small, and the azimuth angle correction matrix can be approximated as a unit matrix, can the commutation law of matrix operation be satisfied, and the inclination angle correction can be performed first, and then the azimuth angle correction can be performed. Correction

[0007] The inventor found in the research that due to the above two factors in the prior art, the fidelity of vector seismic data in multi-wave seismic exploration is affected

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