COMMON-POSTURE GATHER AZIMUTHAL ANGLE ANALYSIS AND CORRECTION METHOD AND DEVICE

摘要

A common-posture gather azimuthal angle analysis and correction method and device, the method comprising: identifying a posture of a detector in a common-detection-point gather, and extracting seismic data having the same posture therefrom to form a common-posture gather (102); performing azimuthal angle deviation value analysis on each common-posture gather and acquiring an azimuthal angle deviation value of the detector in a corresponding posture therefrom (103); performing azimuthal angle correction on three-component seismic data corresponding to the detector according to the azimuthal angle deviation value of the detector of each common-posture gather (104); and performing dip angle correction on the three-component seismic data subjected to the azimuthal angle correction according to a dip angle provided by a seismic acquisition system so as to obtain final three-component seismic data (105). Common-posture gathers are proposed, and azimuthal angle analysis and correction are carried out on different common-posture gathers independently; meanwhile, a theoretical error of dip angle correction and azimuthal angle correction corresponding to a matrix operation is overcome; therefore, by means of the method, high-fidelity transverse-wave seismic data and longitudinal-wave seismic data can be obtained.