石油物探2024，Vol.63Issue(1)：69-78,10.DOI:10.12431/issn.1000-1441.2024.63.01.006
利用直达波计算稳健的深水OBN双检匹配算子
A robust dual-sensor calibration algorithm using direct waves in deep-water OBN survey
摘要
Abstract
In deep-water exploration,the frequency notch of seismic signals caused by ghost at the receiver point poses a major challenge to broadband seismic exploration.The point is how to separate upgoing and downgoing wave fields for dual-sensor combi-nation,which relies on the mathematical relations between upgoing and downgoing wave fields and between geophone and hydro-phone wave fields for dual-sensor calibration.The challenge is that inaccurate static correction and S-wave noises in geophone re-cords will deteriorate dual-sensor calibration based on reflected waves.Our method uses direct waves within a small time window for LMO correction and common receiver stacking,and then the operator at each receiver point is derived from stacked direct waves of geophones and hydrophones for dual-sensor calibration,followed by the separation of upgoing and downgoing wave fields.Cross-ghosting is unnecessary in this process,and operator calculation will not be affected by noises owing to the utilization of di-rect waves instead of reflected waves.As shown by deep-water seismic data processing,the operators obtained from direct waves for deep-water OBN dual-sensor calibration are more robust and perform well in OBN wave field separation after dual-sensor cali-bration and combination.关键词
海底节点,直达波/校正/上行波/下行波/匹配算子/波场分离Key words
ocean bottom node(OBN)/direct wave/calibration/upgoing wave/downgoing wave/matching filter/wavefield separa-tion分类
天文与地球科学引用本文复制引用
王明星,张庆淮,朱立彬..利用直达波计算稳健的深水OBN双检匹配算子[J].石油物探,2024,63(1):69-78,10.基金项目
中石化地球物理公司技术攻关课题(SGC202207,SGC202301)资助.This research is financially supported by Project from Sinopec Geophysical Corporation(Grant Nos.SGC202207,SGC202301). （SGC202207,SGC202301）
