海底电缆转换波数据处理关键技术及在南海某区的应用  

Key Technology of OBC Converted Wave Processing and Its Application in Certain Area of the South China Sea

作　　者：张兴岩 张立霞 方中于 张敏 丑纪辉 Zhang Xingyan;Zhang Lixia;Fang Zhongyu;Zhang Min;Chou Jihui(Data Processing Company,Geophysical-China Oilfield Services Limited,Zhanjiang Guangdong 524057,China)

机构地区：[1]中海油服物探事业部特普公司,广东湛江524057

出　　处：《工程地球物理学报》2022年第6期791-801,共11页Chinese Journal of Engineering Geophysics

基　　金：中海油服科研项目(编号:WTB20YF006)。

摘　　要：随着OBS(Ocean Bottom Seismic,OBS)采集成本的降低,海洋地震勘探中多波多分量地震资料越来越多;但是由于目前国内缺乏相应的成熟的海底电缆转换波数据处理技术,大部分工区批量生产时仅仅使用了纵波P、Z两个分量,其转换波X、Y分量没有使用,这使得海底电缆转换波中包含的岩性、裂缝、油气识别等信息没有得到充分应用,其性价比大大降低。本文通过分析我国南海某工区海底电缆转换波数据,并根据海底电缆转换波数据自身的特点,对海底电缆转换波地震数据处理的关键技术R、T分量旋转、转换波静校正、转换波高维插值、转换波速度分析与转换波叠前时间偏移等进行了研究,并在实际海底电缆转换波处理中得到了较为理想的转换波地震剖面,为后续转换波的进一步应用打下了坚实的数据基础。With the decrease of OBS acquisition cost,more and more multi wave and multi-component seismic data are available in marine seismic exploration.However,due to the lack of corresponding mature data processing technology for OBC converted waves in China,most work areas only use P and Z components,but the X and Y components of converted waves are not sufficiently used,which hinders the efficient application of the lithology,cracks,oil and gas identification and other information contained in the OBC converted waves,thus greatly reducing its cost performance.In this paper,by analyzing the OBC converted wave data in some work area of South China Sea,and the characteristics of the OBC converted wave data,the key technologies of the OBC converted wave data processing are studied,such as R and T component rotation,converted wave static correction,converted wave high-dimensional interpolation,converted wave velocity analysis and converted wave pre-stack time migration,etc.,and an ideal converted wave seismic section is obtained in the actual OBC converted wave processing,which lays a solid data foundation for further application of the subsequent converted wave.

关 键 词：海底电缆 转换波 RT分量 共转换点 

分 类 号：P631.4[天文地球—地质矿产勘探]