物探与化探2026，Vol.50Issue(3)：481-488,8.DOI:10.11720/wtyht.2026.1011
南海西部W凹陷OBC资料处理关键技术研究与应用
Research and application of key technologies for processing ocean bottom cable seismic data from the W Sag in the western South China Sea
摘要
Abstract
The W Sag in the western South China Sea has been extensively explored.Consequently,most oilfields in the sag have transi-tioned into the medium to high water cut stage,facing challenges in tapping potential reserves and maintaining stable production.In this context,both hydrocarbon exploration in complex concealed reservoirs in the Paleogene strata and paleo-buried hills and fine-scale po-tential tapping in mature oilfields have become primary targets for reserve growth and production addition.However,under complex geo-logical conditions,seismic exploration faces multiple issues,including complex seismic wavefields,weak seismic signals,low resolution,and strong anisotropy.To address the challenges encountered in the exploration and exploitation of complex reservoirs in the western South China Sea,this study investigated key technologies in terms of ghost wave suppression,multiple suppression,and high-precision velocity modeling.To this end,the characteristics of the acquired wide-azimuth ocean bottom cable(OBC)seismic data were considered,and the approach to broadening frequencies and preserving amplitude was followed.Consequently,a set of key technologies for process-ing the OBC seismic data of structurally complex areas was established,effectively improving the signal-to-noise ratio and imaging qual-ity of seismic data.Application to actual data demonstrates that the technologies established in this study substantially enhanced seismic data quality,laying a solid foundation for the fine-scale geophysical characterization of complex reservoirs.关键词
海洋地震勘探/复杂构造区/OBC 地震资料/宽方位地震处理/多次波压制/全波形反演/南海西部Key words
offshore seismic survey/structurally complex area/ocean bottom cable(OBC)seismic data/wide-azimuth seismic process-ing/multiple suppression/full-waveform inversion(FWI)/western South China Sea分类
天文与地球科学引用本文复制引用
周凡,李明,谭港,鲁统祥,袁梦雨,丑纪辉..南海西部W凹陷OBC资料处理关键技术研究与应用[J].物探与化探,2026,50(3):481-488,8.基金项目
中海石油(中国)有限公司湛江分公司综合科研项目"北部湾盆地页岩油资源评价与有利区带预测"(KJZH-2023-2106) （中国）
