石油物探2025，Vol.64Issue(4)：622-638,17.DOI:10.12431/issn.1000-1441.2024.0009
莺歌海盆地东方1-1底辟区OBN采集技术与纵波成像突破
OBN acquisition technology and P-wave imaging for the Dongfang 1-1 diapir area,Yinggehai Basin
摘要
Abstract
The Dongfang 1-1 diapir area in the Yinggehai Basin has superior conditions for hydrocarbon accumulation.Several shallow gas fields have been proven in this area using high-resolution towed streamer seismic data.However,the widespread seismic fuzzy zones in the medium-deep layers exhibit low imaging resolution,which cannot be addressed even through rounds of reprocessing,thus seriously restricting the hydrocarbon exploration process in the central depression zone.After identifying the genetic mechanisms of the fuzzy zones,this paper proposes a set of seismic acquisition and P-wave processing technology system based on ocean bottom node(OBN),and innovatively designs an"three highs and one low"(high signal-to-noise ratio,high fold,high quality,and low cost)OBN geometry-variable acquisition scheme to break through the interferences of shallow gas shielding and diapiric fractures.Moreover,the key technologies such as dual-sensor summation in the wavelet domain,full-waveform inversion(FWI)in viscoelastic media and Kirchhoff prestack depth Q-migration are combined to significantly improve the accuracy of OBN P-wave imaging.Applications show that the newly acquired seismic data are significantly improved in the signal-to-noise ratio(SNR)compared with the old data,thus enabling more accurate and reliable velocity modeling.The proposed technology system allows for the first realization of clear imaging of diapir cores in greatly reduced fuzzy areas,providing high-quality data for the hydrocarbon exploration in the medium-deep layers of the Dongfang 1-1 diapir area.关键词
莺歌海盆地/底辟模糊带/海底节点/全波形反演/地震波成像Key words
Yinggehai Basin/diapir fuzzy area/OBN/FWI/seismic wave imaging分类
能源科技引用本文复制引用
袁全社,李芳,欧阳敏,任婷,黎孝璋,李远芳..莺歌海盆地东方1-1底辟区OBN采集技术与纵波成像突破[J].石油物探,2025,64(4):622-638,17.基金项目
中国海洋石油集团公司十四五重大科技项目"海上深层/超深层油气勘探技术"课题4"复杂边缘海盆地深层/超深层油气成藏条件与成藏机制研究-莺琼盆地"(CNOOC KJGG2022-0404)资助.This research is financially supported by the CNOOC Research Project(Grant No.CNOOC KJGG2022-0404). （CNOOC KJGG2022-0404）
