OBC acquisition direction selection based on model analysis
Dong Lijun1,2,3, Wang Ziqiu4, Li Yanqing4, Liu Xuming4
1. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu 73000, China; 2. Geophysical R & D Institute, China Oilfield Service Limited, CNOOC, Tianjin 300451, China; 3. CNOOC New Energy Investment Co. Ltd., Beijing 100015, China; 4. Geophysical R & D institute, China Oilfield Service Limited, CNOOC, Tanggu, Tianjin 300451, China
Abstract：The acquisition azimuth of conventional streamer seismic surveys is relatively narrow, and is unsuitable for complex structure areas. But for OBC survey, wide-azimuth data acquisition can be achieved by selecting the number of cables and a cable spacing. In this paper, based on stratigraphic model we first conduct the depth domain Delaunay triangulation on interpreted stratigraphic data, calculate split triangles spatial coordinates, and acquire geological information. Then we obtain structure trend, tendency and dips of the exploration area using statistical analysis, and build a geological model. Finally based on this model we select appropriately the number of cables and a cable spacing in OBC acquisition geometry design in order to get wider azimuth and better images of complex structures.
董立军, 王子秋, 李艳青, 刘旭明. 基于模型分析的OBC采集方向选择[J]. 石油地球物理勘探, 2014, 49(3): 437-443.
Dong Lijun, Wang Ziqiu, Li Yanqing, Liu Xuming. OBC acquisition direction selection based on model analysis . OGP, 2014, 49(3): 437-443.
