Gas bearing reservoir identification on OBS data in the Baiyun deep-water area,northern South China Sea
Zhu Ming1, Yan Chengzhi1, Zhang Weiwei1, Liu Jun1, Zheng Yanpeng2, Zhi Pengyao3
1. Shenzhen Branch, CNOOC, Shenzhen, Guangdong 518054, China;
2. First Institute of Oceangraphy, State Oceanic Administration, Qingdao, Shandong 266061, China;
3. College of Geosciences and Engineeering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
Abstract：In China,ocean bottom seismometer (OBS) data is only used to study deep structures of the earth or hydrate,no direct application on oil and gas exploration.In this paper we demonstrate the first application of OBS converted data directly to the oil and gas exploration in Baiyun deep water area,Pearl River Mouth Basin.Quite a few techniques are adopted such as repositioning,reorientation,dual sensor data merging,wavefield separation,down-going wave mirror imaging,and converted wave migration.In this way high-class P-and S-wave data are obtained even in sparse OBS intervals,and vP/vS data are calculated with the P-and S-waves joint inversion and used in gas bearing reservoir identification.Based on our study,gas reservoirs are charaterized by low P-wave impedance and low vP/vS,and consistent with the theoretical knowledge.The successful application of the proposed approach might be a good example for oil and gas exploration in deep water and ultra deep water in China.
朱明, 颜承志, 张卫卫, 刘军, 郑彦鹏, 支鹏遥. OBS技术在南海北部白云深水区储层含气性识别中的应用[J]. 石油地球物理勘探, 2017, 52(4): 815-825.
Zhu Ming, Yan Chengzhi, Zhang Weiwei, Liu Jun, Zheng Yanpeng, Zhi Pengyao. Gas bearing reservoir identification on OBS data in the Baiyun deep-water area,northern South China Sea. OGP, 2017, 52(4): 815-825.
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