Oil-gas reservoir in the Mesozoic strata in the Chaoshan depression, northern South China Sea: a new insight from long offset seismic data

• Published in: Journal of oceanology and limnology Vol. 40; no. 4; pp. 1377 - 1387
• Main Authors: Xing, Tao, Zhong, Guangjian, Zhan, Wenhuan, Zhao, Zhongquan, Chen, Xi
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01.07.2022; Springer Nature B.V; University of Chinese Academy of Sciences,Beijing 100049,China%Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China; Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China; Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Innovation Academy of South China Sea Ecology and Environmental Engineering,Chinese Academy of Sciences,Guangzhou 511458,China; Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou 510760,China%Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Innovation Academy of South China Sea Ecology and Environmental Engineering,Chinese Academy of Sciences,Guangzhou 511458,China; Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou 510760,China; University of Chinese Academy of Sciences,Beijing 100049,China
• Subjects: Basins; Data acquisition; Data processing; Drilling; Earth and Environmental Science; Earth Sciences; Geologic depressions; Geology; Hydrocarbons; Imaging techniques; Limnology; Mesozoic; Natural gas exploration; Oceanography; Oil and gas exploration; Oil exploration; Oils & fats; Science; Seismic data; Seismic surveys; Strata; Chaoshan depression; oil and gas exploration; long offset seismic data; exploratory well; Mesozoic strata; integrated interpretation
• ISSN: 2096-5508; 2523-3521
• DOI: 10.1007/s00343-021-1179-6

The Chaoshan depression, a Mesozoic basin in the Dongsha sea area, northern South China Sea, is characterized by well-preserved Mesozoic strata, being good conditions for oil-gas preservation, promising good prospects for oil-gas exploration. However, breakthrough in oil-gas exploration in the Mesozoic strata has not been achieved due to less seismic surveys. New long-offset seismic data were processed that acquired with dense grid with single source and single cable. In addition, the data were processed with 3D imaging method and finer processing was performed to highlight the target strata. Combining the new imaging result and other geological information, we conducted integrated interpretation and proposed an exploratory well A-1-1 for potential hydrocarbon. The result provides a reliable basis for achieving breakthroughs in oil and gas exploration in the Mesozoic strata in the northern South China Sea.