Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (1): 13-25.doi: 10.13278/j.cnki.jjuese.20180112

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Site Selection of Scientific Drilling Well CSDP-2 for Marine Mesozoic-Paleozoic Strata in Central Uplift of South Yellow Sea Basin

Wu Zhiqiang1,2, Guo Xingwei1,2, Zhao Weina3, Zhang Xunhua2,4, Qi Jianghao1,2, Zhang Xiaohua1,2,5, Cai Laixing1,2   

  1. 1. Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, Shandong, China;
    2. Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266071, Shandong, China;
    3. College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China;
    4. Nanjing Center, China Geological Survey, Nanjing 210016, China;
    5. College of Marine Geosciences, Ocean University of China, Qingdao 266063, Shandong, China
  • Received:2018-05-16 Published:2019-01-18
  • Supported by:
    Supported by National Natural Science Foundation of China (41210005),AoShan Technological Innovation Projects of National Laboratory for Marine Science and Technology (Qingdao) (2015ASKJ03),National Marine Geological Special Project of China (DD20160147),and National Marine Geology Survey Special Project (121201004000150013)

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Abstract: In 2014,the Continental Scientific Drilling Project (CSDP) decided to adopt the self-developed portable offshore drilling platform "Tanhai 1" to deploy the first exploratory cored hole (Well:CSDP-2) in the central uplift of South Yellow Sea basin. The goal of the project is to probe the Mesozoic-Paleozoic geological structure, oil and gas geological conditions, so as to solve the long-standing stratigraphic problems of marine residual basin in the central uplift of South Yellow Sea,and to provide basic data of the regional geology,sea and land evolution and prospects of marine oil and gas at the same time. Accordingly,we determined the location principle of well CSDP-2 as follows:based on safety and equipment suitability,the water depth of drilling should be no more than 30m, the igneous rock and other special geological bodies should be avoided in the predetermined 2800m drilling depth,and within this depth range,several complete sets of Mesozoic-Paleozoic marine strata should be drilled through. Based on the drilling target and the principle of well location, and under the situation of no drilling data in the central uplift, we designed the technique flow and carried out the research. The seismic reflection horizons were demarcated by means of multi-attribute interpretation of seismic data, the structural maps of reflection horizons were interpreted and compiled, drilling wells were drawn up, the drilling horizons were predicted, and the favorable reservoirs were predicted by seismic reservoir prediction technology. Through the above work, the technical flow and method of drilling well location in non-well exploration area have been formed. The drilling results confirmed the Triassic-Ordovician marine sediments,and found many oil and gas layers.

Key words: central uplift of the South Yellow Sea basin, continental scientific drilling Project(CSDP), Mesozoic-Cenozoic, marine sedimentary sequence

CLC Number: 

  • P736
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