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Accumulations and resource prospects of natural gas of Cenozoic basins in the South China Sea

Wang Bin1,2，Zhang Qiang1,2，Lü Fu-liang1,2，Yang Tao-tao1,2，Yang Zhi-li1,2，Sun Guo-zhong1,2，Wu Jing-wu1,2   

  1. 1.Hangzhou Institute of Geology，PetroChina，Hangzhou 310023，China；
    2.Hangzhou Institute of Geology Company Limited，Hangzhou 310023，China
  • Received:2018-07-25 Revised:2018-09-25 Online:2018-10-10

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Abstract: The hydrocarbon exploration and development in the South China Sea has developed rapidly since 2000，especially in the deep-water areas (water depth >500m).High temperature and high pressure are generally developed，and the source rock is mainly composed of marine-continental transitional coal-bearing strata，supplemented by terrigenous marine mudstone，and natural gasreservoirs are the major hydrocarbon discoveries.The results of hydrocarbon exploration are inconsistent withthose for the resource evaluation in the South China Sea.Therefore，it is necessary to carry out natural gas resource evaluation systematically tounderstand the potential of natural gas resources scientifically in the South China Sea.On the basis of summarizing the new progress of hydrocarbon exploration in the South China Sea and the new understanding of petroleum geology，this paper summarizes four different types of natural gas accumulation models that are related to tectonic，bioreef strata，deep-water sedimentary lithology and bedrock buried hill lithology.We consider 15 major deep-water sedimentary basins as the target for resource evaluation.We use the resource evaluation method which is based on multi-parameter analogy method and supplemented by generative and statistical method.Three analog scale areas such as Wanan，Brunei Sabah and Pearl River Mouth Basin are established，and they represent three different types of sedimentary basins (trap，strike and foreland-basins).We also obtain the key parameters such as hydrocarbon accumulation conditions and abundance of natural gas resources，and finally use the Delphi method to predict the natural gas geological resources of 15 major sedimentary basins (31.85 trillion cubic meters).Finally，we define the geographical，planar and spatial distribution and exploration potential of the natural gas resources in the South China Sea.

Key words: South China Sea, Resource evaluation method, Natural gas exploration potential

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  • Cite this article

    Wang Bin, Zhang Qiang, Lü Fu-liang, Yang Tao-tao, Yang Zhi-li, Sun Guo-zhong, Wu Jing-wu, . Accumulations and resource prospects of natural gas of Cenozoic basins in the South China Sea[J].Natural Gas Geoscience, 2018, 29(10): 1542-1552.

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