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《Marine Geology & Quaternary Geology》 2018-05
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Analysis and resource evaluation of hydrocarbon plays in the west Natuna Basin,southwestern part of the South China Sea

NI Shiqi;WANG Zhixin;SONG Jiye;PANG Lin'an;Beijing Research Institute of Uranium Geology;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum;Basin &Reservoir Research Center,China University of Petroleum;CNOOC Research Institute;  
Based on the latest exploration data,through study of basin evolution and analysis of hydrocarbon accumulation,the petroleum systems and hydrocarbon plays of the west Natuna Basin are identified,described and analyzed in this paper.The purpose of the endeavor is to assess the petroleum resources potential and geological risks so as to optimize the favorable exploration targets.The results suggest that the west Natuna Basin can be subdivided into4 petroleum systems and9 plays,of which6 have exploration potential,and the undiscovered petroleum resources of the 6 plays are estimated as 890.16 MMboe in total by the Monte Carlo method and resource abundance analogy method.The undiscovered petroleum resources of the Penyu Formation play in the Penyu Sub-basin are up to 587.22 MMboe,accounting for 66% of the total of the basin.Upon the analysis of hydrocarbon accumulation factors using double factors method for resources-geological risks assessment,identified are plays including one classⅠ play,one classⅡ play,two classeⅢ plays and two classⅣ plays.Favorable exploration areas can be further optimized with the‘plays area overlaying'method.The stratigraphic-structural play in Arang Formation in the northwestern part of the Anambas Graben is finally selected as the most favorable area of class I.The progres-sive research method of resource assessment and division of hydrocarbon plays can guide the petroleum resources assessment in intracratonic rift basins of Southeast Asia.
【Fund】: 中核集团集中研发项目“伊利盆地南缘东段砂岩型铀矿定位预测与靶区优选”(地LTD1601-4);; 国土资源部油气资源战略中心“全国重点地区能源数据库建设项目”(1212011568801)
【CateGory Index】: P618.13
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