Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (4): 55-63.doi: 10.3969/j.issn.1673-8926.2017.04.007

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Fine description method of dynamic provenance and its application:a case from Yanan Sag,Qiongdongnan Basin

WU Aijun1, XU Jianyong1, TENG Binbin2, XIAO Lingli1, KANG Bo1, LI Fanyi1, YIN Binhao1   

  1. 1. CNOOC Research Institute, Beijing 100028, China;
    2. Research Institute of Petroleum Exploration & Development, Sinopec, Beijing 100083, China
  • Received:2016-10-08 Revised:2016-12-14 Online:2017-07-21 Published:2017-07-21

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Abstract: With the development of lithologic trap exploration,the conventional provenance analysis method cannot meet the demand of oil and gas exploration. Based on the concept of dynamic provenance,a systematic method of fine description of dynamic provenance was established, which enriches the research methods of provenance analysis. Based on the sequence boundary recognition and systems tract division,combined with the constrain of compaction correction and reestablishing of paleo-water depth,this method uses quantitative back-striping technique to restore the paleogeomorphology at early age of different systems tracts. The development scale of clastic reservoir was determined by characterizing the provenance of the initial sediments in each systems tract, so as to predict the development position of the reservoir. This method was applied to lithologic trap research in Yanan Sag of Qiongdongnan Basin. The result shows that there is a short-term but comparatively large-scale provenance region in LST of Lingshui Formation(E3l1), which could provide abundant sandbodies to form a large lithologic trap associated with fan delta. This lithologic trap has excellent hydrocarbon accumulation conditions,and it might be a break-through of lithologic reservoir exploration in Yanan Sag.

Key words: stratigraphic-lithologic reservoirs, distribution characteristics, controlling factors, Paleogene, Jizhong Depression

CLC Number: 

  • TE122.2
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