Hydrocarbon Accumulation Modes of Carboniferous in Northeastern Sichuan Basin

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  • 1.Chengdu University of Technology,Chengdu 610059,China;
    2.PetroChina Southwest Oil and Gas Field Company in Northeast Sichuan,Dazhou 635000,China

Received date: 2014-12-01

  Revised date: 2015-01-02

  Online published: 2015-07-10

Abstract

Research on the filling characteristics and reservoir mechanism of Carboniferous oil and gas in northeast Sichuan Basin helps the understanding of the petroleum system.Based on the dynamics of petroleum accumulation,typical hydrocarbon reservoir analysis,fluid source and its flow pattern,combined with fluid inclusion and tracking hydrocarbon migration path techniques,the regularity of hydrocarbon accumulation have been analyzed through sample analysis and numerical simulation experiment.Results suggest that the organic matter from Silurian is the main source rock;the dolomite from Huanglong Formation is the favorable reservoir|the stratum-structure trap in Yinzhi-Yanshan tectonic period provides a gathering space.There are two filling-periods in 210Ma and 170Ma.The tectonic fissure and S/C-C/P unconformity constitute reticular-passage system.Vertical migration is prominent and lateral migration is minor,which shows the accumulation model of “lower-generation and upper storage” adjustment reconstruction in Xishan period.

Cite this article

WU Jing,SHI Jian-nan,ZHENG Rong-cai,WEN Hua-guo,LUO Ren,HU Cheng-fei . Hydrocarbon Accumulation Modes of Carboniferous in Northeastern Sichuan Basin[J]. Natural Gas Geoscience, 2015 , 26(7) : 1310 -1315 . DOI: 10.11764/j.issn.1672-1926.2015.07.1310

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