Lithologic Reservoirs ›› 2007, Vol. 19 ›› Issue (1): 32-38.doi: 10.3969/j.issn.1673-8926.2007.01.006

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Provenance analysis of Chang 6 oil-bearing formation of Baibao-Huachi region in Ordos Basin

ZHENG Rongcai1 , WANG Changyong1 , Li Hong2 , LEI Guangming3 , XIE Chunhong3   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Ex ploration, Chengdu University of Technology;
    2. Chongqing Gas Field of Southwest Oil and Gas Company , PetroChina;
    3. Geologic Exploration and Development Research Institute of Sichuan Petroleum Administration , CNPC
  • Online:2007-03-15 Published:2007-03-15

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Abstract:

Provenance analysis mainly includes comparison of debris compositions, heavy mineral assemblages,sedimentary facies, geochemical analysis,cathodoluminescence image of quartz and so on.The research area is relatively large and it is influenced by multiple sediment supplies,so multiple analysis methods are adopted to define the characteristics of source rocks and source direction of Chang 6 oilbearing formation in Baibao-Huachi region.Furthermore mainly by contrast analysis between debris compositions and light/heavy mineral assemblage and quartz cathodoluminescence analysis,two material source directions existing in the research area a reproved.The main material source direction is located in the north and northeast of the research area,and the source rocks are ancient hybridization rocks of granite and low-middle/middle rank metamorphic rocks that come from ancientland of Yin Mountain in north Ordos Basin; the secondary material source direction is in the southwest,and the source rock is located in Lower Palaeozoic strata which come from Kongtong Mountain in southwest of Ordos Basin.

Key words: the formation temperature-pressure systems, oil and gas accumulation, Moliqing Sag

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