Oil & Gas Geology ›› 2004, Vol. 25 ›› Issue (1): 62-69.doi: 10.11743/ogg20040112

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Types and features of source-reservoir-cap rock combinations in Paleozoic sequence in southern China

Chen Hongde1,2, Qin Jianxiong1,2, Tian Jingchun1,2, Zhou Yan1,2   

  1. 1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation;
    2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan
  • Received:2003-11-25 Online:2004-02-25 Published:2012-01-16

Abstract:

In view of status of petroleum exploration in marine carbonates in southern China,a dynamic and practical classification scheme is presented for source-reservoir-cap rock combinations based on sequence stratigraphy study. It divides, for the first time, the source-reservoir-cap rock combinations in this region into 5 types,including boundary type, low water type, transgression type, high water type and composite type.Various types of combinations have different sedimentary and geological features and different petroleum geological significances. The boundary type is characterized by poor effectiveness in timing; the low water type is characterized by its wide distribution,small reservoir bodies and optimum migration conditions; the transgression type has strong sealing capability with small reservoir bodies; the high water type is rich in petroleum and is characterized by its largest reservoir bodies,widest distribution and regional and even globel comparability; while the composite type is characterized by its large, wide and stable distribution and hydrocarbon accumulations of multiple sources,multiple stages and multiple geneses.

Key words: petroleum accumulation, Paleozoic, sequence stratigraphy, southern China

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