Paleogene Sequence Stratigraphy and Source-Reservoi-Cap Rock Assemblage in Baiju Sag

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  • 1.Institute of Resources and Environment,Southwest Petroleum University,Chengdu 610500,China;
    2.Zhongyuan Oil Field Branch Company of SINOPEC,Puyang 457001,China;
    3.Zhejiang Oilfield Company of PetroChina,Hangzhou 310023,China

Received date: 2010-05-05

  Revised date: 2011-05-31

  Online published: 2011-08-10

Abstract

Based on drilling core,bore well,well logs and seismic data,we use the calssical Vail theory of sequence stratigraphy to identify six sequence boundaries in Paleogene Baiju sag,which is divided into one first-order sequence,two second\|order sequences,and five three-order sequences.The third-order sequences of SQ1-SQ4 and SQ5 are corresponding to the basin's subsiding-fault depressing stage and strong fault-depressing stage.We use the isochronous correlation to establish the Paleogene sequence stratigraphic framework in the Baiju sag,and discuss the relationship between source-reservoir-cap rock assemblages and third-order sequences.The low water level and later high water level system fields are the favorable place of reservoir development.The transgressive and early high water lelve system fields are the profitable place of source and cap rock formation.Three sets of source-reservoir-cap assemblages are formed among these fields,and the lower assemblage is the best one in Paleogene in the Baiju sag.

Cite this article

WEI Xiang-Feng, ZHANG Ting-Shan, WEI Xiang-Hua, LIANG Xin, YAO Qiu-Chang . Paleogene Sequence Stratigraphy and Source-Reservoi-Cap Rock Assemblage in Baiju Sag[J]. Natural Gas Geoscience, 2011 , 22(4) : 674 -683 . DOI: 10.11764/j.issn.1672-1926.2011.04.674

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