Quantitative Analysis of Diagenesis and Diagenetic Facies of Reservoir of Shan32 Member in the North of Zizhou Gasfield,Ordos Basin

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  • 1.School of Earth Sciences and Engineering,Xi′an Shiyou University,Xi′an 710065,China;2.Key Laboratory
    of Shaanxi Province for Oil and Gas Accumulation Geology,Xi′an Shiyou University,Xi′an 710065,China;
    3.State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,Xi′an 710069,China;
    4.Research Institute of Yanchang Petroleum (Group) Co.Ltd.,Xi′an 710075,China;
    5.The Exploration Department of Changqing Oilfield Company,PetroChina,Xi′an 710021,China

Received date: 2015-03-05

  Revised date: 2015-09-22

  Online published: 2015-11-10

Abstract

Analytical tests were used in this study such as core observation,casting thin section observation,SEM,high pressure Hg injection and X-ray diffractometer.Based on study of lithology characteristics,physical properties and pore structure on Shan32 member of Shanxi Formation in the north of Zizhou Gasfield in the Ordos Basin,the diagenesis was analyzed qualitatively and quantitatively by multi-parameter.Diagenetic evolution sequence,determined diagenetic stage and porosity evolution were restored.The diagenetic facies of reservoir were divided according to the results of diagenesis analysis,physical property and characteristics of capillary pressure curve.The plane distribution characteristics of diagenetic facies were studied.This research shows that Shan32 reservoir of the study area has experienced four stages of diagenesis which respectively are compaction,cementation,metasomatism and dissolution.It is now in the phase B of middle diagenetic stage,with parts of the late diagenetic stage.The diagenetic facies of reservoir are divided into six types.The most favorable facies distribute in central of underwater distributary channel in the southwest of the study area,which are potato-like or island shaped.These areas are the preferred for gas exploration and development of Shan32 Member in the north of Zizhou Gasfield.

Cite this article

MA Yao,LI Wen-hou,WANG Ruo-gu,ZHANG Hui-ruo . Quantitative Analysis of Diagenesis and Diagenetic Facies of Reservoir of Shan32 Member in the North of Zizhou Gasfield,Ordos Basin[J]. Natural Gas Geoscience, 2015 , 26(11) : 2039 -2052 . DOI: 10.11764/j.issn.1672-1926.2015.11.2039

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