Discussions on flow unit quantitative identification methodology in tight sandstone reservoirs

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  • 1.College of Geosciences,China University of Petroleum,Beijing 102249,China;
    2.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;
    3.College of Geosciences and Technology,China University of Petroleum,Qingdao 266580,China;
    4.Institute of Exploration and Development SINOPEC Shanghai Offshore Oil and Gas Company,Shanghai 200120,China

Received date: 2015-06-30

  Revised date: 2015-09-29

  Online published: 2019-09-20

Abstract

Popular flow zone index FZI is not suitable for strong heterogeneity and complex pore throat structure reservoir flow units identification of tight sandstone reservoir.Taking Daniudi tight gas reservoir as an example,introducing the cementation exponent m which reflects the rock pore structure into improved Kozeny-Carman equation to calculate FZIm,the recognition results were satisfying.When m is not constant of 1,but a variable,it has bigger influence on the pore structure and seepage characteristics.If m=1,FZIm equates FZI,FZI is only special case of FZIm.Research suggests that FZIm is not only suitable for conventional homogeneous sandstone,but also for the recognition of tight sandstone reservoir flow unit.For sand sample without cementation exponent,using the method that introduced in this paper to predict m,we could get FZIm for flow unit identification.

Cite this article

Chen Wen-hao, Wang Zhi-zhang, Pan Lu, Li Han-lin, Hou Jia-gen . Discussions on flow unit quantitative identification methodology in tight sandstone reservoirs[J]. Natural Gas Geoscience, 2016 , 27(5) : 844 -850 . DOI: 10.11764/j.issn.1672-1926.2016.05.0844

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