The classification and evaluation criterion of low permeability reservoir : An example from Ordos Basin
Online published: 2007-09-15
Based on the mercury penetration analysis of more than 300 samples and analysis result s of more than 260 casts and more than 100 image pores , and referred to the classification criterion about clastic reservoir , especially low permeability reservoir , the low permeability sandstone reservoirs in Ordos Basin were divided into four types and four sub-types. The four types include low permeability reservoir ( I) , extra-low permeability reservoir ( II) , super-low permeability reservoir ( III) and tight reservoir ( IV) . Among them extra-low permeability reservoir and super-low permeability reservoir are the main reservoir types of Triassic Yanchang Formation in Ordos Basin. According to t he characteristics of t he pore structure and petrophysics and the classification criterion of the reservoir thickness , they are divided into two
sub-types respectively.
SHUAI Yuanyuan , WANG Xiaodong , SUN Ting , ZHOU Congcong . The classification and evaluation criterion of low permeability reservoir : An example from Ordos Basin[J]. Lithologic Reservoirs, 2007 , 19(3) : 28 -31,53 . DOI: 10.3969/j.issn.1673-8926.2007.03.004
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