Methods for Determination of Cutoff Values of Reservoir Porosity and Permeability

• 责任者：Wang Juan (State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Liu Xuegang
• 刊名：Xinjiang Petroleum Geology
• 出版年：2010
• 卷期：31(2)
• 关键词：储集层 ; reservoirs ; 孔隙度 ; porosity ; 渗透率 ; permeability ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.203-204, 207
• 图表：5 illus., 1 table, 4 refs.
• 分类号：1003
• issnNo：ISSN1001-3873
• isbnNo：CN65-1107/TE

This paper presents four methods of empirical statistical analysis, throat radius cut off, relative permeability curve and gas test for effective determination of reservoir porosity and permeability cutoff values for the purpose of oil-gas reservoir identification and reserves estimation. These methods are applied to determination of cutoffs of porosity and permeability of the He-8 Member, Shihezi Formation in Wellblock-8 in a gas field in Ordos Basin, showing that the porosity cutoff value is 6.25%, the permeability cutoff value is 0.1×10^-3 μm².