Discussion on the Variation Coefficient Calculation Method of Reservoir Permeability
详细信息
- 责任者：Ma Guanghua (Research Institute of Exploration and Development ; Jidong Oilfield Company ; PetroChina ; Tangshan 063004 ; China) ; Wei Wendong
- 刊名：Contributions to Geology and Mineral Resources Research
- 出版年：2013
- 卷期：28(2)
- 关键词：储层性质 ; reservoir properties ; 渗透率 ; permeability
- 页码：p.256-262
- 图表：illus., 2 tables, 8 refs.
- 分类号：1003
- issnNo：ISSN1001-1412
- isbnNo：CN12-1131/P
摘要
Variation coefficient,range and dash coefficient of reservoir permeability is the quantitative characterization of heterogeneity of the permeability.This paper discusses the variation coefficient calculation method.The variation coefficient calculation method is related to data distribution type and the proper variation coefficient calculation method is selected according to characteristics of data distribution.Lorenz coefficient is independent with data distribution type and is bounded by and distributed in the range of 0 to 1.Especially under condition of logarithmic normal distribution,Lorenz curve and Gini coefficient are completely determined by the standard deviation σ.Lorenz curve,Gini coefficient and σ have one-to-one correspondence.The Lorenz coefficient can be used in quantitative evaluation of reservoir heterogeneity.
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