Refined Evaluating Thickness of Extra-Low Permeability Reservoir Using Lithophase Classification—Take the Chang 6 Extra-Low Permeability Reservoir of the Yanhewan Area as an Example

• 责任者：Wang Guicheng (Xi’an Shiyou University ; Xi’an 710065 ; China) ; Song Ziqi
• 刊名：Acta Geologica Sinica
• 出版年：2010
• 卷期：84(2)
• 关键词：低渗透储集层 ; low permeability reservoirs ; 陕西 ; Shaanxi Province
• 页码：p.286-291
• 图表：7 illus., 2 tables, 22 refs.
• 分类号：1003
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

This study defined the effective thickness of extra-low permeability reservoirs using lithophase classification, due to the fact that extra-low permeability reservoirs in the middle section of the Shanbei slope are affected by depositional settings, reservoir performance, diagenesis and structures, reservoir performance and infiltrating textural difference varies greatly, and log responses were complicated. Taking the Chang 6 as an example, this study analyzed and extracted the denotive parameters of classification for lithophase of extra-low permeability reservoir, and this solved heterogeneous, non-linear problems by converting them into relatively homogeneous, linear ones, which improves the precision and effect of reservoir effective thickness using well logging interpretation.