Effects of Diagenetic Facies on Rock Electrical Properties in Tight Gas Sandstones
Liu Hongping
Luo Yang
Zhao Yanchao
Chen Zhaoyou
Mu Guodong
Abstract：The research about tight gas sandstones is one the forefront research.In order to characterize rock electrical properties in tight gas sandstones of different diagenetic facies in Taiyuan Formation, Dingbei Area, we conducted casting thin sections, porosity and permeability, micro-CT and high pressure mercury intrusion/withdrawal method on these sandstones.Four diagenetic facies are observed in the area, namely, quartz cementation diagenetic facies, kaolinite partially filled diagenetic facies, unstable components resolution diagenetic facies and tight compaction diagenetic facies.The formation factor shows very good relationship with porosity regardless of diagenetic facies, hence a and m are set constant at 15.88 and 0.82 for all the diagenetic facies.Saturation exponent (n) are variable among the different diagenetic facies, 2.30, 1.51, 2.03 and 4.04 are selected repectively for the n value of the four diagenetic facies.Examples show that the chosen electrical parameters have good agreements with the gas production test, much better than the result of chosen the theoretical n value of 2.
Keywords：tight sandstonediagenetic faciesrock electrical propertiesloggingpetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 652-660 )