Estimation of Water Saturation in Shale Formation Using In Situ Multifrequency Dielectric Permittivity

Table 1

Dielectric constant ranges of common rocks, minerals, and fluids.

Rocks, minerals, and fluids	Dielectric constants
Anhydrite	6.3
Dolomite	6.8
Barite	7
Sulphur	3.6
Biotite	4.7
Gneiss	8.5
Limestone	7.5
Fluorite	6.2
Calcite	7.8
Apatite	7.411.7
Plagioclase feldspar	5.4
Gypsum	5
Quartz	4.2 5
Pyrite	10.9
Sandstone (dry to moist)	4.7 12
Clay (dry to moist)	7 43
Petroleum	2.07 2.14
Water (20C)	80.36