Electrical conductivity of rock-solution systems under ambient conditions: Pictured Cliffs sandstone in tap water

Technical Report · Tue Feb 17 04:00:00 EST 1976

OSTI ID:7276664

Weed, H C; Piwinskii, A J

As part of a program to explore the range of applicability of Archie's Law, the electrical conductivity (sigma) of cylindrical, 25.4-mm-diameter cores cut from Pictured Cliffs sandstone (porosity range 3.8 percent to 4.9 percent) was measured at a frequency of 1 kHz under ambient conditions after immersion in tap water. The sigma of the solutions was also measured. Formation factors (F) and the sigma of rock specimens displayed time-dependent behavior for up to 4500 h. The time required for sigma to reach maximum values was found to increase with the porosity of the rock sample. The observed time-dependence of F was influenced by the kinetics of ion transport between the Pictured Cliffs sandstone and the aqueous pore fluid. Soxhlet extraction of the sample before immersion lowered the magnitude of increase in F as a function of time, but it did not guarantee time-independent behavior.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7276664
• Report Number(s): UCRL-52005
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
58 GEOSCIENCES
580200 -- Geophysics-- (-1989)
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FREQUENCY RANGE
HYDROGEN COMPOUNDS
KHZ RANGE
KHZ RANGE 01-100
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POROSITY
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
TIME DEPENDENCE
WATER