Relationship between the Archie saturation exponent and wettability

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · SPE (Society of Petroleum Engineers) Formation Evaluation; (USA)

DOI:https://doi.org/10.2118/16790-PA· OSTI ID:5497994

Donaldson, E C ^[1]; Siddiqui, T K ^[2]

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1. Oklahoma Univ., Norman, OK (USA)
2. Zakum Development Co.

This paper discusses the calculation of in-situ water saturations from resistivity well logs relies on the saturation exponent of Archie's equation, where n=2 for clean, consolidated, water-wet sandstones. The saturation exponent, however, is a function of the water/oil/rock wettability and was found to range from <2 to 8. The relationship between wettability and the saturation exponent is linear, and the slopes of the lines at low and high temperature are identical for a given sandstone.

• OSTI ID: 5497994
• Journal Information: SPE (Society of Petroleum Engineers) Formation Evaluation; (USA), Journal Name: SPE (Society of Petroleum Engineers) Formation Evaluation; (USA) Vol. 4:3; ISSN 0885-923X; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
&amp; Exploration
04 OIL SHALES AND TAR SANDS
040500* -- Oil Shales &amp; Tar Sands-- Properties &amp; Composition
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics &amp; Mathematical Models-- (1987-1989)
CALCULATION METHODS
EQUATIONS
HIGH TEMPERATURE
OIL SATURATION
RESERVOIR ROCK
ROCKS
SANDSTONES
SATURATION
SEDIMENTARY ROCKS
WATER SATURATION
WELL LOGGING
WETTABILITY