Influence of wettability on two-and four-electrode resistivity measurements on Berea sandstone plugs

Journal Article · Sun Dec 01 04:00:00 EST 1991 · SPE Formation Evaluation (Society of Petroleum Engineers); (United States)

OSTI ID:5606330

Wie, J Z; Lile, O B ^[1]

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1. Univ. of Trondheim (NO)

Two and four-electrode resistivity measurements were conducted on water- and oil-well Berea sandstone plugs for different saturation directions with a steady-state flooding procedure. The data from nine plugs indicated that reliable resistance values can be obtained on water-wet cores with both two-and four-electrode methods. On oil-wet cores, however, two-electrode measurements yielded higher resistance values that those from the four-electrode method because of end effects on contact resistance, especially for low water saturations. In addition, the saturation history substantially influenced the resistivity measurements of oil-wet cores. In this paper the four-electrode technique is better for oil-wet core resistivity measurements because it ensures that correct Archie saturation exponents are derived.

• OSTI ID: 5606330
• Journal Information: SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 6:4; ISSN 0885-923X; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
DRILL CORES
ELECTRICAL SURVEYS
ELECTRODES
EVALUATION
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
OIL FIELDS
OIL SATURATION
OIL WELLS
PETROLEUM DEPOSITS
PLANNING
RESISTIVITY SURVEYS
RESOURCES
ROCKS
SANDSTONES
SATURATION
SEDIMENTARY ROCKS
SURVEYS
WATER SATURATION
WELLS
WETTABILITY