This paper describes a technique for inferring formation wettability from measurement on crude oil/brine pairs. This dynamic Wilhelmy plate technique yields a quantitative measure of wettability in a form which is directly comparable to other forces in the reservoir. Exposure to air affects the measured wettability of crude oil, and a device is described for avoiding contamination.

Keywords:
anderson, reservoir, upstream oil & gas, interface, oil brine interface, anaerobic vessel, crude oil brine glass, wettability, enhanced recovery, adhesion tension
Subjects:
Improved and Enhanced Recovery, Waterflooding
Copyright 1988, Society of Petroleum Engineers
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