New technology customizes surfactant-spacer fluids

A new technique used to evaluate apparent wettability has allowed Chevron Inc. to custom-design surfactant and spacer packages with 50% savings on costs and surfactant volumes.To date, the technique, developed in an effort to remove subjectivity from the wettability evaluation process, has been successfully applied on several cement jobs in the Gulf of Mexico, South Texas, and Canada.This conclusion of a two-part series (OGJ, Oct. 4, 1999, p. 71), examines diesel-based muds and explains how an innovative wettability-evaluation technology can provide experienced personnel with a valuable research tool, while allowing technicians in any moderately equipped field laboratory to customize surf...

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