Surfactant Selection With the Three-Parameter Diagram

Abstract
Summary: A procedure to select surfactants for microemulsion flooding is developed that requires only nominal phase-behavior information, acquired in experiments with pure oils and NaCl brines, provided that the field brine composition, crude oil molar volume, and crude oil hydrogen/carbon ratio are known. It is shown that, for alkylaryl sulfonates, microemulsion phase behavior correlates with ion size and charge rather than with ionic strength alone.

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