Surfactant induced wettability alteration

It may also be beneficial to alter the wettability (see Section 3.5.3) of the reservoir rock, particularly in order to shift oil-wetting regions towards neutral wetting, which is probably about the optimum for improved oil recovery [158]. Figure 3.23 (see Section 3.5.3) shows how surfactant adsorption can alter wettability, but not always in a simple manner. Such surfactant-induced wettability alteration might be considered for predominantly oil-wetting reservoirs such as chalk reservoirs in the North Sea. 

Spinier, E.A. Baldwin, B.A. Surfactant Induced Wettability Alteration in Porous Media in Surfactants, Fundamentals and Applications in the Petroleum Industry, Schramm, L.L. (Ed.), Cambridge University Press Cambridge, UK, 2000, pp. 159-202. 

Surfactant Induced Wettability Alteration in Porous Media... 

Spinler Baldwin Surfactant Induced Wettability Alteration... 

This section briefly describes the more customary measurement methods that can be used to study surfactant induced wettability alteration of porous and non-porous media. The information is given to make the reader aware of the significant differences between the various wettability measurement methods and the various quantities that they measure. The reader is referred to the references for more detailed information about any given method. Anderson [12] has produced a good literature review of many of the various wettability methods. 

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