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Thin films, asphaltenes, and reservoir wettability

Description: Reservoir wettability impacts the success of oil recovery by waterflooding and other methods. To understand wettability and its alteration, thin-film forces in solid-aqueous-oil systems must be elucidated. Upon rupture of thick aqueous films separating the oil and rock phases, asphaltene components in the crude oil adsorb irreversibly on the solid surface, changing it from water-wet to oil-wet. Conditions of wettability alteration can be found by performing adhesion tests, in which an oil dropl… more
Date: April 1, 1993
Creator: Kaminsky, R.; Bergeron, V. & Radke, C. J.
Partner: UNT Libraries Government Documents Department
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Water films, asphaltenes, and wettability alteration

Description: We present a transport model for asphaltene diffusion from an oil/water interface through a water film followed by adsorption at a solid/water interface. Using a Langmuir adsorption isotherm, the effect of asphaltene aqueous solubility and adsorption constant K on equilibration time are established. For K greater than 1 nm and asphaltene solubilities down to 0.1 ppb, adsorption equilibrium, taken to be 1 mg/m{sup 2}, occurs within a few hours. Negligible asphaltene solubility does not explain w… more
Date: June 1, 1998
Creator: Kaminsky, R. & Radke, C.J.
Partner: UNT Libraries Government Documents Department
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