Affiliation:
1. New Mexico Petroleum Recovery Research Center
Abstract
ABSTRACT
Precipitates that form as the result of interactions between an asphaltic crude oil and low molecular weight paraffin solvents can remain suspended in the oil phase, rather than being adsorbed onto solid surfaces. Adsorption may be restricted to surfaces made oil-wet by oil/brine/rock interactions prior to precipitation. Visual observations show that the wateirflood displacement mechanisms after asphaltene precipitation are similar to the mechanisms of displacement of the unprecipitated crude oil. Trends of wettability alteration in a Berea sandstone core, as measured by the Amott method, are shown to be similar, whether the test is performed with the crude oil or with a low-molecular weight paraffin oil with which the crude oil may be incompatible.
Publisher
Society of Petroleum Engineers (SPE)
Cited by
19 articles.
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