Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-12-29
1990-06-12
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
1663051, 252 8554, E21B 4322
Patent
active
049324730
ABSTRACT:
In a process in which one or more alkyltoluene sulfonate surfactants are applied in solution in a saline aqueous liquid for purposes of enhanced oil recovery, the invention is the improvement which comprises incorporating into the said solution one or more alkylpolysaccharide surfactant in a quantity which is effective for enhancing the solubility of the alkyltoluene sulfonate surfactants in the aqueous solution. The invention is particularly effective for enhancing both the calcium and sodium salt tolerance of aqueous solutions of alkyl toluene sulfonate surfactants.
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D. J. Miller, "Precipitation of Anionic Surfactants by Calcium Ions", Proceedings: 2nd World Surfactants Congress, Paris, May 24-27, 1988, pp. 399-410.
Shell Oil Company
Suchfield George A.
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