| 摘要 |
<p>A METHOD OF IMPROVING CONFORMANCE IN STEAM FLOODS WITH CARBOXYLATE STEAM FOAMING AGENTS (D#78,530-F) The disclosed invention is a group of steam foaming agents for injection with steam and a non-condensable gas to decrease permeability in steam swept zones and increase oil recovery. The foaming agents have the general formula: RO(R'O)nR"CO2M where R is an alkyl radical, branched or linear, having from about 8 to about 24 carbon atoms in the alkyl chain, R' is ethylene, propylene or a mixture of ethylene and propylene, n has an average value of about 3 to about 11, R'' is methylene or ethylene, and M is an alkali metal or ammonium ion. pg:EX8F</p> |
