METHOD OF IMPROVING CONFORMANCE IN STEAM FLOODS WITH CARBOXYLATE STEAM FOAMING AGENTS

摘要

A METHOD OF IMPROVING CONFORMANCE IN STEAMFLOODS WITH CARBOXYLATE STEAM FOAMING AGENTS(D#78,530-F)ABSTRACTThe disclosed invention is a group of steam foamingagents for injection with steam and a non-condensable gas todecrease permeability in steam swept zones and increase oilrecovery. The foaming agents have the general formula:RO(R'O)nR"CO2Mwhere R is an alkyl radical, branched or linear, having fromabout 8 to about 24 carbon atoms in the alkyl chain, R' isethylene, propylene or a mixture of ethylene and propylene, n hasan average value of about 3 to about 11, R'' is methylene orethylene, and M is an alkali metal or ammonium ion.pg:EX8F