Wells – Processes – Distinct – separate injection and producing wells
Patent
1987-12-02
1988-11-01
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166273, 252 8554, 530502, E21B 4322
Patent
active
047812516
ABSTRACT:
The invention is a method of recovering hydrocarbons with a surfactant flooding system, wherein the surfactant slug comprises about 0.1% to about 10% by weight of an alkylphenol lignin surfactant. The alkylphenol lignin surfactant is produced by reacting an alkylphenol having about 6 to about 15 carbon atoms in the alkyl chain with formaldehyde in basic solution at a temperature of about 50.degree. to about 120.degree. C. for about 15 minutes to about 3 hours to form a first reaction product. The first reaction product is then reacted with a kraft lignin in solution at a temperature of about 100.degree. to about 160.degree. C. for about 30 minutes to about 5 hours to form an alkylphenol lignin reaction product. Finally, the alkylphenol lignin reaction product is made more water soluble by subjecting the alkylphenol lignin reaction product to a reaction selected from the group consisting of sulfonation, sulfation, alkoxysulfonation, alkoxysulfation, and alkoxylation to produce the alkylphenol lignin surfactant.
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DeBons Francis E.
Naae Douglas G.
Delhommer Harold J.
Park Jack H.
Priem Kenneth R.
Suchfield George A.
Texaco Inc.
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