Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-01-20
1989-06-06
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166273, 166274, 166275, 166309, 252 8554, E21B 4322
Patent
active
048362816
ABSTRACT:
The invention concerns an enhanced oil recovery process improving the gas sweeping of an oil formation reservoir comprising at least one injection, through at least one injection well, either simultaneously or separately, of a plug of solution, preferably aqueous, of at least one surfactant and of a gas and/or steam plug (or "slug"), so as to form a foam.
At least a portion of said reservoir is swept by said foam and the hydrocarbons are recovered through at least one producing well. The surfactant complies with the general formula R.sub.F --Y--X wherein R.sub.F is a perfluoric carbon radical, Y is a single bond or a divalent carbon radical containing at least one oxygen, sulfur and/or nitrogen atom, and X is a hydrophilic group.
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Demay Claude
Robin Michel
Atochem
Institut Francais du Pe'trole
Suchfield George A.
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