E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/31
E21B 43/22 (2006.01) C09K 8/584 (2006.01) C09K 8/60 (2006.01)
Patent
CA 1132452
ABSTRACT OF THE DISCLOSURE A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of lignosulfonate salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the lignosulfonates into the formation through the injection well mixed with either a polymer or surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well. The surfactant solution comprises a mixture of petroleum sulfonate and an alkyl benzene alkoxylated sulfonate. In another embodiment, the surfactant solution comprises sulfonated alkoxylated alkyl surfactants and/or alkyl benzene alkoxylated sulfonates.
330458
Gowling Lafleur Henderson Llp
Texaco Development Corporation
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