Lignosulfonates as additives in oil recovery processes involving

Details Lignosulfonates as additives in oil recovery processes involving Lignosulfonates as additives in oil recovery processes involving

1978-12-11

1980-11-25

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, E21B 4322

Patent

active

042352908

ABSTRACT:
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.

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