Alkoxylated asphalts as sacrificial agents in oil recovery...

Details Alkoxylated asphalts as sacrificial agents in oil recovery... Alkoxylated asphalts as sacrificial agents in oil recovery...

E - Fixed Constructions

21

B

31/16, 166/31

E21B 43/20 (2006.01) C09K 8/88 (2006.01)

Patent

CA 1055841

ABSTRACT OF THE DISCLOSURE A process for producing petroleum from subter- ranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an in- jection well to a production well. The process involves injecting into the formation via the injection well an aqueous solution of ethoxylated asphalts as a sacrificial agent to inhibit the deposition of surfactant and/or poly- mer on the reservoir matrix. Normally the process would be carried out by first injecting the ethoxylated asphalts into the formation through the injection well and following them with either a polymer or a surfactant solution. The polymer and/or surfactant would then be followed by a drive fluid such as water to push the chemicals to the production well.

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