Method of controlling scale in oil recovery operations

Details Method of controlling scale in oil recovery operations Method of controlling scale in oil recovery operations

E - Fixed Constructions

21

B

166/31

E21B 43/24 (2006.01) C09K 8/524 (2006.01) C09K 8/74 (2006.01) E21B 41/02 (2006.01) E21B 43/28 (2006.01)

Patent

CA 1134261

ABSTRACT Disclosed is a method of producing highly viscous minerals from a subterranean formation by injection of an acidic, thermal vapor stream without substantial scale build- up in downstream piping, pumps and well bore. The process comprises heating the formation by injection of heat, preferably in the form of a thermal vapor stream composed of combustion gases and steam and injecting an acidic compound simultaneously with the thermal vapor stream into the formation at a tempera- ture above the dew point of the thermal vapor stream. The acidic, thermal vapor stream increases the solubility of metal ions in connate water and thus reduces scaling in the downstream equipment during the production of viscous hydrocarbons.

347040

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