Process for the enhanced oil recovery of underground mineral...

Details Process for the enhanced oil recovery of underground mineral... Process for the enhanced oil recovery of underground mineral...

E - Fixed Constructions

21

B

166/32, 31/8

E21B 43/24 (2006.01) C09K 8/592 (2006.01) C09K 8/86 (2006.01) E21B 43/25 (2006.01)

Patent

CA 1255489

Abstract A process for the enhanced oil recovery of under- ground mineral oil deposits, in which one or more sub- stances which are scarcely water- and oil-soluble at de- posit temperature but are well soluble or volatile in the hot flooding medium and whose melting point lies above the deposit temperature, are added to the flooding medium hot water and/or water vapor. They move with the hot flooding medium through the deposit and precipitate as a solid pre- ferably at that part of the temperature front which is advancing fastest, thereby constricting the pores of the deposit temporarily and reversibly, until the solid is dissolved or evaporated again by the hot flooding medium flowing on after, which has the overall effect of an areal and vertical equalization of the temperature front. O.Z.757 9.2.1984

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