Miscible displacement oil recovery method

Details Miscible displacement oil recovery method Miscible displacement oil recovery method

E - Fixed Constructions

21

B

166/31

E21B 43/22 (2006.01)

Patent

CA 1145247

MISCIBLE DISPLACEMENT OIL RECOVERY METHOD D#73, 635-F ABSTRACT OF THE DISCLOSURE An improved miscible displacement oil recovery process, and particularly a vertical downward gas driven miscible blanket oil recovery process is disclosed. Reduction of temperature in the portion of the reservoir where miscible displacement is occurring reduces the pressure required to attain miscibility with a specified solvent-dry gas injection mixture; or at constant pressure, reduces the amount of solvent required to be injected to achieve a condition of miscibility. Cooling is achieved by chilling the solvent prior to injecting it into the reservoir, or cooling the high pressure dry gas injected into the reservoir, or both. -I-

367994

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