Method for thermal stimulation of a subterranean reservoir...

B - Operations – Transporting – 01 – F

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B01F 3/04 (2006.01) E21B 36/00 (2006.01) E21B 43/24 (2006.01)

Patent

CA 1292674

METHOD FOR THERMAL STIMULATION OF A SUBTERRANEAN RESERVOIR AND APPARATUS THEREFOR (D#78,828-F) ABSTRACT A system and the equipment for economically enhancing recovery of hydrocarbon fluids from a subterranean reservoir in which a plurality of production and injection wells are formed. High grade steam from a common source is mixed with relatively cold water at each injection well to be treated. To avoid, or substantially reduce condensation shock in the water/steam mixer, the high velocity cold water is initially heated in a steam compartment with minimal contact between the two fluids. Thereafter, the steam and the water are introduced to a heat exchange chamber in which the temperature of the water is raised prior to the two streams being merged for injection into a well as either heated water or as low quality steam.

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