Steam-assisted gravity drainage process

Details Steam-assisted gravity drainage process Steam-assisted gravity drainage process

E - Fixed Constructions

21

B

E21B 43/24 (2006.01)

Patent

CA 2330094

Following second phase steam assisted gravity drainage operation using a co-operating pair of steam injection and fluid production wells, steam injection is terminated while flowing fluid production is continued, to draw down the reservoir pressure and flash steam in situ. Then a downhole pump is actuated to produce reservoir fluid and further reduce the reservoir pressure; thereby generating additional steam in situ. As a result of these steps, an additional recovery of oil is realized, using residual heat remaining in the reservoir at the end of steam injection and incremental steam generated in situ by pressure reduction obtained by pumping.

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