Process for sequentially applying sagd to adjacent sections...

Details Process for sequentially applying sagd to adjacent sections... Process for sequentially applying sagd to adjacent sections...

E - Fixed Constructions

21

B

E21B 43/24 (2006.01)

Patent

CA 2251157

Steam assisted gravity drainage ("SAGD") is practised in a first section of a reservoir containing heavy oil. When production becomes uneconomic, steam injection into the first section is terminated. Non-condensible gas is then injected into the section to pressurize it and production of residual oil and steam condensate is continued. Concurrently with pressurization, SAGD is practised in an adjacent reservoir section. As a result, some of the residual oil in the first section is recovered and steam loss from the second section to the first section is minimized.

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