Method of assisting surface lift of heated subsurface...

Details Method of assisting surface lift of heated subsurface... Method of assisting surface lift of heated subsurface...

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01) E21B 37/00 (2006.01)

Patent

CA 1192127

ABSTRACT OF THE DISCLOSURE A method and apparatus is described for produc- ing viscous petroleum from a subsurface formation. The apparatus includes a generally horizontal cased well through the subsurface formation with injection and pro- duction tubings within the well. The casing is perforated and the inner tubings carry a movable packer and a rotat- able agitator. The method comprises injecting a heating and drive fluid for moving heated viscous petroleum through the perforations in the casing and into the well for production to the wellhead. Production is monitored for the ratio of produced packer fluid and viscous petro- leum. Based on that ratio, the packer is moved within the casing to positions along the horizontal well to maximize production of petroleum. The rotatable agitator assists in removal from the well bore of formation solids produced with the viscous petroleum.

429968

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