Producing asphaltic crude oil

Details Producing asphaltic crude oil Producing asphaltic crude oil

E - Fixed Constructions

21

B

166/40

E21B 43/24 (2006.01) E21B 43/12 (2006.01) E21B 43/30 (2006.01) E21B 49/00 (2006.01)

Patent

CA 1275914

A B S T R A C T PRODUCING ASPHALTIC CRUDE OIL An asphaltic crude oil is produced via a well system comprising a horizontal drainhole section extending through the reservoir formation. Formation plugging due to in-situ precipitation of asphalt during production operations is avoided by adequately sizing the horizontal drainhole section in the reservoir, thereby establishing near-wellbore pressures in the reservoir above the asphalt saturation pressure, without sacrificing production rates.

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