E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/241 (2006.01)
Patent
CA 2693036
The present invention relates generally to in situ hydrate control during hydrocarbon production when applying a recovery method utilizing cyclic injection of light hydrocarbon solvents. Hydrate formation is limited by creating an energy reserve within a hydrocarbon reservoir adjacent to the wellbore. A heated solvent is injected during an injection phase of a cyclic solvent dominated recovery process to form a heated region adjacent to the wellbore at the end of an injection cycle. The energy reserve is used to act against the evaporative cooling effect caused by subsequent production and associated depressurization to maintain reservoir conditions outside of hydrate formation conditions. In situ conditions are estimated and injected energy amounts are controlled.
Beckman Mark S.
Kaminsky Robert D.
Khaledi Rahman
Kwan Mori Y.
Lebel J. Pierre
Borden Ladner Gervais Llp
Exxonmobil Upstream Research Company
Imperial Oil Resources Limited
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