OIL RECOVERY SYSTEM AND METHOD

摘要

A system and process are provided for recovering oil from an oil-bearing formation. An oil recovery formulation that is first contact miscible with a liquid petroleum composition that is comprised of at least 15 mol % dimethyl sulfide is introduced together with steam or hot water into a subterranean oil-bearing formation comprising heavy oil, extra heavy oil, or bitumen, and oil is produced from the formation.

主权项

1. A method for recovering petroleum comprising:
providing an oil recovery formulation that comprises at least 15 mol % dimethyl sulfide, wherein the oil recovery formulation is first contact miscible with liquid phase petroleum; providing steam or hot water having a temperature of at least 85° C.; introducing the steam or hot water and the oil recovery formulation together into a subterranean oil-bearing formation comprising crude oil having a dynamic viscosity of at least 1000 mPa s (1000 cP) at 25° C. and an API gravity at 15.5° C. (60° F.) of at most 20° as measured in accordance with ASTM Method D6822, wherein the oil recovery formulation comprises at least 15 wt. % of the combined steam or hot water and oil recovery formulation introduced together into the formation; contacting the steam or hot water and the oil recovery formulation with the oil in the formation; and producing oil from the formation after introducing the steam or hot water and the oil recovery formulation into the formation.