Modeling and Simulation of Chemical Additives and Foam Assisted SAGD
Ran , Li, Zhangxin , Chen & Keliu , Wu
Modeling and Simulation of Chemical Additives and Foam Assisted SAGD
Ran , Li, Zhangxin , Chen & Keliu , Wu
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Description
Adding chemical additives with in-situ generation of foam is an approach to enhance SAGD (steam assisted gravity drainage) performance both in terms of oil production and SOR (steam-oil ratio). Simulation studies tell that, owing to gas mobility control, interfacial tension reduction and emulsification, a steam chamber profile is substantially controlled with reduced heat loss and residual oil saturation drops significantly. Strong foam accumulates along the inner boundary of a steam chamber owing to lower capillary pressure and higher nitrogen concentration. A heterogeneous model based on an Athabasca project is employed to show that bubbles are conducive to improve volumetric sweep by diverting steam into a low permeable area. Simultaneously, foam favors to reduce the influences of a top water zone and maintain bowl-shaped and uniformly-developed steam chamber growth.
Ran Li, Zhangxin Chen, Keliu Wu, Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada, T2N 1N4
Ran Li, Zhangxin Chen, Keliu Wu, Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada, T2N 1N4