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Chemical Additives and Foam to Enhance SAGD Performance

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Advisor
Chen, Zhangxing
Author
Li, Ran
Committee Member
Song, Hua
Clarke, Matthew
Other
SAGD
Chemical Additives
Foam
Subject
Engineering--Chemical
Engineering--Petroleum
Type
Thesis
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Abstract
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 study tells that, owing to gas mobility control, interfacial tension reduction and emulsification, the steam chamber profile is substantially controlled with a reduced heat loss, and the residual oil saturation drops dramatically. A heterogeneous model based on a Suncor Firebag project is further employed to testify that bubbles are conducive to improve volumetric sweep efficiency by diverting steam into low-permeable area. Simultaneously, foam favors to reduce the influences of top water zone and maintain a bowl-shaped and uniformly-developed steam chamber growth. Afterwards, an analytical method is introduced to further explain the physical mechanisms with a modified finger rising model, which shows that CAFA-SAGD (chemical additives and foam assisted SAGD) owns a lower finger rising velocity with less steam consumption.
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University of Calgary
Faculty
Graduate Studies
Doi
http://dx.doi.org/10.5072/PRISM/25312
Uri
http://hdl.handle.net/11023/2874
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