Plugging and Improving Oil Recovery Performance of Polyacrylamide Nanogel in Porous Media
The heterogeneity of a reservoir is always a problem during oil production because injection fluids preferentially flow through higher permeability zones. Hydrogel has been used in petroleum industry by plugging high permeability zone to solve the problem in reservoirs. This work investigated the flow behavior of polyacrylamide based nanogel in porous media, which included injectivity, plugging performance and oil recovery improvement. Two factors were controlled in this work: crosslinking density of nanogel and permeability of porous media. Among the nanogels synthesized by four different crosslinker concentrations, swollen particles have a larger size with lower crosslinker concentration. Meanwhile, within a same permeability range, there were higher plugging efficiency and oil recovery improvement with lower crosslinker concentration. Nanogel has a less plugging efficiency but a better oil recovery improvement in lower permeability porous media.
H. Ding et al., "Plugging and Improving Oil Recovery Performance of Polyacrylamide Nanogel in Porous Media," Advanced Materials - TechConnect Briefs 2017, vol. 1, pp. 188-191, TechConnect, May 2017.
11th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 20th Annual Nanotech Conference and Expo, and the 2017 National SBIR/STTR Conference (2017: May 14-17, Washington, DC)
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Conformance control; Enhanced oil recovery; Gel treatment; Nanogel
International Standard Book Number (ISBN)
Article - Conference proceedings
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01 May 2017