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Published on: October 10, 2016
Performance Evaluation of Enhanced Oil Recovery by Host-Guest Interaction of β-Cyclodextrin Polymer/Hydrophobically
Xi Li1,2, Zhongbing Ye1,2, Pingya Luo1
1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China.
Abstract:
In this work, a hydrophobically associative polymer (HAP) was mixed with β-cyclodextrin and epichlorohydrin polycondensate (β-CDP) in an aqueous solution to enhance the intermolecular interaction through host-guest inclusion between hydrophobes and cyclodextrins. Results showed that the host-guest interaction improved the thickening ability and viscoelasticity of the HAP solution and maintained its shear thinning behavior. The host-guest inclusion system demonstrated special viscosity-temperature curves and variable activation energy. Enhanced oil recovery (EOR) performance tests showed that the oil increment produced by the host-guest inclusion system was 5.5% and 9.3% higher than that produced by the HAP and the partially hydrolyzed polyacrylamide solution, respectively. Compared with pure HAP, β-CDP/HAP has a better comprehensive performance and is more attractive for EOR in high-temperature reservoirs.
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