Research progress on supercritical CO thickeners

According to the thickening principle and molecular structure of thickeners, supercritical carbon dioxide (scCO 2 ) thickeners have been summarized and introduced by dividing into polymers, small molecular compounds and surfactants. The properties such as solubility, thickening effect, thickening co...

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Veröffentlicht in:Soft matter 2021-05, Vol.17 (2), p.517-5115
Hauptverfasser: Zhou, Ming, Ni, Ruifeng, Zhao, Yaxiong, Huang, Jiangyu, Deng, Xinyi
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Ni, Ruifeng
Zhao, Yaxiong
Huang, Jiangyu
Deng, Xinyi
description According to the thickening principle and molecular structure of thickeners, supercritical carbon dioxide (scCO 2 ) thickeners have been summarized and introduced by dividing into polymers, small molecular compounds and surfactants. The properties such as solubility, thickening effect, thickening condition and existing problems of scCO 2 thickeners are analyzed and assessed, and the research progress and prospects of scCO 2 thickeners are proposed. ScCO 2 is used in both CO 2 fracturing and CO 2 flooding for enhanced oil recovery (EOR). However, due to its low viscosity, the proppant carrying ability and filtration control ability of scCO 2 are too weak for fracturing. Also, in the process of CO 2 flooding, its low viscosity not only exacerbates the gravity override but also leads to an unfavorable mobility ratio that results in viscous fingering, early breakthrough, and poor sweep efficiency. Therefore, scCO 2 thickeners have good application prospects in oil and gas production for improved oil recovery (IOR). According to the thickening principle and molecular structure of thickeners, supercritical carbon dioxide (scCO 2 ) thickeners have been summarized and introduced by dividing into polymers, small molecular compounds and surfactants.
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title Research progress on supercritical CO thickeners
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