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01-02-2013 | Original Paper | Issue 2/2013

Journal of Polymer Research 2/2013

Effects of polymers as direct CO2 thickeners on the mutual interactions between a light crude oil and CO2

Journal:
Journal of Polymer Research > Issue 2/2013
Authors:
Yongan Gu, Shiyang Zhang, Yuehui She

Abstract

In this paper, two commercial polymers with relatively low molecular weights, poly vinyl ethyl ether (PVEE) and poly 1-decene (P-1-D), are tested as direct thickeners for CO2 and their detailed effects on the mutual interactions between a light crude oil and polymer-thickened CO2 are experimentally studied under different reservoir pressures. More specifically, the polymer cloud-point pressures are measured at different known polymer solubilities in supercritical CO2. The equilibrium interfacial tensions (IFTs) and onset pressures of quick polymer dissolution into CO2 are measured for the polymer−pure CO2 systems. The polymer-swelling effect due to pure CO2 dissolution is observed and examined. To study the mutual interactions between the light crude oil and polymer-thickened CO2, their equilibrium IFTs are measured and their so-called minimum miscibility pressures (MMPs) and onset pressures of the initial quick light-hydrocarbons extraction by CO2 are determined. The oil-swelling effect due to polymer-thickened CO2 dissolution is also visualized and analyzed. All the experimental data for polymer-thickened CO2 are compared with those for pure CO2.

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