Increasing Viscous Oil Recovery in the Microbubble Filtration Mode using Supercritical Fluid Systems
A. V. Radaev1, A. N. Sabirzyanov2
1Institute of Applied Research, Academy of Sciences of the Republic of Tatarstan, Kazan, 420111, Russia
2Kazan National Research Technological University, Kazan, 420015, Russia
Keywords: supercritical fluid, oil recovery efficiency, two-phase filtration, microbubble recovery mode, rims of supercritical CO and water
Abstract
An experimental stand has been developed to study oil recovery using supercritical fluid systems of bulk and composite homogeneous porous materials in the mode of miscible and microbubble filtration of a mixture of oil and supercritical carbon dioxide. A device for visualizing the emergence of supercritical CO2 microbubbles from the experimental cell with a porous medium has been designed. The oil recovery by supercritical CO2 and rims of supercritical CO2 and water from a homogeneous bulk porous medium has been experimentally studied. It has been shown that the miscible mode of viscous oil recovery by supercritical CO2 is most efficient and the efficiency of viscous oil recovery in the microbubble mode can be increased using rims of supercritical CO2 and water. The mechanism of oil recovery enhancement in the region of microbubble recovery of viscous oil by supercritical CO2 is described.
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