Effects of Imbibing Agents on Oil Displacement Efficiency by Imbibitions
Abstract
The imbibition efficiency influence factors, such as interfacial tension, emulsification, viscosity, and so on were evaluated for the extra/ultra low permeability outcrop cores and fine oil sands. The experimental results show that for the ordinary low permeability and ultra-low permeability cores, the static imbibition efficiency increases with the decrease of permeability and size of throat and pore radius. At the same time, the emulsification and viscosity of the imbibing agent system should not be higher than a certain value, and the turbidity should be low. The interfacial tension has a suitable range for spontaneous imbibition. Reservoir wettability affects the direction of capillary force. The pore radius and curvature radius of pore port determines the value of capillary force. Thus, the reversion and adjustment of reservoir wettability is an important factor for imbibition oil recovery
Keywords
Imbibitions, Oil recovery, Application, Extra-low permeability, Ultra-low permeability.
DOI
10.12783/dtmse/ammme2016/6925
10.12783/dtmse/ammme2016/6925
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