Miscibility

About: Miscibility is a research topic. Over the lifetime, 5521 publications have been published within this topic receiving 133547 citations. The topic is also known as: miscible.

Effects of Mobile Water on Multiple-Contact Miscible Gas Displacements

Abstract: This paper presents the effects of mobile water on multiple contact miscible displacements under water-wet and oil-wet conditions. Tests were conducted in 8-foot (244 cm) water-wet and oil-wet Berea cores in which CO/sub 2/ and water were injected both separately and simultaneously to displace a reservoir oil. The data presented focus on effects of water in the oil-moving zone where the CO/sub 2/ is generating miscibility with the oil and mobilizing residual oil to waterflooding. Special emphasis is placed on understanding the effect of mobile water saturation on the oil displacement efficiency and the component transfer between phases necessary to develop miscibility in the CO/sub 2/-reservoir oil system. This study demonstrates that reservoir wettability is a key factor in the performance of AGWIP. Gas-water injection can, under certain conditions, have adverse effects on the characteristics of the oil moving zone. These effects are in part caused by the water trapping portions of the oil and solvent. It was observed that mobile water did not change the mass transfer process by which miscibility develops in a multiple contact miscible displacement. (JMT)

Mixing of Two Immiscible Liquids within the Polymer Microgel Adsorbed at Their Interface

Abstract: We report on the behavior of two immiscible liquids within polymer microgel adsorbed at their interface. By means of dissipative particle dynamics (DPD) simulations and theoretical analysis in the framework of the Flory–Huggins (FH) lattice theory, we demonstrate that the microgel acts as a “compatibilizer” of these liquids: their miscibility within the microgel increases considerably. If the incompatibility of the liquids is moderate, although strong enough to induce phase separation in their 1:1 composition, they form homogeneous mixture in the microgel interior. The mixture of highly incompatible liquids undergoes separation into two (micro)phases within the microgel likewise out of it; however, the segregation regime is weaker and the concentration profiles are characterized by a weaker decay (gradient) in comparison with those of two pure liquids. The enhanced miscibility is a result of the screening of unfavorable interactions between unlike liquid molecules by polymer subchains. We have shown that ...