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- W2068858023 abstract "Abstract The role of foamy oil flow in cold production of heavy oil has attracted considerable attention in the literature. It has been suggested in several studies that there may be a link between the presence of high Asphaltenes content and the foamability of oil. However, a systematic examination of the impact of Asphaltenes on the performance of solution gas drive, in connection with foamy oil flow, has not been reported. This paper presents an experimental study that addresses this issue. The objective of this study was to examine whether or not the presence of Asphaltenes has a strong influence on the performance of foamy solution gas drive. To this end, parallel solution gas drive experiments were conducted with a heavy crude oil from Lloydminster area and a de-asphalted version of the same oil. To eliminate the influence of oil viscosity, the original crude oil was diluted with a 50-50 mixture of heptanes and toluene to reduce viscosity to the same level as that of the de-asphalted oil. The experiments were carried out in a visual sand pack that permited observation of bubble formation in the sand. The results show that the effect of asphaltene content varies with the depletion rate. At higher depletion rates, the oil recovery and production profile of crude oil with asphaltene is different from those without asphaltenes. The presence of asphaltenes, appears to facilitate bubble nucleation, decreases the critical super-saturation and helps in maintaining the dispersed gas flow by suppressing bubble coalescence. However, as the depletion rate declines, the incremental recovery due to asphaltenes diminishes. The two crude oil samples provided similar recovery and production profile when the depletion rate was the slowest one used in this work." @default.
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- W2068858023 date "2005-06-20" @default.
- W2068858023 modified "2023-10-16" @default.
- W2068858023 title "Role of Asphaltene in Foamy Oil Flow" @default.
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- W2068858023 doi "https://doi.org/10.2118/94786-ms" @default.
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