A microvisual study of solution-gas-drive mechanisms in viscous oils

George, Dileep; Hayat, Oumezzaouche; Kovscek, Anthony R.

doi:10.1016/j.petrol.2004.08.003

Cited by 64 publications

(41 citation statements)

References 27 publications

(35 reference statements)

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“…George et al 40 also investigated the effect of viscosity on bubble coalescence in viscous oils under solution gas drive. Micro-models, cornered capillary tubes, and a bubble growth model were applied for further understanding.…”

Section: Effect Of Oil Viscosity On Stability Of Foamy Oilmentioning

confidence: 99%

Gas Recharging Process Study in Heavy Oil Reservoirs

Zhang

2014

Day 3 Thu, June 12, 2014

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Gas recharging process, as a supplemental technique for heavy oil reservoirs with thin layers, has attracted researchers' attention. This thesis focused on three post-cold production process studies-CH 4 recharging and depletion, CO 2 and C 3 H 8 huff-puff, and C 3 H 8 flooding. Two 18m in length glass beads and sand packed cores and one 1.5m in length sand packed core were used for testing. The mechanisms of each process were investigated. Foamy oil flow under the solution gas drive mechanism was clearly observed during two long core methane depletion processes.The effects of core length and permeability on oil recovery were discussed. CT scanning technique was applied to capture core saturation variations after each process at the 1.5m core, which helped better understanding of the mechanisms of the three gas recharging processes and also was successfully applied to explain what happened in two long cores.iii Acknowledgements

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Section: Effect Of Oil Viscosity On Stability Of Foamy Oilmentioning

confidence: 99%

Gas Recharging Process Study in Heavy Oil Reservoirs

Zhang

2014

Day 3 Thu, June 12, 2014

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“…Viscosity plays an important role in any foam (aqueous or non-aqueous) because it is directly related to the drainage of interstitial fluid in the foam [58][59][60]63]. In addition to lowering the drainage rate, high viscosity systems can also lower the rate of gas diffusion between bubbles (Ostwald ripening) and both effects tend to promote foam stability.…”

Section: Factors Contributing To Crude Oil Foam Formationmentioning

confidence: 99%

Non-Aqueous and Crude Oil Foams

Blázquez

Emond

Schneider

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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D o s s i e rRe´sume´-Mousses non aqueuses et mousses pe´trolie`res -Les mousses produites a`partir de syste`mes non aqueux sont moins fre´quentes que les mousses a`base d'eau, mais elles jouent un roˆle important dans de nombreuses applications et proce´de´s industriels. La faible tension de surface des liquides a`base d'hydrocarbures limite l'adsorption des agents de surface classiques et par conse´quent diffe´rents compose´s et me´thodes doivent eˆtre conside´re´s afin de ge´ne´rer et de stabiliser les mousses a`base d'huile. De meˆme, le cassage des mousses non aqueuses inde´sirables ne´cessite des conside´rations spe´cifiques a`ces syste`mes. Les mousses de pe´trole pre´sentent un inte´reˆt particulier de par leur complexite´en raison de la grande varie´te´des compose´s et des gaz qui peuvent les constituer. Nous pre´sentons dans cet article un aperc¸u des principaux me´canismes reconnus comme importants pour la stabilite´des mousses non aqueuses avec une conside´ration toute particulie`re pour les mousses de pe´trole brut.Abstract -Non-Aqueous and Crude Oil Foams -Foams produced from non-aqueous media are less common than water-based foams but they play an important role in many industries and engineering processes. The low surface tension of hydrocarbon fluids limits the adsorption of common surface activity substances and different compounds and methods must be considered to generate and stabilize oil-based foam. Likewise, the destruction of unwanted non-aqueous based foam requires specific considerations not found with aqueous systems. Of particular interest are petroleum-based foams, which are highly complex due to the wide variety of compounds and gases that can be found. We provide an overview of the major mechanisms known to be important for non-aqueous foam stability with a spotlight on crude-oil foams.

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“…The presence of such groups correlates with foaming in distillation columns (Callaghan, et al, 1985) as well as interfacial activity in mineral processing (Zhou et al, 1999). Oil viscosity also clearly plays a role in retarding the coalescence of small gas bubbles into a continuous gas phase thereby aiding oil recovery (George et al, 2005) …”

Section: Oil Chemical Analysesmentioning

confidence: 99%

Transformation of Resources to Reserves: Next Generation Heavy-Oil Recovery Techniques

Kovscek¹,

Castanier²

2007

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A microvisual study of solution-gas-drive mechanisms in viscous oils

Cited by 64 publications

References 27 publications

Gas Recharging Process Study in Heavy Oil Reservoirs

Gas Recharging Process Study in Heavy Oil Reservoirs

Non-Aqueous and Crude Oil Foams

Transformation of Resources to Reserves: Next Generation Heavy-Oil Recovery Techniques

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