Asphaltene Deposition Induced by Carbon Oxide and its Influence on Displacement Efficiency

Feng Lan Zhao; Ji Rui Hou; Shi Jun Huang

doi:10.4028/www.scientific.net/AMR.594-597.2451

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 594-597Asphaltene Deposition Induced by Carbon Oxide and...

Asphaltene Deposition Induced by Carbon Oxide and its Influence on Displacement Efficiency

Abstract:

CO₂ is inclined to dissolve in crude oil in the reservoir condition and accordingly bring the changes in the crude oil composition, which will induce asphaltene deposition and following formation damage. In this paper, core flooding device is applied to study the effect of asphaltene deposition on flooding efficiency. From the flooding results, dissolution of CO₂into oil leads to recovery increase because of crude oil viscosity reduction. But precipitated asphaltene particles may plug the pores and throats, which will make the flooding effects worse. Under the same experimental condition and with equivalent crude oil viscosity, the recovery of oil with higher proportion of precipitated asphaltene was relatively lower during the CO₂ flooding, so the asphltene precipitation would affect CO₂ displacement effici_{Subscript text}ency and total oil recovery to some extent. Combination of static diffusion and dynamic oil flooding would provide basic parameters for further study of the CO₂ flooding mechanism and theoretical evidence for design of CO₂ flooding programs and forecasting of asphaltene deposition.

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Periodical:

Advanced Materials Research (Volumes 594-597)

Pages:

2451-2454

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.594-597.2451

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Online since:

November 2012

Authors:

Feng Lan Zhao, Ji Rui Hou, Shi Jun Huang

Keywords:

Asphaltene Deposition, Carbon Dioxide Flooding, Diffusion, Formation Damage, Oil Displacement Efficiency

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