Laboratory scale experimental analysis of Steam-Over-Solvent injection in Fractured Reservoirs (SOS-FR) for heavy-oil recovery

Al-Bahlani, Al-Muatasim; Babadagli, Tayfun

doi:10.1016/j.petrol.2012.01.021

Cited by 19 publications

(11 citation statements)

References 18 publications

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“…Static experiments were conducted by soaking Berea sandstone plugs and carbonate cores in hot water and different solvents, and dynamic experiments were performed by injecting hot water and heptane alternatively into fractured sandstone cores. 18 Higher recovery factor and asphaltene precipitation were observed when lighter hydrocarbons were applied in the static experiment. Dynamic experiments showed that an optimal injection rate with highest oil recovery rate and lowest solventoil ratio exists.…”

Section: ■ Introductionmentioning

confidence: 91%

“…Al-Bahlani and Babadagli proposed a new process named “Steam-Over-Solvent in Fractured Reservoir” (SOS-FR) which consists of three phases: steam or hot water preheating, solvent injection, and solvent retrieval by steam reinjection. Static experiments were conducted by soaking Berea sandstone plugs and carbonate cores in hot water and different solvents, and dynamic experiments were performed by injecting hot water and heptane alternatively into fractured sandstone cores . Higher recovery factor and asphaltene precipitation were observed when lighter hydrocarbons were applied in the static experiment.…”

Section: Introductionmentioning

confidence: 99%

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Viscous Oil Recovery and In Situ Deasphalting in Fractured Reservoirs: Part 1. The Effect of Solvent Injection Rate

et al. 2018

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Steam-based EOR methods for viscous oil recovery from fractured reservoirs have significant challenges in both cost and energy efficiency. In response, solvent-based methods have been of interest because of their low energy intensity, low greenhouse gas emissions, and no fresh water consumption. Injection strategies for viscous oil recovery by solvent include liquid extraction and vapor oil gravity drainage. Understanding the mechanisms in each phase is of great value for the successful application and optimization of solvent EOR processes. The work presented here studies the effect of solvent injection rate on viscous oil recovery by liquid extraction with n-butane in vertically placed sandstone cores with an artificial fracture. The oil production rate, ultimate recovery, and in situ deasphalting in different sections of the core are analyzed. The oil production rate increased with solvent injection rate until it leveled off as the injection rate exceeded a critical value. The ultimate recovery factor is nearly the same for all solvent injection rates below the critical value. However, it is significantly reduced at higher injection rates. A conceptual model based on convective mass transfer is proposed and the effect of mechanical dispersion is discussed. In situ deasphalting was observed in all cases. The cause of the unexpected changes in production rate was attributed to severe asphaltene deposition and remobilization in the fractured permeable rock. In such a medium, solvent injection rate seems to show an optimal value for maximizing oil production rate, ultimate recovery factor, and solvent efficiency.

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Section: ■ Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Viscous Oil Recovery and In Situ Deasphalting in Fractured Reservoirs: Part 1. The Effect of Solvent Injection Rate

et al. 2018

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“…The range of values given in this table were determined based on previous reservoir simulation trial (Al-Bahlani and Babadagli, 2012;Al-Gosayir et al, 2013). In some cases, such as cooling heating periods that reach up to 120-180 days, the optimum values touch the range of boundaries.…”

Section: Resultsmentioning

confidence: 99%

In-situ recovery of heavy-oil from fractured carbonate reservoirs: Optimization of steam-over-solvent injection method

Al-Gosayir

Babadagli

Leung

et al. 2015

Journal of Petroleum Science and Engineering

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“…For instance, the reservoir thickness of well LJ75-61 in the Jing'an block was 23.6 m, the thickness of residual oil saturation was 52.2%. The water-flushed zone was only in the relatively high permeability zone (Al-Bahlani and Babadagli, 2012). Scanning electron microscope (SEM) images ( Fig.…”

Section: Reservoir Characteristicsmentioning

confidence: 99%

Changing characteristics of ultralow permeability reservoirs during waterflooding operations

Gao

Zhu

et al. 2013

Pet. Sci.

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Abstract:The characteristics of ultralow permeability reservoirs changed after waterflooding. Thinsection analysis and scanning electron microscopy (SEM) of core samples from inspection wells indicated Some asphaltene precipitates on the surface of formation rock would influence the reservoir porosity, permeability, wettability, and electrical properties. In this paper, the changes of physical, electrical, and

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Laboratory scale experimental analysis of Steam-Over-Solvent injection in Fractured Reservoirs (SOS-FR) for heavy-oil recovery

Cited by 19 publications

References 18 publications

Viscous Oil Recovery and In Situ Deasphalting in Fractured Reservoirs: Part 1. The Effect of Solvent Injection Rate

Viscous Oil Recovery and In Situ Deasphalting in Fractured Reservoirs: Part 1. The Effect of Solvent Injection Rate

In-situ recovery of heavy-oil from fractured carbonate reservoirs: Optimization of steam-over-solvent injection method

Changing characteristics of ultralow permeability reservoirs during waterflooding operations

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