Determination of binary diffusion coefficients between hot liquid solvents and bitumen with X-ray CT

Imai, Motonao; Mikami, Kazuaki; Suganuma, Tatsuya; Tsuchiya, Yoshihiro; Nakagawa, Kazunori; Takahashi, Satoru

doi:10.1016/j.petrol.2019.02.049

Cited by 13 publications

(6 citation statements)

References 9 publications

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“…[5][6][7] Solvent-aided SAGD (SA-SAGD) has been proposed as an alternative to improve the efficiency of SAGD. [5][6][7][8][9] In SA-SAGD, a small amount of a hydrocarbon solvent is co-injected with water steam to further reduce the viscosity of the bitumen near the chamber edge. This process requires a smaller amount of steam (i.e., less consumption of energy and water) to recover the same amount of bitumen and can exhibit a higher oil production rate than SAGD.…”

Section: Introductionmentioning

confidence: 99%

“…Solvent-aided SAGD (SA-SAGD) has been proposed as an alternative to improve the efficiency of SAGD. − In SA-SAGD, a small amount of a hydrocarbon solvent is co-injected with water steam to further reduce the viscosity of the bitumen near the chamber edge. This process requires a smaller amount of steam (i.e., less consumption of energy and water) to recover the same amount of bitumen and can exhibit a higher oil production rate than SAGD. , Vapor extraction (VAPEX), a cold-production process, has also been proposed as an alternative for heavy-oil recovery. − In VAPEX, vaporized solvents are injected instead of steam, which dissolve in the oil, dilute the oil, and decrease its viscosity.…”

Section: Introductionmentioning

confidence: 99%

“…This diffusion effect is especially important in the gas injection process because concentration gradients easily occur near the injection zone in this process. The molecular diffusion coefficients in oils have been characterized in several ways. ,, Ohata et al estimated the molecular diffusion coefficients from a combination of experimental data using a pressure–volume–temperature ( PVT ) cell and simulation matching to the pressure decay. Imai et al estimated the molecular diffusion coefficients by reproducing the time-lapse concentration profiles obtained by X-ray computed tomography imaging.…”

Section: Introductionmentioning

confidence: 99%

“…The molecular diffusion coefficients in oils have been characterized in several ways. ,, Ohata et al estimated the molecular diffusion coefficients from a combination of experimental data using a pressure–volume–temperature ( PVT ) cell and simulation matching to the pressure decay. Imai et al estimated the molecular diffusion coefficients by reproducing the time-lapse concentration profiles obtained by X-ray computed tomography imaging. The swelling factor, which is defined as the ratio of the volume of the oil–solvent mixture to the original oil volume, is also an important parameter.…”

Section: Introductionmentioning

confidence: 99%

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Application of a Digital Oil Model to Solvent-Based Enhanced Oil Recovery of Heavy Crude Oil

et al. 2019

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To investigate enhanced oil recovery processes, we constructed a molecular model of a live heavy crude oil (digital oil) and studied the crude oil properties at the reservoir temperature and a wide range of pressures. We identified the liquid phase components of the digital oil by flash calculation and calculated the density and viscosity by molecular dynamics simulations. The calculated density and viscosity were in good agreement with experimental data. To evaluate the effectiveness of various solvents to enhance oil recovery, we calculated the oil property changes when different solvents were added to the digital oil. First, we compared methane and carbon dioxide (CO 2 ). The results indicated that CO 2 was more effective in terms of oil-viscosity reduction, oil swelling, and diffusion in the oil. Second, we evaluated the effectiveness of 11 different solvents: nitrogen, CO 2 , methane, ethane, propane, n-heptane, n-octane, toluene, and three xylene isomers (o-xylene, m-xylene, and pxylene). Ethane had the greatest effect on oil-viscosity reduction and oil swelling, and CO 2 had the highest diffusion coefficient. From these results, ethane and CO 2 are appropriate solvents for this crude oil. In addition, it is interesting to note that the decreases of the viscosity among the three xylene isomers were different, but there were no differences in the swelling factors and diffusion coefficients. The different rotation motion characteristics of the xylene isomers can account for the viscosity differences. Such information will be helpful for further development of digital oil models.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of a Digital Oil Model to Solvent-Based Enhanced Oil Recovery of Heavy Crude Oil

et al. 2019

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“…Macroscale assessments indirectly gauge a rejuvenator’s diffusion through physical indices and rheological properties . Microscale evaluations assess a rejuvenator’s molecular size, functional groups, and composition to directly evaluate the diffusion properties. − Additionally, molecular simulations have limitations despite maturity, including slow diffusion in aged asphalt binder and deviations between the simulated and experimental outcomes. These factors impede the accurate measurement of permeation and diffusion.…”

Section: Introductionmentioning

confidence: 99%

Investigating Asphalt Rejuvenators from Biowastes Based on Their Wetting, Diffusion, and Compatibility

Zhou,

Liu,

Fini

et al. 2024

ACS Sustainable Chem. Eng.

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Achieving NetZero carbon emissions necessitates innovative solutions for revitalization and recycling of asphalt pavements. This study focuses on the efficacy of biobased rejuvenators in enhancing the properties of aged asphalt binder, emphasizing their diffusion, wetting, and compatibility. We discovered that low-viscosity rejuvenators, specifically palm oil and waste cooking oil, significantly improve wetting, with rates of 79.2 and 317.2 mm/s, respectively. The diffusion rate was found to correlate with chemical composition and viscosity, with palm oil leading, followed by soybean and castor oils. Compatibility assessment, based on the thermodynamic free energy of mixing, Han curve analysis, and Cole−Cole plots, revealed that palm oil effectively restored the molecular and colloidal structures of aged asphalt. These findings underscore the significance of rejuvenator compatibility for optimal performance and sustainability, contributing to the advancement of NetZero carbon road infrastructure.

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Quantization of the water presence effect on the diffusion coefficients of the CO2/oil system with the dynamic pendant drop volume analysis technique

Liu,

Yan,

Zang

et al. 2023

Chemical Engineering Science

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Determination of binary diffusion coefficients between hot liquid solvents and bitumen with X-ray CT

Cited by 13 publications

References 9 publications

Application of a Digital Oil Model to Solvent-Based Enhanced Oil Recovery of Heavy Crude Oil

Application of a Digital Oil Model to Solvent-Based Enhanced Oil Recovery of Heavy Crude Oil

Investigating Asphalt Rejuvenators from Biowastes Based on Their Wetting, Diffusion, and Compatibility

Quantization of the water presence effect on the diffusion coefficients of the CO2/oil system with the dynamic pendant drop volume analysis technique

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