A Visual Investigation of CO2 Convective Mixing in Water and Oil at the Pore Scale Using a Micromodel Apparatus at Reservoir Conditions
Abstract
:1. Introduction
2. Experimental Method
2.1. Experimental Setup
2.2. Experimental Cases
2.3. Experimental Procedure
2.4. Rayleigh (Ra) Number Calculation
3. Results and Discussion
3.1. Case 1: CO2 Mixing in a 100% Water Saturation System
3.2. Case 2: CO2 Mixing in a Residual Oil-Saturated (Sor) System
3.3. General Discussion
4. Future Work
5. Conclusions
- CO2 always found the easiest path through connected pores during mixing, and then CO2 was transported into less connected pores and dead-end pores.
- CO2 transport into dead-end pores was slower than CO2 flow through the preferential path.
- We observed how CO2 was transported through trapped oil ganglia and into the water phase again. It was also observed that oil ganglia dampened the CO2 transport velocity outside the main preferential path.
- CO2 mixing into dead-end pores and less connected pores was diffusion dominant.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Total Height | Height from Top Pore to Bottom Pore (H) | Width | The Average Depth of Pores | Pore Volume | Wettability | ||
---|---|---|---|---|---|---|---|
70 mm | 51.2 mm | 7 mm | 40 µm | 0.01 cm3 | 0.61 | 10 D | Water-wet |
Case # | The Initial Condition of the Micromodel |
---|---|
1 | 100% water saturation |
2 | Residual oil saturation (Sor) |
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Amarasinghe, W.; Farzaneh, S.; Fjelde, I.; Sohrabi, M.; Guo, Y. A Visual Investigation of CO2 Convective Mixing in Water and Oil at the Pore Scale Using a Micromodel Apparatus at Reservoir Conditions. Gases 2021, 1, 53-67. https://doi.org/10.3390/gases1010005
Amarasinghe W, Farzaneh S, Fjelde I, Sohrabi M, Guo Y. A Visual Investigation of CO2 Convective Mixing in Water and Oil at the Pore Scale Using a Micromodel Apparatus at Reservoir Conditions. Gases. 2021; 1(1):53-67. https://doi.org/10.3390/gases1010005
Chicago/Turabian StyleAmarasinghe, Widuramina, Seyed Farzaneh, Ingebret Fjelde, Mehran Sohrabi, and Ying Guo. 2021. "A Visual Investigation of CO2 Convective Mixing in Water and Oil at the Pore Scale Using a Micromodel Apparatus at Reservoir Conditions" Gases 1, no. 1: 53-67. https://doi.org/10.3390/gases1010005