Microfluidic PVT–Saturation Pressure and Phase-Volume Measurement of Black Oils
- Shahnawaz Molla (Schlumberger) | Farshid Mostowfi (Schlumberger)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- February 2017
- Document Type
- Journal Paper
- 233 - 239
- 2017.Society of Petroleum Engineers
- Microchannel, Saturation pressure, Microfluidic, PVT, Phase behavior
- 6 in the last 30 days
- 314 since 2007
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In this work, we present a small-scale pressure/volume/temperature (PVT) cell that allows for the measurement of saturation pressure and phase-volume ratio by use of only a few microliters of black-oil samples. This novel PVT measurement technique has been successfully tested on live samples at elevated pressure (86 MPa) and temperature (150°C).
In the microfluidic PVT platform, the small microfluidic device performs the same function as the laboratory-scale pressurized visual PVT cell. At the heart of the microfluidic device, is a long and narrow capillary, densely packed in a serpentine shape, embedded on the device. The capillary is nearly 1 m long and has a total volume of 5 µL. The microfluidic device is fabricated with glass and silicon, which allow visual monitoring of a fluid sample at various pressures and temperatures. To acquire PVT data, the pressure in the capillary is systematically reduced to accurately detect the appearance of micron-sized gas bubbles in a sample at saturation pressure. Because of the small thermal mass of the device, the temperature of the sample can be changed rapidly, which enables the measurement of multiple saturation pressures in quick succession. Below the saturation pressure, the growing gas bubbles form a segmented gas/liquid distribution in the capillary. The lengths of the liquid and gas segments are measured in real-time with an automated image-capturing and analysis tool to determine the gas/liquid phase-volume ratio at a given pressure.
Validation tests have proved this technique to be repeatable and feasible for rapid PVT measurements of black oils [gas/oil ratio (GOR) ranging from 102 to 143m3/m3]. The results presented in this study demonstrate that the microfluidic PVT system can measure saturation pressure and phase-volume with data quality comparable to that of the conventional PVT method, however, with significantly smaller sample volume and faster turnaround. The microfluidic PVT system is demonstrated to have the potential to become a reliable and portable measurement platform.
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Bowden, S. A., Wilson, R., Parnell, J. et al. 2009. Determination of the Asphaltene and Carboxylic Acid Content of a Heavy Oil Using a Microfluidic Device. Lab on a Chip 9 (6): 828–832. http://dx.doi.org/10.1039/B814495H.
Danesh, A. 1998. PVT and Phase Behaviour of Petroleum Reservoir Fluids. Elsevier Science.
de Haas, T. W., Fadaei, H., Guerrero, U. et al. 2013. Steam-on-a-Chip for Oil Recovery: The Role of Alkaline Additives in Steam-Assisted Gravity Drainage. Lab on a Chip 13 (19): 3832–3839. http://dx.doi.org/10.1039/C3LC50612F.
Eskin, D. and Mostowfi, F. 2012. A Model of a Bubble Train Flow Accompanied With Mass Transfer Through a Long Microchannel. International Journal of Heat and Fluid Flow 33 (1): 147–155. http://dx.doi.org/10.1016/j.ijheatfluidflow.2011.11.001.
Fisher, R. Shah, M. K., Eskin, D. et al. 2013. Equilibrium Gas-Oil Measurements Using a Microfluidic Technique. Lab on a Chip 13 (13): 2623–2633. http://dx.doi.org/10.1039/c31c00013c.
Fries, D. M. and von Rohr, P. R. 2009. Liquid Mixing in Gas-Liquid Two-Phase Flow by Meandering Microchannels. Chemical Engineering Science 64: 1326–1335. http://dx.doi.org/10.1016/j.ces.2008.11.019.
Kandlikar, S. G., Garimella, S., Li, D. et al. 2005. Heat Transfer and Fluid Flow in Minichannels and Microchannels. Elsevier.
Kolb, W. B. and Cerro, R. L. 1991. Coating the Inside of a Capillary of Square Cross-Section. Chemical Engineering Science 46: 2181–2195. http://dx.doi.org/10.1016/0009-2509(91)85119-1.
Kuzmin, A., Januszewski, M., Eskin, D. et al. 2013. Lattice Boltzmann Study of Mass Transfer for Two-Dimensional Bretherton/Taylor Bubble Train Flow. Chemical Engineering Journal 225: 580–596. http://dx.doi.org/10.1016/j.cej.2013.03.123.
Miralles, V., Huerre, A., Malloggi, F. et al. 2013. A Review of Heating and Temperature Control in Microfluidic Systems: Techniques and Applications. Diagnostics 3 (1): 33–67. http://dx.doi.org/10.3390/diagnostics3010033.
Molla, S., Eskin, D., and Mostowfi, F. 2013. Two-Phase Flow in Microchannels: The Case of Binary Mixtures. Industrial & Engineering Chemistry Research 52 (2): 941–953. http://dx.doi.org/10.1021/ie301860u.
Mostowfi, F., Khristov, K., Czarnecki, J. et al. 2007. Electric Field Mediated Breakdown of Thin Liquid Films Separating Microscopic Emulsion Droplets. Applied Physics Letters 90: 184102. http://dx.doi.org/10.1063/1.2735550.
Mostowfi, F., Molla, S., and Tabeling, P. 2012. Determining Phase Diagrams of Gas-Liquid Systems Using a Microfluidic PVT. Lab on a Chip 12 (21): 4381–4387. http://dx.doi.org/10.1039/C2LC40706J.
Pedersen, K. S. and Christensen, P. L. 2006. Phase Behavior of Petroleum Reservoir Fluids. CRC Press.
Schneider, M. H., Sieben, V. J., Kharrat, A. M. et al. 2013. Measurement of Asphaltenes Using Optical Spectroscopy on a Microfluidic Platform. Analytical Chemistry 85: 5153–5160. http://dx.doi.org/10.1021/ac400495x.
Whitesides, G. M. 2006. The Origins and the Future of Microfluidics. Nature 442: 368–373. http://dx.doi.org/10.1038/nature05058.
Williams, J. M. 1994. Getting the Best Out of Fluid Samples. J Pet Technol 46: 752. SPE-29227 -PA. http://dx.doi.org/10.2118/29227-PA.
Wong, H., Morris, S., and Radke, C. J. 1992. Three-Dimensional Menisci in Polygonal Capillaries. Journal of Colloid and Interface Science 148: 317–336. http://dx.doi.org/10.1016/0021-9797(92)90171-H.