Effect of Gear-Pump Shear Rate on Oil/Water Dispersion
- Mo Zhang (University of Tulsa) | Ramin Dabirian (University of Tulsa) | Ram Mohan (University of Tulsa) | Ovadia Shoham (University of Tulsa) | Shoubo Wang (University of Tulsa)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- April 2019
- Document Type
- Journal Paper
- 2019.Society of Petroleum Engineers
- oil/water dispersion, gear pump, droplet size distribution
- 7 in the last 30 days
- 8 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Production equipment, such as pumps and chokes, cause shear in oil/water-mixture flow and form smaller droplets in the system, which might lead to operational and separation problems. Our objective in this paper is to provide new data on droplet sizes under different shear conditions in oil/water flow and compare these data with model predictions.
New experimental data on droplet-size distribution are acquired for a gear pump (configured in a closed loop) with an inline camera, using the bead-sizing tool. The acquired data capture the effects of the dispersed-phase volumetric fraction and shear intensity. Two prediction models for a centrifugal pump, the Pereyra (2011) and Kouba (2014) models, are modified to enable droplet-size-distribution predictions for a gear pump. These models use the log-normal-distribution and Rosin-Rammler-distribution methods, which have been found to match the acquired data relatively well.
The results demonstrate that mean droplets tend to decrease in diameter when the shear intensity increases. Moreover, the higher the dispersed-phase volumetric fraction is, the larger the resulting droplets will be. Comparisons between the acquired data and the proposed droplet-size-distribution prediction, which uses the modified dmax model, are very good for both Rosin-Rammler and log-normal distributions, with normalized root-mean-square deviation (NRMSD) of less than 7%.
|File Size||1 MB||Number of Pages||15|
AlShammari, A. 2013. Centrifugal Pump Shear Effects on Oil Continuous and Water Continuous Dispersed Flow. Master’s thesis, University of Tulsa, Tulsa, Oklahoma (May 2013).
Avila, C. 2006. Interfacial Phenomena in Oil-Water Dispersions. PhD dissertation, University of Tulsa, Tulsa, Oklahoma (May 2006).
Batchelor, G. K. 1953. The Theory of Homogeneous Turbulence. Cambridge, United Kingdom: Cambridge University Press.
Dabirian, R., Cui, S., Gavrielatos, I. et al. 2018. Evaluation of Models for Droplet Shear Effect of Centrifugal Pump. Proc., ASME 5th Joint US–European Fluids Engineering Division Summer Meeting, Montreal, Quebec, Canada, 15–20 July, V001T06A014. https://doi.org/10.1115/FEDSM2018-83318.
Gavrielatos, I., Dabirian, R., Mohan, R. S. et al. 2017. Separation Kinetics of Oil/Water Emulsions Stabilized by Nanoparticles. Proc., ASME Fluids Engineering Division Summer Meeting, Waikoloa, Hawaii, 30 July–3 August, V01BT10A005. https://doi.org/10.1115/FEDSM2017-69112.
Gavrielatos, I., Dabirian, R., Mohan, R. et al. 2018a. Oil/Water Emulsions Stabilized by Nanoparticles of Different Wettabilities. J. Fluids Eng 141 (12): 021301. https://doi.org/10.1115/1.4040465.
Gavrielatos, I., Dabirian, R., Mohan, R. et al. 2018b. Nanoparticle and Surfactant Oil/Water Emulsions—Is Different Treatment Required? Presented at the SPE Western Regional Meeting, Garden Grove, California, 22–26 April. SPE-190114-MS. https://doi.org/10.2118/190114-MS.
Kouba, G. 2003. Mechanistic Models for Droplet Formation and Breakup. Proc., ASME/JSME 4th Joint Fluids Summer Engineering Conference, Honolulu, Hawaii, 6–10 July, Vol. 1, 1607–1615. https://doi.org/10.1115/FEDSM2003-45542.
Kouba, G. E. 2014. Predicting Droplet Size Distribution. SPE Webinar, 25 June. Richardson, Texas: SPE. https://webevents.spe.org/products/predicting-droplet-size-distribution#tab-product_tab_overview.
Lemma, T. M. 2016. Characterization of Oklahoma Crude Oil and Produced Water Dispersions. Master’s thesis, University of Tulsa, Tulsa, Oklahoma (May 2016).
Levich, V. 1962. Physicochemical Hydrodynamics, first edition. Englewood Cliffs, New Jersey: Prentice-Hall.
Micro Motion is a registered trademark of Micro Motion, Inc., 7070 Winchester Circle, Boulder, Colorado 80301.
Nunez, C., Dabirian, R., Gavrielatos, I. R. et al. 2018. Effect of Particle Wettability on Mineral Oil-Distilled Water Emulsion Stability. Presented at the 8th World Congress on Particle Technology, Orlando, Florida, 22–26 April.
Pereyra, E. 2011. Modeling of Integrated Compact Multiphase Separation System (CMSS). PhD dissertation, University of Tulsa, Tulsa, Oklahoma (May 2011).
Rivas-Cardona, A., Marotta, E., and Whitsitt, E. 2012. Experimental and Analytical Investigation of the Cool-Down Behavior of an Insulated Pipe Assembly Under Subsea Conditions. SPE J. 17 (2): 602–616. SPE-149692-PA. https://doi.org/10.2118/149692-PA.
Shihao, C. 2015. Modeling and Simulation of Droplet Shear Effect of Production Equipment. Master’s thesis, University of Tulsa, Tulsa, Oklahoma (May 2015).
Zhang, M. 2015. Shear Effects of Gear Pump in Oil-Water Flow. Master’s thesis, University of Tulsa, Tulsa, Oklahoma (May 2015).