A Novel Oil-Water Separator Design Based on the Combination of Two Flow Resistance Mechanisms
- Xiaoqiu Wang (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing) | Quanshu Zeng (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing) | Zhiming Wang (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing) | Xiao Guo (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing) | Yanlong Zhao (State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum-Beijing)
- Document ID
- Offshore Technology Conference
- Offshore Technology Conference Asia, 22-25 March, Kuala Lumpur, Malaysia
- Publication Date
- Document Type
- Conference Paper
- 2016. Offshore Technology Conference
- 5.2.2 Fluid Modeling, Equations of State, 4.1 Processing Systems and Design, 4.1.2 Separation and Treating, 5 Reservoir Desciption & Dynamics, 5.2 Fluid Characterization, 4.1.5 Processing Equipment, 4 Facilities Design, Construction and Operation
- Oil-Water Separator, Oil-Water Two-Phase Flow, Numerical Simulation, Novel Design, Unified Model
- 1 in the last 30 days
- 206 since 2007
- Show more detail
- View rights & permissions
Numerous oil wells, especially in their middle-late periods, are becoming less economic due to the high lifting costs and reduced recoveries. The downhole oil-water separation (DOWS) system is aimed to lower the production cost, reduce the environment impact, and enhance the oil recovery. However, current separators are of either poor separation effects or poor separation efficiencies.
In this paper, a novel oil-water separator design is proposed based on the combination of two different flow resistance mechanisms and pipe serial-parallel theory, with the restrictive path restricting the heavier water, while the frictional path impeding the more viscous oil. Based on the combination of the flow pattern transformation criterion, homogenous model, two-fluid model, and pipe serial-parallel theory, a unified model of oil-water two-phase flow is developed to predict both the flow rate and water content distributions in different paths, which is then compared with the computational fluid dynamics (CFD) results. Unlike the CFD results, each path has a specific flow rate and water content, and as a consequence, specific flow regime and flow pattern.
Both the CFD and model results show that the flow distributions in different paths of the separator will be adjusted automatically according to the fluid's property, while the model can also predict the water content distributions at the same time. And the average relative error for flow distribution is 17.71%, while that for water content distribution is 32.66%. Specifically, oil, being more viscous, mainly takes the restrictive path; while water, being heavier, tends to take the frictional path instead. To sum up, this autonomous function directs oil and water to different paths, hence oil and water is well separated.
|File Size||3 MB||Number of Pages||21|
Abdulagatov, I.M., Akhmedova-Azizova, L.A., Azizov, N.D., 2014. Experimental Study of the Density and Derived (Excess, Apparent, and Partial Molar Volumes) Properties of Binary Water + Ethanol and Ternary Water + Ethanol + Lithium Nitrate Mixtures at Temperatures from 298 K to 448 K and Pressures up to 40 MPa. J. Fluid Phase Equilibria. 376(25), 1-21. doi: 10.1016/j.fluid.2014.05.032.
Alhoni, M.A., Jerbi, K.K., Drawil, T.A., Zekri, A.Y., 2003. Application of Downhole Oil-Water Separation: A Feasibility Study. Paper SPE 80485 present at the SPE Asia Pacific Oil and Gas Conference and Exhibition, 9-11 September, Jakarta, Indonesia. doi: 10.2118/80485-MS.
Alshmakhy, A., Maini, B.B., 2012. Foamy-Oil-Viscosity Measurement. J. Journal of Canadian Petroleum Technology. 51(01), 60-65. doi: 10.2118/136665-PA.
Atmaca, S., Sarica, C., Zhang, H.Q., Al-Sarkhi, A.S., 2009. Characterization of Oil/Water Flows in Inclined Pipes. J. SPE Projects, Facilities & Construction. 4(2), 41-46. doi: 10.2118/115485-PA.
Belaidi, A., Thew, M.T., Munaweera, S.J., 2003. Hydrocyclone Performance with Complex Oil-Water Emulsions in the Feed. J. Canadian Journal of Chemical Engineering. 81(6), 1159-1170. doi: 10.1002/cjce.5450810605.
Blanco, A.E., Davies, D.R., 2001. Technical & Economic Application Guidelines for Downhole Oil-Water Separation Technology. Paper SPE 67182 present at the SPE Production and Operations Symposium held in Oklahoma City, Oklahoma, 24-27 March. doi: 10.2118/67182-MS.
Decarre, S., Fabre, J., 1997. Phase Inversion Prediction Study. J. Oil & Gas Science and Technology-Revue de L Institute Francais du Prtrole. 52(4), 415-424. doi: 10.2516/ogst:1997050.
Denney, D., 2003. Insights into Water Control: A Review. Journal of Petroleum Technology. 55(3), 61-62. doi: 10.2118/0303-0061-JPT.
Denney, D., 2004. Ultradeepwater Gravity-Based Separators. J. Journal of Petroleum Technology. 56(6), 37-41. doi: 10.2118/0604-0037-JPT.
Duong, P.H.H., Chung, T.S., 2014a. Application of Thin Film Composite Membranes with Forward Osmosis Technology for the Separation of Emulsified Oil-Water. J. Journal of Membrane Science. 452, 117-126. doi: 10.1016/j.memsci.2013.10.030.
Duong, P.H.H., Chung, T.S., 2014b. Highly Permeable Double-Skinned Forward Osmosis Membranes for Anti-Fouling in the Emulsified Oil-Water Separation Process. J. Environmental Science & Technology. 48(8), 4537-4545. doi: 10.1021/es405644u.
Fernandez, L.G., Soria, C.O., Garcia Tourn, C.A., Izquierdo, M.S., 2001. The Study of Oil/Water Separation in Emulsion by Membrane Technology. Paper SPE 69554 present at the SPE Latin American and Caribbean Petroleum Engineering Conference held in Buenos Aires, Argentina, 25-28 March. doi: 10.2118/69554-MS.
Frankiewicz, T., Lee, C.M., Juniel, K., 2005. Compact Induced Gas Flotation as an Effective Water Treatment Technology on Deep Water Platforms. Paper OTC 17612 present at the Offshore Technology Conference held in Houston, Texas, 5 February. doi: 10.4043/17612-MS.
Freitas, S.V.D., Segovia, J.J., Martin, M.C., Zambrano, J., Oliveira, M.B., Lima, A.S., Coutinho, J.A.P., 2014, Measurement and Prediction of High-Pressure Viscosities of Biodiesel Fuels. J. Fuel. 122(15), 223-228. doi: 10.1016/j.fuel.2014.01.031.
Gomez, C., Caldentey, J., Wang, S., Gomez, L., Mohan, R., Shoham, O., 2001. Oil-Water Separation in Liquid-Liquid Hydrocyclones (LLHC) - Experiment and Modeling. Paper SPE 71538 present at the SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, 30 September - 3 October. doi: 10.2118/71538-MS.
Gomez, C., Caldentey, J., Wang, S., Gomez, L., Mohan, R., Shoham, O., 2002. Oil/Water Separation in Liquid/Liquid Hydrocyclones (LLHC): Part 1 - Experimental Investigation. J. SPE Journal. 7(4), 353-372. doi: 10.2118/81592-PA.
Gundigdu, M.Y., Kutlar, A.I., Duz, H., 2009. Analytical Prediction of Pressure Loss through a Sudden-Expansion in Two-Phase Pneumatic Conveying Lines. J. Advanced Powder Technology. 20(1), 48-54. doi: 10.1016/j.apt.2008.02.001.
Hussein, A.M.O., Amin, R.A.M., 2010. Density Measurement of Vegetable and Mineral Based Oil Used in Drilling Fluids. Paper SPE 136974 present at the Nigeria Annual International Conference and Exhibition held in Tinapa - Calabar, Nigeria, 31 July - 7 August. doi: 10.2118/136974-MS.
Joe, S., 1982. Design of a High-Rate, High-Volume Oil/Water Separator. J. Journal of Petroleum Technology. 34(11), 2637-2644. doi: 10.2118/8307-PA.
Jokhio, S.A., Berry, M.R., Bangash, Y.K., 2002. DOWS (Downhole Oil-Water Separation) Cross-Waterflood Economics. Paper SPE 75273 present at the SPE/DOE Improved Oil Recovery Symposium held in Tulsa, Oklahoma, 13-17 April. doi: 10.2118/75273-MS.
Kenawy, F.A., Kandil, M.E., Fouad, M.A., Aboarab, T.W., 1997. Produced Water Treatment Technology, A Study of Oil/Water Separation in Gravity Type Cross Flow Pack Separators for Qualitative Separation. J. SPE Production & Facilities. 12(2), 112-115. doi: 10.2118/36056-PA.
Lee, C.M., Frankiewicz, T., 2004. Developing Vertical Column Induced Gas Flotation for Floating Platforms Using Computational Fluid Dynamics. Paper SPE 90201 present at the SPE Annual Technical Conference and Exhibition held in Houston, Texas, 26-29 September. doi: 10.2118/90201-MS.
Leech, C.A., Radhakrishnan, S., Hillyer. M.J., Degner, V.R., 1978. Performance Evaluation of Induced Gas Flotation (LGF) Machine through Math Modeling. Paper OTC 3342 present at the Offshore Technology Conference held in Houston, Texas, 8-11 May. doi: 10.4043/3342-MS.
Leech, C.A., Radhakrishnan, S., Hillyer. M.J., Degner, V.R., 1980. Performance Evaluation of Induced Gas Flotation Machine through Mathematical Modeling. J. Journal of Petroleum Technology. 32(1), 48-58. doi: 10.2118/7246-PA.
Lockwood, W.H., Norris, R.O., 1971. Use of a Gravity Type Oil Separator for Tanker Operations. International Oil Spill Conference Proceedings. 1971(1), 109-117. doi: 10.7901/2169-3358-1971-1-109.
Meldrun, N., 1988. Hydrocyclones: A Solution to Produced-Water Treatment. J. SPE Production Engineering. 3(4), 669-676. doi: 10.2118/16642-PA.
Minzer, U., Barnea, D., Taitel, Y., 2006. Flow Rate Distribution in Evaporating Parallel Pipes - Modeling and Experimental. J. Chemical Engineering Science. 61(22), 7249-7259. doi: 10.1016/j.ces.2006.08.026.
Ouyang, L.B., Aziz, K., 2000. A Homogenous Model for Gas-Liquid Flow in Horizontal Wells. J. Journal of Petroleum Science and Engineering. 27(3-4), 119-128. doi: 10.1016/S0920-4105(00)00053-X.
Padaki, M., Surya, M.R., Abdullah, M.S., Misdan, N., Moslehyani, A., Kassim, M.A., Hilai, N., Ismail, A.F., 2015. Membrane Technology Enhancement in Oil-Water Separation. A review. J. Desalination. 357, 197-207. doi: 10.1016/j.desal.2014.11.023.
Peachey, B.R., 1997. The Economics of Downhole Oil/Water Separation. Paper PETSOC-97-92 present at the Annual Technical Meeting held in Calgary, Alberta, 8-11 June. doi: 10.2118/97-92.
Peachey, B.R., Matthews, C.M., 1994. Downhole Oil/Water Separator Development. J. Journal of Canadian Petroleum Technology, 33(7), 17-21. doi: 10.2118/94-07-01.
Sharma, A., Al-Sarkhi, A., Sarica, C., Zhang, H.Q., 2011. Modeling of Oil-Water Flow using Energy Minimization Concept. J. International Journal of Multiphase Flow. 37(4), 326-335. doi: 10.1016/j.ijmultiphaseflow.2010.11.002.
Shi, H., Holmes, J.A., Durlofsky, L.J., Aziz, K., Diaz, L., Alkaya, B., Oddie, G., 2005. Drift-Flux Modeling of Two-Phase Flow in Wellbores. J. SPE Journal. 10(1), 135-145. doi: 10.2118/84228-PA.
Simoes, E.F., Carneiro, J.N.E., Nieckele, A.O., 2014. Numerical Prediction of Non-Boiling Heat Transfer in Horizontal Stratified and Slug Flow by the Two-Fluid Model. J. International Journal of Heat and Fluid Flow. 47, 135-145. doi: 10.1016/j.ijheatfluidflow.2014.03.005.
Stuebinger, L.A., Elphingstone, G.M., 1998. Multipurpose Wells: Downhole Oil Water Separation in Your Future. Paper SPE 49050 present at the SPE Annual Technical Conference and Exhibition held in New Orleans, Louisiana, 27-30 September. doi: 10.2118/49050-MS.
Stuebinger, L.A., Elphingstone, G.M., 2000. Multipurpose Wells: Downhole Oil/Water Separation in the Future. J. SPE Production & Facilities, 15(3), 191-195. doi: 10.2118/65071-PA.
Yan, K.L., Guo, K., Sun, C.Y., Niu, S.S., Liu, B., Shen, D.J., Chen, J., Zhong, R.Q., Chen, G.J., Li, Q.P., 2014. Experimental and Modeling Studies on the Viscosity of (Diesel Oil + Water + Anti-Agglomerant) System at High Pressures. J. Fluid Phase Equilibria. 377(15), 9-15. doi: 10.1016/j.fluid.2014.06.012.