Abstract
In heavy oil production, the loss of energy to ambient surroundings decreases the temperature of the heavy oil flowing upwards in a vertical wellbore, which increases the oil viscosity and the oil may not flow normally in the wellbore. Therefore, it is necessary to lower the heavy oil viscosity by heating methods to allow it to be lifted easily. Heating of heavy oil in an oil well is achieved by circulating hot water in annuli in the well (tubing-casing annulus, casing-casing annulus). In this paper, based on heat transfer principles and fluid flow theory, a model is developed for produced fluids and hot water flowing in a vertical wellbore. The temperature and pressure of produced fluids and hot water in the wellbore are calculated and the effect of hot water on heavy oil temperature is analyzed. Calculated results show that the hot water circulating in the annuli may effectively heat the heavy oil in the tubing, so as to significantly reduce both oil viscosity and resistance to oil flow.
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References
Alves I N, Alhantl F J S and Shoham O. A unified model for predicting flowing temperature distribution in wellbores and pipelines. SPE Production Engineering. 1992. 7(4): 363–367 (paper SPE 20632)
Beggs H D and Brill J P. A study of two-phase flow in inclined pipes. Journal of Petrology Technology. 1973. 25(5): 607–617
Brown K E. The Technology of Artificial Lift Methods. Pennwell Books, Tulsa, Oklahoma. 1984
Chen C G, Guo J X, Wang H Y, et al. Synthesis and evaluation of an oil-soluble viscosity reducer for heavy oil. Petroleum Science. 2010. 7(4): 536–540
Chen J L. Petroleum Gas-liquid Two-Phase Pipe Flow. Beijing: Petroleum Industry Press. 1989. 99–105 (in Chinese)
Chiu K and Thakur S C. Modeling of wellbore heat losses in directional wells under changing injection conditions. SPE Annual Technical Conference and Exhibition, 6–9 October 1991, Dallas, Texas (paper SPE 22870)
Danilović D S, Karović-Maričić V D and Čokorilo V B. Solving paraffin deposition problem in tubing by heating cable application. Thermal Science. 2010. 14(l):247–253
Feng S C and Guo K C. Oil and Gas Production and Processing. Dongying: University of Petroleum Press. 2006. 87–90 (in Chinese)
Jurak M and Prnić Z. Heating of oil well by hot water circulation. Proceedings of the Conference on Applied Mathematics and Scientific Computing. 2005. 13(2): 235–244
Li S Y, Li Z M, Li B F, et al. Modeling of lifting heavy oil assisted by enclosed thermal fluid circulation in hollow rod. Journal of Petroleum Science and Engineering. 2010. 75(1–2): 135–142
Lin R Y, Liang J G, Yang D W, et al. Viscosity reduction technology by closed hot water circulation in hollow sucker rods. Journal of China University of Petroleum (Edition of Natural Science). 2010. 34(3): 104–108 (in Chinese)
Manabe R, Wang Q and Zhang, H Q. A mechanistic heat-transfer model for vertical two-phase flow. SPE Annual Technical Conference and Exhibition, 5–8 Oct 2003, Denver, Colorado (paper SPE 84226)
Prats M. The effect of heat transfer between nearby layers on the volume of steam zones. SPE Journal. 2002. 7(2): 221–230 (paper SPE 71869)
Ramey H J. Wellbore heat transmission. Journal of Petroleum Technology. 1962. 14(4): 427–435
Ren Y, Liang J G and Yang S H. The Theory and Practice of Heavy and High Pour Point Oil Heat Production. Beijing: Petroleum Industry Press. 2001. 1–13 (in Chinese)
Wan R P. Petroleum Engineering Manual. Beijing: Petroleum Industry Press. 2008. 105–179 (in Chinese)
Yang S M and Tao W Q. Heat Transfer (4th Edition). Beijing: Higher Education Press. 2006. 41–56 (in Chinese)
Zhang Q and Wan R P. Project Design of Oil Production Engineering. Beijing: Petroleum Industry Press. 2002. 8–10 (in Chinese)
Zhang Q. Principle and Design of Oil Production Engineering. Dongying: University of Petroleum Press. 2006. 141–146 (in Chinese)
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Lin, R., Wang, F. & Wang, X. Heating of heavy oil by circulating hot water in closed double casing in ultra-deep wells. Pet. Sci. 9, 506–510 (2012). https://doi.org/10.1007/s12182-012-0235-4
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DOI: https://doi.org/10.1007/s12182-012-0235-4