Petroleum Science >2012, Issue 4: 506-510 DOI: https://doi.org/10.1007/s12182-012-0235-4
Heating of heavy oil by circulating hot waterin closed double casing in ultra-deep wells Open Access
文章信息
作者：Lin Riyi,Wang Fangzheng and Wang Xinwei
作者单位：
College of Pipeline and Civil Engineering, China University of Petroleum (East), Qingdao, Shandong 266580, China;College of Pipeline and Civil Engineering, China University of Petroleum (East), Qingdao, Shandong 266580, China;College of Pipeline and Civil Engineering, China University of Petroleum (East), Qingdao, Shandong 266580, China
投稿时间：2012-02-01
引用方式：Lin, R., Wang, F. & Wang, X. Pet. Sci. (2012) 9: 506. https://doi.org/10.1007/s12182-012-0235-4
文章摘要
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.
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.
关键词
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Heavy oil, double casing, hot water injection, viscosity reduction