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Research on viscosity reduction by electric heating technology in ultra-deep flowing well in Tahe Oilfield
LIN Ri-yi1,2,LI Zhao-min1,DONG Bin3,LI Xin-yong3,TAN Hong-qi2,MA Pei-xin4
(1.College of Petroleum Engineering in China University of Petroleum , Dongying 257061, Shandong Province, China;2. College of Transport & Storage and Civil Engineering in China University of Petroleum ,Dongying 257061, Shandong Province, China;3. Northwest Branch Company of China Petrochemical Corporation, Urumchi 830011, China;4. Zhenhua Oil Limited Company, Beijing 100031, China)
Abstract:
In order to solve the problem that the fluid flowing is hard because of the ultra-deep reservoir, high oil viscosity and great wellbore heat loss in Tahe Oilfield,the flow and heat transfer models of the fluid flowing along the wellbore were established using electric heating to reduce the viscosity on the basis of heat transfer principle and two-phase flow theory. The temperature and pressure sections of the fluid flowing along the wellbore were calculated. The influences of the different producing parameters on the electric heating effect were analyzed. The viscosity reduction effect of a heavy oil wdl was analyzed using the electric heating technology by this model, and the oil viscosity adaptability of the electric heating technology was confirmed in Tahe Oilfield. The results show that the maximum oil viscosity is 30 Pas using the electric heating technology, which will be helpful to the application of the technology.
Key words:  wellbore  electric heating  viscosity reduction  adaptability  Tahe Oilfield