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- W2354817965 abstract "In light of the physical model for heavy oil recovery in offshore horizontal wells,and considering the linear change of air,sea water and formation temperature along the direction of vertical depth,the mathematical model of wellbore temperature calculation was established according to the principle of energy conservation and heat transfer. With bottomhole oil temperature as the initial condition of equation,the fourth-order Runge-Kutta algorithm was adopted to conduct a numerical solution. The calculation of three wells in some offshore oilfield was carried out. The findings show that the calculation result is very close to the measured data,verifying the accuracy of the model and solution. The effects of the parameters such as oil well production,water content,thermal conductivity coefficient and running depth of the tubing on wellhead oil temperature were analyzed. With the running depth of heat insulated tubing as the target and with produced fluid's temperature higher than deparaffinning temperature as the constraint,the optimal design model of heat insulated string was established. The simple-shooting was introduced to solve the optimum model. The findings show that the model prediction precision is high. Design of the running depth of heat insulated tubing will be helpful to improving oil flow velocity in the precondition of maximum material saving,avoiding shaft paraffinning. This is of great significance to the economical recovery of crude oil." @default.
- W2354817965 created "2016-06-24" @default.
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- W2354817965 date "2014-01-01" @default.
- W2354817965 modified "2023-09-24" @default.
- W2354817965 title "Calculation of Offshore Oil Production Wellbore Temperature and Optimal Design of Heat-proof String" @default.
- W2354817965 hasPublicationYear "2014" @default.
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