摘要

In this study, an analytical model was derived to determine the wellbore temperature profiles for heavy oil production assisted with the addition of light oil from the annulus in production wells. The derivation of the temperature profile model was conducted on the basis of energy balance between the formation and fluids flowing through each conduit in vertical wells. The temperature profiles in different cases were calculated using the proposed temperature model and the results were compared with the measured data. Sensitivity analysis was also conducted and the main factors that influence the temperature profiles were discussed.