Prediction of wellbore pressure and temperature distribution in the pumping wells producing high pour point oil

Based on the concept of the considerable diameter,applying the Mukherjee-Brill method to drawdown calculation of gas-fluid biphase conduit flow to predict pressure of pumping wellbore,taking into account the Joule-Thomson coefficient and the fluid convection heat transfer of the casing annulus,banding oil PVT data of Shen84-An12 block of Shenyang oil field together,an integrated mathematical model was formulated to predict pressure and temperature distribution of wellbore multiphase fluid simultaneously in pumping wells producing high pour point oil.The model was implemented using iteration method and an application software was developed related to the model.Further,the model was revised using field measured data and a calculation example was then given.The results show that the fluid convection heat transfer factor of the casing annulus in gas column should fix 17 W/(m2·℃),and fluid column part 29 W/(m2·℃);the proposed model achieves a good performance with high accuracy,relative error within 10%,and could predict the pressure and temperature distribution of multiphase fluid excellently in the pumping wells producing high pour point oil.