Research on wellbore heat and mass transfer of steamsoaking horizontal wellbore in oil production

Less study is conducted on wellbore temperature distribution in heavy oil production process, although wellbore mathematical models in steam injection process have been improved a lot in China. By applying the discretizing wellbore model, a model of cyclic steamsoaking of single horizontal wells is establised. Firstly, by means of the law of conservation of mass, the law of conservation of momentum and the principle of conservation of energy, the model of wellbore pressure, temperature distribution and liquid production prediction of horizontal wells are established. Then using the numerical method, corresponding program for calculation is established, of which the credibility is verified using the well data obtained from Shengli Oilfield. The new model provides theoretical basis for productivity prediction and production systerm optimization.