Abstract: Temperature pattern in circulation phase of SAGD process is studied. Two in-situ points, three-dimensional heat conduct and partial penetration of horizontal well into reservoirs, are considered. The model is processed by dimensionless treatment, Laplace transformation, separation of variables and Stehfest numerical inversion. The results are in accordance with simulations by CMG software which verifies accuracy of the model. It shows relationship between temperature and heating time and concludes that the smaller the radial distance, the less the time is needed. Calculation plate can be helpful to design heating time and amount of heat.

Key words: heat conduction, Laplace transformation, SAGD circulation phase, temperature distribution

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