Abstract: On the basis of model for prediction of conventional heavy oil reservoir performance by steam stimulation process, adopting energy balance theory, this paper presents a model for prediction of fractured heavy oil reservoir performance by steam stimulation process, providing analytical solutions under thermal expansion, segregation drive and capillary imbibition processes. During the solutions, effects of temperature on viscosity, oil saturation and oil-water relative permeability are taken consideration. The results between case estimation and numerical simulation using this model are similar, showing that the model can be applied for prediction of fractured heavy oil reservoir performance by steam stimulation process.

Key words: fracture, heavy oil reservoir, steam stimulation, prediction, model