We have studied steamdrive in layered reservoirs with scaled laboratory experiments. In spite of the frequent occurrence of stratification we have found no reference to previous laboratory studies of steamdrive in thin layered structures. The scaled transparent model was designed to investigate the influence of viscous, gravitational and capillary forces as well as the heat transfer mechanisms. Temperatures are measured by thermocouples and an infrared camera. Heat transfer rates to adjacent formations are measured by heat flux sensors. Visual observations make it possible to follow the evolution of the steam condensation front (SCF), which separates the steam zone from the liquid zone.

We have interpreted the results with an interface model. The interface model combines heat losses to the adjacent rock and fluid flow without the introduction of empirical relations for the SCF, which is essential to describe the behaviour in layered systems. For gravity stable situations the interface model is not valid but in this case a simpler model is adequate. We show the agreement between theory and experiments.

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