| Popis: |
Foam propagation in co-injection was studied in a 10 m long porous medium, equipped with pressure ports for every 1 m. The porous medium had been characterized by flooding experiments on the core scale. In the absence of oil, propagation on the 10 m scale could be understood by corescale, steady-state foam properties. In the presence of oil, however, the foam front propagated significantly slower than the injected fluid front. An extraction mechanism for oil combined with foam oil sensitivity can explain the delayed propagation. These effects were included in a foam simulator that reproduced the slow foam propagation. |
