抄録
For successful application of forward in-situ combustion to recover additional oil, oil must have the property to form sufficient amount of coke by thermal cracking. This was believed to lead the criterion that the oil must be heavy, to some extent.
However, our combustion tube experiments showed that Yabase crude oil were suitable to the in-situ combustion, due to the formation of w/o emulsion, with the consumption of only 5% of initial oil in place.
Also, experimental results on the behavior of in-situ combustion after recovering oil by air injection showed that the production began at three hours after the initiation of ignition with high production rates of oil lasted about eight hours, followed by the sudden decrease of production rates at the end of oil production in the oil bank.
Numerical calculations with our new 4 phase 8 component model which included the mechanism of emulsion formation and the flow characteristics of emulsion simulated well the experimental results described above.
