Abstract
In this study, produced natural gas reinjection process is proposed to form renewed foamy oil for heavy oil recovery. A new experimental procedure was developed to prove that an in situ foamy oil could be formed during the gas injection process. A field scale numerical study was performed to further analyze foamy oil behavior and its influential mechanisms. The study showed that natural gas huff-n-puff process could increase heavy oil recovery by inducing foamy oil. The findings of this study could be useful to solve the problem of disappearance of foamy oil mechanism.
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