| 摘要 |
In a CO2 miscible displacement enhanced oil recovery process, produced CO2-hydrocarbon gas containing from more than the maximum CO2 content tolerable in a fuel gas up to about 70 volume percent CO2 is reinjected into a small portion of the well pattern volume and produced CO2-hydrocarbon gas containing more than 70 volume percent CO2 is reinjected into a larger portion of the well pattern volume. The method provides a more effective utilization of CO2 in a CO2 miscible enhanced oil recovery process while maintaining most of the oil-containing formation under miscible conditions.
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