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Summary Immiscible CO2 floods with alternating water injection are promising for heavy-oil formations ill-suited for thermal treatment. This investigation uses scaled models to show that a 20% PV slug of CO2 can recover 5 to 50% of the oil in place (OIP), depending on the operating conditions. The CO2 requirement is small, < 100 std m3/stock-tank m3.
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Rojas et al. (1991) studied this question.
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