Fig. 4

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The apparatus for core flooding experiments. (1) ISCO pump; (2) Gas intermediate container; (3) Liquid intermediate container; (4) Back pressure regulator; (5) Heat exchangers; (6) Valve; (7) Foam generator; (8) Pressure transducer; (9) Natural core; (10) Back pressure regulator; (11) Gas–liquid separator; (12) Oven.