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6Garcia D G, Prioletta A, Kruse G F. Effective control of vertical fracture growth by placement of an artificial harrier (Bottom Screen Out) in an exploratory well[R]. SPE 69578,2001.
7Nguyen H X, Larson D B. Fracture height containment by crea ting an artificial barrier with a new additive[R]. SPE 12061, 1983.