9Greaves M. Air injection-improved oil recovery strategy for the UK continental shelf[M] // Exploration & Production: The Oil & Gas Review 2004, London : Touch Briefings, 2005 : 118-121.
10Bergeron V, Fagan M E, Radke C J. Generalized entering coefficients:A criterion for foam stability against oil in porous media [J]. Langmuir, 1993,9(7) :1704-1713.