“…Polymer flooding (Needham and Doe, 1987;Sheng, 2011;Sorbie, 1991), polymer in-situ gel flooding (Abdo et al, 1984;Avery et al, 1986;Kabir, 2001;Kim May, 1995;Norman et al, 2006;Seright and Liang, 1994;Seright et al, 2003;Sydansk and Southwell, 2000), and polymer microgel flooding (Al- Anazi and Sharma, 2002;Chauveteau et al, 2001;Coste et al, 2000;Cozic et al, 2009;Frampton et al, 2004;Mack and Smith, 1994;Spildo et al, 2009;Zaitoun et al, 2007) are three distinct improved oil recovery techniques, and it is important to be able to differentiate them from each other. Before proceeding with this distinction, a few key terms need be briefly defined.…”