Restricted to geosystems engineering and hydrogeology and petroleum engineering majors. Introduction to reservoir displacement processes; water and gas injection; enhanced recovery. Three lecture hours a week for one semester. Offered on the letter-grade basis only. Prerequisite: Credit with a grade of at least C- for Mathematics 427J or 427K, Petroleum and Geosystems Engineering 311 (or 310), 322K, 323K, and 424.