Defining enhanced oil recovery (EOR), enhanced gas recovery (EGR) and enhanced coalbed methane recovery (ECBM). Reasons for EOR/EGR/ECBM. Screening of reservoirs for selection of EOR/EGR/ECBM methods. Sweep and displacement efficiency. Estimating trapped oil saturation. Decreasing residual oil saturation by miscible/near-miscible/immiscible gas injection processes. Controlling mobility at the field scale by polymer flooding and by water-alternating-gas (WAG) injection. Increasing oil mobility by thermal methods of cyclic steam stimulation, steamdrive, and in-situ combustion. Miscible displacement of CH4 by CO2 in depleted gas reservoirs. Displacing CH4 in coal seams by N2 and CO2. Co-optimisation of EOR/EGR/ECBM and CO2. Understanding the role of commercial reservoir simulators in field applications of EOR/EGR/ECBM a teamwork project.