Basic concepts of origin, accumulation and recovery of hydrocarbon fluids. Fluid properties, PVT behaviour and classification of hydrocarbon reservoirs. Material balance equations for gas cap, solution gas, depletion and water drive reservoirs, and gas reservoirs. Reservoir rock properties and core analysis procedures, porosity-permeability relationships. Darcy's law for linear and radial flow, steady-state and pseudo steady-state flow. Wellbore damage, skin-factor and well productivity. Horizontal wells. Wettability, capillary pressure and vertical distribution of reservoir fluids.