Prerequisite: Introductory calculus, physics, chemistry, thermodynamics. Fundamental laws of thermodynamics and their applications to subsurface reservoirs especially to hydrocarbon reservoirs. Bulk-phase equilibrium thermodynamics with cubic equations of state, in particular, the Peng-Robinson equation of state. Detailed calculation procedures to predict volumetric properties, gas and liquid phase compositions, thermal properties and sonic velocities of reservoir fluids. Algorithms for flash calculation and stability analyses. Interfacial thermodynamics and irreversible thermodynamics with applications to subsurface reservoirs.