This book uses a descriptive style on how to practically carry out reservoir simulations, written by a seasoned practicing simulation engineer. Mathematical development is kept to a minimum since this is covered in depth in many books and the literature. In particular, the author shows how to link geology and simulation inputi?1/2the most critical aspect of successful reservoir simulation. The book covers all of the fundamental techniques that are unique to reservoir simulation, such as pseudo relative permeability. The second half of the book describes advanced studies, compositional modelling, hydraulically fractured and horizontal wells, EOR processe and thermal simulation with a heavy emphasis on steam assisted gravity drainage (SAGD).