Petroleum prospecting is an art. The search for petroleum requires a multi-disciplinary approach. The various geological, geophysical and geochemical surveys, point towards the most probable geographical locations, favorable geological structures, depositional environments, and time periods for hydrocarbon accumulations. Therefore, an encyclopedia is required which covers all the disciplines of upstream (E & P). The aim of these eleven volumes is to make the interconnections among the different disciplines of exploration geophysics, production, transportation, storing, etc. These volumes of “Encyclopedia of Petroleum Science and Engineering” will help to promote understanding and communication among users. These volumes are suitable for geophysicists, geologists, scientists and other working in different disciplines of petroleum science and engineering. These volumes will serve to readers and users as reference books.