Synopsis 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 encyclopaedia is required which covers all the disciplines and upstream (E and P). The aim of these volumes is to make the interconnections among the different disciplines of exploration geophysics, geology, geoscience, drilling engineering, production, transportation, storing, etc. These volumes of "Encyclopaedia of Petroleum Science and Engineering" will help to promote understanding and communication among users. These volumes are suitable fro geophysicists, geologists, scientists, universities, organizations, teachers, students and other working in different disciplines of petroleum science and engineering. These volumes will serve to readers and users as reference books.