The book begins with a reservoir engineering primer that makes information accessible to geologists, geophysicists, and hydrologists, and serves as a review for petroleum engineers. The second part of the volume, covering modeling principles, has been substantially revised and updated since the first edition.The simulator, WINBD4, is a version of the first edition's BOAST4D flow simulator, modified for use in a Windows operating environment with a dynamic memory management system that expands the applicability of the program. It also includes a visualization feature that provides a 3D perspective of the reservoir.