This book on petroleum engineering deals with the theoretical and technical aspects of petroleum exploration and extraction. Reservoir engineering is the primary methodology that is implemented in the extraction of crude oil. Modern technology in this field seeks to be cost-effective, environmentally friendly and efficient in petroleum recovery. The use of computer technology for reservoir design and hydraulic fracturing are other modern innovations in this field. The various advancements in petroleum engineering are glanced at and their applications as well as ramifications are looked at in detail. Different approaches, evaluations and methodologies in this field have been included in this book. Students, researchers, experts and all associated with petroleum engineering will benefit alike from this book.