This book gives a comprehensive overview of the basic principles, practice, and application of an eclectic technology in the oil and gas industry. It covers fundamental operations, work scope definitions, execution methods, mathematical calculations, field applications, core subjects, diversities, introduction to petroleum economics/project management concepts, and strategies, which is the primary link between decision making and profitable operations. Topics discussed in the chapters are carefully structured with interactive pictorial illustrations where necessary to benefit all interested readers.This book: Offers a comprehensive overview of the basics, principles, practice and application of a creative and eclectic technology. Explores basics and latest developments in geology, exploration, leasing, drilling, production, transportation, refining, and so forth. Serves as a conduit between college education and the real-world petroleum/natural gas engineering practice. Discusses technical content of improvements in computer modeling, materials and the application of statistics and probability analysis. Includes detailed explanations and illustrations, especially for non-petroleum engineers. This book is aimed at professionals and researchers in petroleum and natural gas engineering.