Over 1000 people have attended the three-day course on which this book is based since it was instituted in 1981 by JAPEC (Joint Association for Petroleum Exploration Courses). Key topics covered in this book are: the underlaying rationale for exploration; essential basic geological and geophysical exploration techniques; drilling and logging wells; an outline of reservoir geology and what constitutes reserves; and all of these topics are brought together in acase-history overview of exploration in the North Sea. The book is fully self-explanatory, needs no prior knowledge of geology or of exploration techniques, and as much as possible avoids the use of technical jargon. There is, however, a lengthy glossary of technical terms that can be used as a reference. The appeal of the book extends far beyond theaudience originally envisaged for the JAPEC course. Anyone interested in finding out what petroleum exploration is all about will enjoy this volume.