This book focuses on the applications of geophysics in addressing petroleum engineering problems. It explores the complementary features of geophysical techniques in better understanding, characterizing, producing and monitoring reservoirs. The objective of this book is to introduce engineers to geophysical methods so that they can communicate their needs to the geophysicists with whom they work, and appreciate the full benefits of the results they receive from them. Fundamentals of geophysical techniques, their physical basis, their applications and limitations as well as possible pitfalls in their misuse are described. Case study examples are presented to illustrate the integration of geophysical data and various other data types for predicting and describing reservoir rocks and fluid properties. The examples are from different parts of the world, with a larger number of case histories from the fields in the Middle East. Introduces geophysical methods to engineers Helps understanding, characterizing, producing and monitoring of geophysical techniques Updates the changing needs of reservoir engineering.