Rock mechanics is a vital decision-making tool for insuring economic benefits in all phases of petroleum reservoir development. Petroleum Rock Mechanics introduces the fundamentals of solid mechanics and applies them to oil and gas related drilling and well operation and completion problems. The book's two part treatment starts with a clear and rigorous exposition of theory, followed by self-contained chapters concerning applications for understanding the stress, strain, and failure mechanics of rocks and their response to earth stresses. The role of rock mechanics in drilling operations and design are highlighted throughout. Details of practical in-situ stress changes and how they impact on wellbore and borehole behaviour are also included, making this the one of most unique books on the subject.