The mechanics of fluid flow is one of the most important fundamental engineering disciplines explaining both natural phenomena and human-induced processes. A group of some of the best-known petroleum engineers in the world give a thorough understanding of this important field, central to the operations of the oil and gas industry. The mechanics of fluid flow, specifically gas, oil, and water, is a fundamental engineering discipline explaining various natural phenomena and human-induced processes. It is of utmost importance in aviation, shipbuilding, petroleum industries, thermodynamics, meteorology, and chemical engineering. This basic applied scientific discipline enables one to understand and describe mathematically the movement of fluids (gas, oil, water) in various media: channels, subsurface formations, pipelines, etc. To describe various phenomena and applications associated with fluid dynamics, the writers used the unified systematic approach based on the continuity and conservation laws of continuum mechanics. There have been many books written on the basics of fluid flow or fluid mechanics, but this volume, written by some of the most well-respected engineers and scientists in the oil and gas industry, is the first of its kind to apply these fundamental concepts to problems encountered in the petroleum industry at this level of detail. Mathematical description of specific applied problems and their solutions are presented in the book, as well as the concepts behind them, both traditional and newly conceived ideas that will be of use to scientists and students alike. This book can be used as a textbook by the university student, or as a handbook for the engineer or scientist in the field. This groundbreaking new volume includes: More efficient oil & gas production for the petroleum engineer and petroleum geologist. * More accurate forecasting for the environmental engineer. * Real-world examples for the engineering student. * Valuable new information not available anywhere else.