This helpful training manual describes the role of improved recovery, the production of oil not recoverable by conventional primary production methods, in U.S. oil production.The book introduces four improved recovery methods--waterflooding, injection, chemical flooding, and thermal recovery.It also provides a nontechnical description of the subsurface processes by which these methods displace oil, and evaluates their development and use.Readable language, clearly labeled illustrations and photographs, a glossary, and helpful self-test review questions aid the reader in comprehending the material.