Those in the petroleum industry as well as secondary users in banking, geology, and related fields for the logs created of oil wells will find this a useful guide. The second edition has been revised to reflect advances in logging techniques. The text contains many diagrams, photos, and sample logs for illustration as it describes topics that include the use and reading of logs, formation parameters, mud logging, resistivity management, porosity measurements, computer-generated log interpretations, and techniques for water saturated sites. Annotation c. Book News, Inc., Portland, OR.