Well Logging for Earth Scientists ebook is available to be downloaded here now.
- Title: Well Logging for Earth Scientists
- Author: Darwin V. Ellis and Julian M. Singer
- Publisher: Springer
- Pages: 699
Twenty years ago, the objectives of the first edition of this book were numerous and ambitious: to demystify the process of well log analysis; to examine the physical basis of the multitude of geophysical measurements known collectively as well logging; to clearly lay out the assumptions and approximations routinely used to extract petrophysical information from these geophysical measurements; to expose the vast range of well logging instrumentation and techniques to the larger geophysical community. Finally, the important goal was to provide a textbook for university and graduate students in Geophysics and Petroleum Engineering, where none suitable had been available before.
What’s different twenty years later? First, Well Logging for Earth Scientists is long out of print. The petroleum industry, the major consumer of the geophysical information known as well logging, has changed enormously: technical staffs have been slashed, and hydrocarbons have become increasingly harder to locate, quantify, and produce. In addition, new techniques of drilling high deviation or horizontal wells have engendered a whole new family of measurement devices incorporated into the drilling string that may be used routinely or in situations where access by traditional “wireline” instruments is difficult or impossible. Petroleum deposits are becoming scarce and demand is steadily increasing. Massive corporate restructuring and the “graying” of the workforce have caused the technical competence involved in the search and exploitation of petroleum to become scarce. Although we only attempt to address this latter scarcity with our textbook, the objectives are still ambitious.
In this thorough updating of the text, we have attempted to include all of the new logging measurement technology developed in the last twenty years and expand the measurements’ petrophysical applications. As in the first edition, we are primarily concerned with logging techniques that lead to formation evaluation but mention a few other applications where appropriate. We also trace the historical development of the technology as a means of better understanding it. Throughout, large sections of the text have been set in italics, which the casual reader may skip. These detailed sections may be of more interest to researchers. The goals of providing a graduate-level textbook as well as a useful handbook for any practicing earth scientist (geophysicist, geologist, petroleum engineer, petrophysicist) remain.