By: Darwin V Ellis and Julian M Singer
550 pages, 450 illus
Well logging lies at the intersection of applied geophysics, petroleum and geotechnical engineering. It has its roots in the tentative electrical measurements in well bores which were made by the Schlumberger brothers some 80 years ago in the earliest days of systematic petroleum exploration. Today, a variety of specialized instruments is used to obtain measurements from the borehole during, as well as after, the drilling process.This readable and authoritative treatment of the physics of these measurements dispels the "black magic" of well log interpretation by relating them, including those obtained by the latest generation of tools, to rock physics. It offers a thorough expose of the physical basis of borehole geophysical measurements, as well as an introduction to practical petrophysics - extracting desired properties from well log measurements. "Well Logging for Earth Scientists, 2nd edition", is thoroughly revised and extended with three new chapters, many new illustrations and expanded and updated references in each chapter. ("The Solution Manual" will be available from this website soon).
Preface.- 1. An overview of Well Logging.- 2. Introduction to Well Log Interpretation.- 3. Basic Resistivity and Spontaneous Potential.- 4. Empiricism: The Cornerstone of Interpretation.- 5. Resistivity: Electrode Devices and How They Evolved.- 6. Other Electrode and Toroid Devices.- 7. Resistivity: Induction Devices.- 8. Multi-array and Triaxial Induction Devices.- 9. Propagation Measurements.- 10. Basic Nuclear Physics for Logging Applications.- 11. Gamma Ray Devices.- 12. Gamma Ray Scattering and Absorption Measurements.- 13. Basic Neutron Physics for Logging Applications.- 14. Neutron Porosity Devices.- 15. Pulsed Neutron Devices and Spectroscopy.- 16. Nuclear Magnetic Logging.- 17. Introduction to Acoustic Logging.- 18. Acoustic Waves in Porous Rocks and Boreholes.- 19. Acoustic Logging Methods.- 20. High Angle and Horizontal Wells.- 21. Clay Quantification.- 22. Lithology and Porosity Estimation.- 23. Saturation and Permeability Estimation.- Index.
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