Well Logging for Earth Scientists

1. Front Matter

   Pages i-xix

   PDF

2. An Overview of Well Logging

   • Darwin V. Ellis, Julian M. Singer

   Pages 1-15

3. Introduction to Well Log Interpretation: Finding the Hydrocarbon

   • Darwin V. Ellis, Julian M. Singer

   Pages 17-39

4. Basic Resistivity and Spontaneous Potential

   • Darwin V. Ellis, Julian M. Singer

   Pages 41-62

5. Empiricism: The Cornerstone of Interpretation

   • Darwin V. Ellis, Julian M. Singer

   Pages 63-89

6. Resistivity: Electrode Devices and How They Evolved

   • Darwin V. Ellis, Julian M. Singer

   Pages 91-123

7. Other Electrode and Toroid Devices

   • Darwin V. Ellis, Julian M. Singer

   Pages 125-148

8. Resistivity: Induction Devices

   • Darwin V. Ellis, Julian M. Singer

   Pages 149-177

9. Multi-Array and Triaxial Induction Devices

   • Darwin V. Ellis, Julian M. Singer

   Pages 179-212

10. Propagation Measurements

    • Darwin V. Ellis, Julian M. Singer

    Pages 213-245

11. Basic Nuclear Physics for Logging Applications: Gamma Rays

    • Darwin V. Ellis, Julian M. Singer

    Pages 247-266

12. Gamma Ray Devices

    • Darwin V. Ellis, Julian M. Singer

    Pages 267-288

13. Gamma Ray Scattering and Absorption Measurements

    • Darwin V. Ellis, Julian M. Singer

    Pages 289-324

14. Basic Neutron Physics for Logging Applications

    • Darwin V. Ellis, Julian M. Singer

    Pages 325-349

15. Neutron Porosity Devices

    • Darwin V. Ellis, Julian M. Singer

    Pages 351-382

16. Pulsed Neutron Devices and Spectroscopy

    • Darwin V. Ellis, Julian M. Singer

    Pages 383-414

17. Nuclear Magnetic Logging

    • Darwin V. Ellis, Julian M. Singer

    Pages 415-478

18. Introduction to Acoustic Logging

    • Darwin V. Ellis, Julian M. Singer

    Pages 479-498

19. Acoustic Waves in Porous Rocks and Boreholes

    • Darwin V. Ellis, Julian M. Singer

    Pages 499-530

20. Acoustic Logging Methods

    • Darwin V. Ellis, Julian M. Singer

    Pages 531-571

Twenty years ago, the objectives of the ?rst edition of this book were numerous and ambitious:todemystifytheprocessofwellloganalysis;toexaminethephysicalbasis of the multitude of geophysical measurements known collectively as well logging; to clearly lay out the assumptions and approximations routinely used to extract pet- physical information from these geophysical measurements; to expose the vast range of well logging instrumentation and techniques to the larger geophysical community. Finally,therewastheimportantgoalofprovidingatextbookforuniversityandgra- atestudents inGeophysics andPetroleum Engineering, wherenone suitablehad been available before. What’s different twenty years later? First of all, 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 dif?cult 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 are only attempting to address this latter scarcity with our textbook, the objectives are still ambitious.

• Formation Evaluation
• Geophysics
• Logging while drilling
• Petroleum prospecting
• Petrophysics
• Well logging
• instruments
• nuclear physics
• spectroscopy

• Schlumberger-Doll Research, Ridgefield, USA

  Darwin V. Ellis

• Richmond, UK

  Julian M. Singer

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