Formation Evaluation with Pre-Digital Well Logs

Formation Evaluation with Pre-Digital Well Logs covers the practical use of legacy materials for formation evaluation using wireline logging equipment from 1927 until the introduction of digital logging in the 1960s and ‘70s. The book provides powerful interpretation techniques that can be applied today when an analyst is faced with a drawer full of old “E logs." It arms the engineer, geologist and petrophysicist with the tools needed to profitably plan re-completions or in-fill drilling in old fields that may have been acquired for modern deeper and/or horizontal drilling.

• Includes more than 150 figures, log examples, charts and graphs
• Provides work exercises for the reader to practice log analysis and formation evaluation
• Presents an important source for academia, oil and gas professionals, service company personnel and the banking and asset evaluation teams at consultancies involved in reserve and other property evaluation

Geologists, Geophysicists, Exploration Geologists, Log Analysts, Petrophysicists. Economists, Managers, Bankers, Reserve Estimators and Certifiers

Section I The Mechanics of reading old E-Log paper prints
1. Introduction
2. Applications

Section II Sources for Rt & Rxo
3. Resistivity Logging Tools

Section III Sources for Porosity
4. Sonic
5. Count-Rate Neutron
6. Gamma Gamma (Uncompensated) Density
7. Sidewall (Epithermal) Neutron and Compensated (Thermal) Neutron
8. Microlog
9. SP

Section IV Saturation Determination and Archie Alternatives
10. Rocky Mountain Method
11. Pickett and Hingle Plots
12. Log Analysis in Empty holes
13. Quick-look Methods (Rwa, F-Overlay)

Section V Permeability Estimates
14. Timur, Wyllie and Rose, Resistivity Gradients and SP

Section VI Lithology
15. Neutron, Density and Sonic Crossplots, Gamma Ray and SP

Section VII Miscellaneous
16. Dipmeter
17. Formation Tester
18. Early Computer Processed Interpretations (CPI)