Fundamentals of well-log interpretation . 1 The acquisition of logging data / / O. Serra ; translated from the French by Peter Westaway and Haydn Abbott

• Record Nr.: UNINA9911006888503321
• Autore: Serra Oberto
• Pubbl/distr/stampa: Amsterdam ; ; New York, : Elsevier, 1984
• ISBN: 1-281-77828-1; 9786611778286; 0-08-086869-X
• Descrizione fisica: 1 online resource (xii, 423 pages) : illustrations
• Collana: Developments in petroleum science ; ; 15A
• Altri autori (Persone): SerraOberto
• Disciplina: 622.18282; 622/.18282 19; 622.3382
• Soggetti: Oil well logging; Petroleum engineering
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Translation of: Diagraphies differees.
• Nota di bibliografia: Includes bibliographical references.
• Nota di contenuto: Front Cover; Fundamentals of Well-log Interpretation; Copyright Page; Contents; Preface; Foreword to the French edition; Foreword to the English edition; Chapter 1. Review of basic concepts; 1.1. The definition of a "" well-log''; 1.2. The importance of well-logs; 1.3. The definition of rock composition; 1.4. Rock texture and structure; 1.5. Conclusions; 1.6. References; Chapter 2. Logging techniques and measurements; 2.1. Classification of log measurements; 2.2. Problems specific to well-log measurements; 2.3. Loggng equipment-surface and downhole; 2.4. Log presentation; 2.5. Repeatability and calibrations; 2.6. Data transmission; 2.7. References; Chapter 3. The measurement of resistivity; 3.1. Introduction; 3.2. Non-focused long-spacing tools; 3.3. Focused long-spacing tools; 3.4. Non-focused microtools: the microlog (ML); 3.5. Focused microtools; 3.6. Conclusions; 3.7. References; Chapter 4. The spontaneous potential-SP; 4.1. The origin of the electrokinetic potential; 4.2. The origin of the electrochemical potential; 4.3. Ionic activity concentration and resistivity; 4.4. The static SP; 4.5. Amplitude ; and shape of SP peaks; 4.6. Geology and the SP; 4.7. Applications; 4.8. References; Chapter 5. An introduction to nuclear logs; 5.1. Definition; 5.2. Recording capability; 5.3. Statistical variations; 5.4. Dead-time; 5.5. Logging speed; 5.6. Bed thickness; 5.7. Measuring point; 5.8. References; Chapter 6. Measurement of the nature1 gamma radioactivity; 6.1. Definition natural radioactivity; 6.2. Basic concepts; 6.3. The origin of natural radioactivity in rocks; 6.4. Minerals and rocks containing radioactive elements; 6.5. Measurement of gamma radiation; 6.6. Measuring point; 6.7. Radius of investigation; 6.8. Vertical definition; 6.9. Factors affecting the gamma-ray response; 6.10. Applications; 6.11. Calibration; 6.12. References; Chapter 7. Natural gamma-ray spectrometry; 7.1. Principles; 7.2. Tool description; 7.3. Detector; 7.4. Calibration; 7.5. Radius of investigation; 7.6. Fundamental factors influencing the measurement; 7.7. Computation of Th U and K content; 7.8. Filtering; 7.9. Applications; 7.10. Environmental and other effects; 7.11. References; Chapter 8. Neutron logs; 8.1. General; 8.2. Measurement of the apparent hydrogen index; 8.3. References; Chapter 9. Induced gamma-ray spectrometry; 9.1. Early capture gamma-ray spectrometry- the chlorine log; 9.2. Modern induced gamma-ray techniques-inelastic and capture spectrometry; 9.3. References; Chapter 10. Thermal decay time measurements; 10.1. Background theory; 10.2. Tool principle; 10.3. Neutron source; 10.4. Detectors; 10.5. Spacing; 10.6. Units; 10.7. Calibration (see Appendix 5); 10.8. Measure points; 10.9. Vertical resolution; 10.10. Depth of investigation; 10.11. Factors influencing the Z measurement; 10.12. Environmental effects; 10.13. Geological factors affecting the Z measurement; 10.14. Porosity and gas indication; 10.15. Applications