The measurement of some of the physical properties of the soils and rocks penetrated by bore holes provides information of value to the soil engineer. Electrical resistivity, radiation, and acoustical properties are particularly useful. The measurements continuously recorded in terms of depths give a detailed log on which geological and physical changes are indicated. In a typical case, the field operations are conducted as follows: (1) A small number of test wells scattered over the area of interest are drilled, cored, and logged with one or several appropriate probes; (2) additional holes are then drilled between the test wells; and (3) these holes are logged but not cored. By correlating the logs and the core data the geology of the area and some of the rock properties can be mapped. None of the methods reviewed, however, can be used to measure dynamic properties. The main advantages of geophysical logs are that detailed information is readily obtained at the well sites and at a lower cost than if each hole were cored. The equipment used for the logging of shallow holes is small, light, rugged and simple. No special technician is needed for its operation.

The first edition of this book demystified the process of well log analysis for students, researchers and practitioners. In the two decades since, the industry has changed enormously: technical staffs are smaller, and hydrocarbons are harder to locate, quantify, and produce. New drilling techniques have engendered new measurement devices incorporated into the drilling string. Corporate restructuring and the "graying" of the workforce have caused a scarcity in technical competence involved in the search and exploitation of petroleum. The updated 2nd Edition reviews logging measurement technology developed in the last twenty years, and expands the petrophysical applications of the measurements.

The scope of engineering seismology includes geotechnical site investigations for buildings and engineering infrastructures, such as dams, levees, bridges, and tunnels, landslide and active-fault investigations, seismic microzonation, and geophysical investigations of historic buildings. These projects require multidisciplinary participation by the geologist, geophysicist, and geotechnical and earthquake engineers. A key objective of this book (SEG Investigations in Geophysics Series No. 17) by Öz Yilmaz is to encourage the specialists from these disciplines to apply the seismic method to solve the many challenging engineering problems they face. The broader scope of engineering seismology also includes exploration of earth resources, including groundwater exploration, coal and mineral exploration, and geothermal exploration. While focusing on the application of the seismic method to geotechnical site investigations, this book includes many case studies in all of the applications of engineering seismology.

The first edition of this book demystified the process of well log analysis for students, researchers and practitioners. In the two decades since, the industry has changed enormously: technical staffs are smaller, and hydrocarbons are harder to locate, quantify, and produce. New drilling techniques have engendered new measurement devices incorporated into the drilling string. Corporate restructuring and the "graying" of the workforce have caused a scarcity in technical competence involved in the search and exploitation of petroleum. The updated 2nd Edition reviews logging measurement technology developed in the last twenty years, and expands the petrophysical applications of the measurements.

This book is intended for Earth science specialists using geophysical methods, which are applicable to both reservoir studies and civil engineering. In each chapter, the reader will find theoretical concepts, practical rules and, above all, concrete examples of applications. For this reason, the book can be used as a text to accompany course lectures or continuing education seminars.Contents: 1. Methodology for the study of geotechnical problems. 2. From the petroleum field to civil engineering. 3. Theoretical overview of seismic and acoustic techniques. 4. Reflection seismic. 5. Refraction seismic. 6. Well seismic. 7. Acoustic logging. 8. Examples of hydrocarbon field and civil engineering studies. 9. Radar. 10. Role of well logging in geotechnics. 11. Logging and soil mechanics. Bibliography. Index.