Geological Well Logs

Their Use in Reservoir Modeling

About

Well logging has come a long way from the simple electrical devices of the early years. Today's tools are not only much more accurate but much more diverse in their applications. Among these are tools that characterize geological properties of rocks in the borehole in a way that was previously only possible with oriented cores. Thus, borehole imaging, nuclear spectroscopy, nuclear magnetic resonance, and paleomagnetic logging provide precise information about bedding, mineralogy, texture, and age of the rocks traversed by a borehole. Many of these logs can not only be acquired in the traditional "wireline" mode, but also in logging-while-drilling mode where the sensors are placed directly behind the drill bit, and the measurements are transmitted in real-time to the surface. Combined with new technology to drill deviated wells, the geoscientist now has tools which allow him to characterize and develop reservoirs more accurately than ever. This book, written for researchers, graduate students and practising geoscientists, documents these techniques and illustrates their use in a number of typical case studies.

Content

3-11Overview
12-20History of Logging
21-34The Petrophysical Approach
37-73Dipmeter
74-123Electrical Borehole Imaging
124-146Acoustic Borehole Imaging
147-153Density Borehole Imaging
154-158Optical Borehole Imaging
159-182Nuclear Magnetic Resonance Logging
183-215Nuclear Spectroscopy Logging
216-235Paleomagnetic Logging
236-244Core Sampling
247-258Structural Modeling
259-296Bedding and Reservoir Zonation
297-316Fractured Reservoir Analysis
317-341Well Correlation
342-357Geological Drilling
358-363Conclusions