What you should know about borehole images but were afraid to ask…..Forty years of hard-won lessons’ By Lawrence Bourke
Lawrence Bourke of Task Fronterra Geoscience, one of the founders of image log interpretation, took us on a trip down memory lane, back to the embryonic beginnings of image logs with the with the original 8 button high resolution dipmeter of 40 years ago through the revolution (for geologists) of the high-resolution FMS and FMI micro-resistivity devices in the late 1980s and early 1990s at the PESA WA April technical luncheon. Some of us recall the revelation that the FMS and FMI borehole images provided the geological community. Unfortunately, a propensity for the use of oil-based muds for the last couple of decades has meant that the image log technology has had to reinvent itself. But the ground has been regained.
Lawrence gave us a run down on the latest range of measurements (sonic, density, induction, capacitance, electromagnetics, passive nuclear), tools and technology now on offer and a look at developments for the future. A very informative presentation.
Summary by Mark Fittall
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