Dual Laterolog (Focused Resistivity) Logging Overview. Application: Resistivity logging involves the measurement of electrical properties of the rock. Changes in the rock’s electrical properties can be due to the clay mineral content, water content and...
<h4>Nuclear Magnetic Resonance NMR - Near Surface Applications</h4> A nuclear magnetic resonance (NMR) borehole logging technique has been developed for near surface mining, groundwater and environmental contamination projects. The NMR technique provides a...
<h4>Why use the services of a logging contractor?</h4> Geophysical borehole logging is a standard service in the mining, geotechnical, hydrogeological and environmental fields producing in situ physical rock properties rapidly and cost effectively. The...
Borehole Imaging: Acoustic Scanner (Televiewers) versus 3 or 4 arm dipmeter. The acoustic scanner and 3 or 4 arm dipmeter probes have been used for coal exploration for a long time. It would be fair to say that the acoustic scanner has superseded the 3 or 4 arm...
<h4>Borehole Geophysics in Universities</h4> Should more attention be given to borehole geophysics in undergraduate geology and/or geophysics courses? <h4>Borehole Geophysics</h4> Borehole Geophysics (also known as geophysical logging, downhole...
<h4>Managed Aquifer Recharge Schemes</h4> An interesting presentation at a recent groundwater forum showed the increasing popularity (in the arid conditions of South Australia – a necessity) of Managed Aquifer Recharge schemes. <h4>What is...
Deconvolution of gamma logs Deconvolution is a common process in seismic process where the objective is to “sharpen” the seismic response at depth. The process is necessary as the earth through which the seismic source pulse travels is altered by the rocks which act...
The need for integrity and compliance testing of local water wells has been highlighted in a recent groundwater forums to halt the loss of a valuable resource whether through age of the well or poor installation procedures. <h4>What is the problem?</h4>...
<h4>Soil Moisture and Contaminant Plumes</h4> An interesting presentation at a recent groundwater forum emphasised the importance of soil moisture in the distribution of contaminant vapour plumes particularly TCE. <h4>Relevance to Adelaide...
<h4>Caliper logging</h4> The caliper probe, a simple mechanical device, whose main functionality is to measure the internal diameter of a borehole or casing string within a borehole. Another purpose of a caliper arm is to push a section of a probe against...