Duncan Cogswell

Borehole Imaging – Optical Scanner – Overview

Borehole Imaging - Optical Scanner - Overview.   Application: The optical scanner is a high resolution CMOS camera borehole imaging probe which is commonly run in combination with an acoustic scanner for detailed, high resolution images of the borehole through...

Dual Laterolog (Focused Resistivity) Logging – Overview

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...

Dual Induction-Conductivity Logging – Environmental Contamination

Dual Induction-Conductivity Logging - Environmental Contamination Project: Rehabilitation of old industrial land is common place today for future land re-use. Shallow drilling and geophysical borehole logging is common practise to map the location of subsurface...

Dual Laterolog (Focused Resistivity) Logging – Overview

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...

Dual Induction-Conductivity Logging – Overview

Dual Induction-Conductivity Logging – Overview

Dual Induction-Conductivity Logging - Overview   Application: Induction-conductivity logging involves the measurement of induced electromagnetic fields in the rock and resulting eddy currents. Changes in the rock’s electrical properties can be due to the clay...