Glossary

Accelerometer correction

Acoustic borehole imaging

Automatic dips/computed dips

Azimuth vector plot

Azimuth versus dip plot

Bedding surfaces

Borehole breakout

Borehole ovalisation (elongation)

Borehole sampling bias

Curve saturation

Density and photoelectric effect imaging devices

Depth of investigation

Dessication cracks

Dip orientation nomenclature

Dip rotation (subtraction)

Drilling induced tension fractures (tension fractures, induced fractures & hydraulic fractures)

Electrical radius and diameter

Fracture aperture, hydraulic aperture

Fracture (fault) set

Frowns and smiles

Geographical North Pole or True North

Hesthammer grid

Hole orientation

Image artefacts

Magnetic declination

Magnetic inclination

Mean direction, mean orientation

Mirror image dips

Mudcake (filter cake or wallcake)

Mud/mud type/drilling fluid

Poles to planes

Pipe conveyed logging

Relative bearing (RB)

Resistivity imaging devices

Speed button(s)

Swing arm correction

Tangent diagram

Tool face, gravity tool face, magnetic tool face

Total depth (TD)

True stratigraphic thickness (TST)

True vertical depth (TVD)

Vertical resolution