Glossary

Accelerometer

Accelerometer correction

Acoustic borehole imaging

Apparent dip

Automatic dips/computed dips

Azimuth plot

Azimuth vector plot

Azimuth versus dip plot

Bedding surfaces

Bit size

Borehole breakout

Borehole image

Borehole ovalisation (elongation)

Borehole sampling bias

Button

Calipers

Curve saturation

Density and photoelectric effect imaging devices

Depth of investigation

Dessication cracks

De-spiking

Dip, true dip

Dip histogram

Dip orientation nomenclature

Dip plot

Dip rotation (subtraction)

Dip quality

Dog-leg

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

Electrical radius and diameter

Floating pad

Fracture aperture, hydraulic aperture

Fracture (fault) set

Frowns and smiles

Geographical North Pole or True North

Hesthammer grid

High side

Hole orientation

Hurley plots

Image artefacts

Image polarity

In-situ stress

Key seating

Magnetic declination

Magnetic inclination

Magnetic North

Magnetometer

Manual dips

Mean direction, mean orientation

Mirror image dips

Mudcake (filter cake or wallcake)

Mud/mud type/drilling fluid

Pad

Pad 1 azimuth

Pad pressure

Poles to planes

Pipe conveyed logging

Relative bearing (RB)

Resistivity imaging devices

Rose diagram

Rugose hole

Speed button(s)

SCAT plots

Sine waves

Spiral hole

Stereonets

Stick and pull

Strike

Stick plots

Structural dip

Swing arm correction

Tadpole plots

Tangent diagram

Tool face, gravity tool face, magnetic tool face

Tool marks

Tool spin

Total depth (TD)

True stratigraphic thickness (TST)

True vertical depth (TVD)

Vertical resolution

Washout