Mud logging is the creation of a detailed record (well log) of a borehole by examining the cuttings of rock brought to the surface by the circulating drilling medium (most commonly drilling mud). Mud logging is usually performed by a third-party mud logging company.
Mud logging is typically carried out by a third-party company that creates an in-depth record (well log) of a borehole, using rock cuttings retrieved from the drilling fluid (most commonly mud).