7.5 Wellbore Markers Data Object (formerly Formation Marker)

Knowledge of rock formations is vital input to assessing the total and recoverable volume of hydrocarbons, and for effective drilling operations. Some of this data is gathered while drilling wells. For example, a break in continuity of a formation when observed passing through different wells indicates structural discontinuities in the subsurface and might indicate potential faults/folds, which may be structural traps. Similarly the lithology in different types of subsurface formations provides information about potential stratigraphic traps.

The wellbore markers object (WellboreMarkers) (which was Formation Marker in v1.4.1) is used to capture information about geologic formations that were encountered in a wellbore. This data is typically captured during drilling using logging while drilling (LWD) tools.