7.5.2 Data Model

The wellbore marker (Figure 7.5.2-1) is a top-level data object that can optionally be assembled into a set of wellbore markers. It has these key characteristics:

• Contains this basic information:

• Chronostratigraphic top, which is a reference to the geochronological unit of the wellbore geology object (see 6.1.2 Geological Interpretation (InterpretedGeologyInterval)).
• Lithostratigraphic top, which is a reference to the lithostratigraphic unit of the wellbore geology object (see 6.1.2 Geological Interpretation (InterpretedGeologyInterval)).
• TVD, dip angle and direction.

• Optionally references a wellbore and/or trajectory data object.

Figure 7.5.2-1 UML diagram of the wellbore marker and wellbore marker set objects.