Name of the Geologic Unit or formation in which the well is completed (opened for hydrocarbon production or other operation).
If more than one formation is included in a single Completion Interval, the completion interval is subdivided into separate intervals, one covering each formation completed, and each interval is represented by a separate record in the Completion Intervals Subtable.
The term "formation" is used in the common petroleum industry vernacular and does not necessarily denote formal stratigraphic nomenclature.