| POSC Specifications Version 2.2 | Epicentre Logical Data Model |
The terminal formation of a drilled borehole may be reported as a lithostrat or chronostart or sometimes other geologic features. A modification to the model is required for changing the destination entity of the attribute wellbore.terminal_formation to point to a rock-feature instead of being restricted to a lithostratigraphic_unit: In wellbore: terminal_formation (O: rock_feature) The rock feature within which the wellbore terminates.
Consolidated changes: (1049)
Change ERDs to reflect new relationships and deleted entities. See change request 1216 for details of added relationships and entities.
Modified objects:
EMG1:_Geologic_Features (Diagram)
WI1:_Well_and_Wellbore (Diagram)
WO2:_Wellbore_Survey_and_Targets (Diagram)
Remove relationships from wellbore to drilling_imposed_target, geologic_target and lithostratigraphic_unit (deleted as part of change request 450). Remove relationship between field and geologic_target. Delete entity drilling_imposed_target and entity geologic_target.
Deleted objects:
geologic_target (Entity)
drilling_imposed_target (Entity)
wellbore.terminal_formation (Attribute)
field.geologic_target (Attribute)
wellbore.geologic_target (Attribute)
wellbore.drilling_imposed_target (Attribute)