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Details
Named Semantic Graph
- Name
- Drilling inform G&G Personnel about TVD uncertainty from ground level
- Goal
- Convey TVD uncertainty in reference to ground level
- Description
- Tabulations of well survey data is typically to 2 decimal places when the uncertainty, at deeper depths, is in whole meters / feet and multiples thereof. This is misleading to the end user and subsurface modelling (especially cross correlation of pressures) suffers badly. A common representation of uncertainty on shared TVD data is needed to ensure end users take into account the real uncertainty
Statements
| Subject | Subject Category | Predicate | Object | Object Category |
|---|---|---|---|---|
| Trajectory #3 | DDQUD.Drilling.Trajectory | belongs to | Current Operation #1 | DDQUD.Drilling.ActualOperation |
| Trajectory #4 | DDQUD.Drilling.Trajectory | is estimated using | Confidence Factor #1 | DDQUD.Drilling.ConfidenceFactor |
| Wellbore #1 | DDQUD.Drilling.WellBore | has a | Trajectory #2 | DDQUD.Drilling.Trajectory |
| Trajectory #1 | DDQUD.Drilling.Trajectory | has lower vertical bound | Trajectory #4 | DDQUD.Drilling.Trajectory |
| Trajectory #3 | DDQUD.Drilling.Trajectory | is extended to | Section TD #1 | DDQUD.Drilling.WellDepth |
| Trajectory #5 | DDQUD.Drilling.Trajectory | is estimated using | Confidence Factor #1 | DDQUD.Drilling.ConfidenceFactor |
| Trajectory #2 | DDQUD.Drilling.Trajectory | belongs to | Current Operation #1 | DDQUD.Drilling.ActualOperation |
| Wellbore #1 | DDQUD.Drilling.WellBore | has a | Trajectory #1 | DDQUD.Drilling.Trajectory |
| Wellbore #1 | DDQUD.Drilling.WellBore | has a | Trajectory #3 | DDQUD.Drilling.Trajectory |
| Trajectory #1 | DDQUD.Drilling.Trajectory | has higher vertical bound | Trajectory #5 | DDQUD.Drilling.Trajectory |
| Trajectory #1 | DDQUD.Drilling.Trajectory | belongs to | Planned Operation #1 | DDQUD.Drilling.PlannedOperation |
Nodes
Plain english description
| Trajectory #3 is of type DDQUD.Drilling.Trajectory |
| Current Operation #1 is of type DDQUD.Drilling.ActualOperation |
| Trajectory #3 belongs to Current Operation #1 |
| Trajectory #4 is of type DDQUD.Drilling.Trajectory |
| Confidence Factor #1 is of type DDQUD.Drilling.ConfidenceFactor |
| Trajectory #4 is estimated using Confidence Factor #1 |
| Wellbore #1 is of type DDQUD.Drilling.WellBore |
| Trajectory #2 is of type DDQUD.Drilling.Trajectory |
| Wellbore #1 has a Trajectory #2 |
| Trajectory #1 is of type DDQUD.Drilling.Trajectory |
| Trajectory #1 has lower vertical bound Trajectory #4 |
| Section TD #1 is of type DDQUD.Drilling.WellDepth |
| Trajectory #3 is extended to Section TD #1 |
| Trajectory #5 is of type DDQUD.Drilling.Trajectory |
| Trajectory #5 is estimated using Confidence Factor #1 |
| Trajectory #2 belongs to Current Operation #1 |
| Wellbore #1 has a Trajectory #1 |
| Wellbore #1 has a Trajectory #3 |
| Trajectory #1 has higher vertical bound Trajectory #5 |
| Planned Operation #1 is of type DDQUD.Drilling.PlannedOperation |
| Trajectory #1 belongs to Planned Operation #1 |