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Details

Named Semantic Graph


Name
Impact of earth curvature
Goal
Convey TVD depth uncertainty
Description
When surveying with an inclinometer, the inclination angle is relative to the vertical defined by the gravitational field. But when surveying with a gyro, the inclination is relative to the initial vertical before running the gyro. (A. Brooks, SPE-116155-PA)

Statements


Subject Subject Category Predicate Object Object Category
Trajectory #1 DDQUD.Drilling.Trajectory belongs to Current Operation #1 DDQUD.Drilling.ActualOperation
Wellbore #1 DDQUD.Drilling.WellBore has a Trajectory #2 DDQUD.Drilling.Trajectory
Trajectory #2 DDQUD.Drilling.Trajectory is measured using Survey instrument gyro based #2 DDQUD.Drilling.SurveyInstrument
Distance log #1 DDQUD.Drilling.RealTimeSignal is estimated using Trajectory #2 DDQUD.Drilling.Trajectory
Wellbore #1 DDQUD.Drilling.WellBore has a Trajectory #1 DDQUD.Drilling.Trajectory
Trajectory #2 DDQUD.Drilling.Trajectory is extended to Bottom Hole Depth #1 DDQUD.Drilling.WellDepth
Trajectory #1 DDQUD.Drilling.Trajectory is measured using Survey instrument gravity based #1 DDQUD.Drilling.SurveyInstrument
Distance log #1 DDQUD.Drilling.RealTimeSignal is estimated using Trajectory #1 DDQUD.Drilling.Trajectory
Trajectory #1 DDQUD.Drilling.Trajectory is extended to Bottom Hole Depth #1 DDQUD.Drilling.WellDepth
Trajectory #2 DDQUD.Drilling.Trajectory belongs to Current Operation #1 DDQUD.Drilling.ActualOperation

Nodes


Node Name Node Category URI
Trajectory #1 DDQUD.Drilling.Trajectory
Current Operation #1 DDQUD.Drilling.ActualOperation
Wellbore #1 DDQUD.Drilling.WellBore
Trajectory #2 DDQUD.Drilling.Trajectory
Trajectory #2 DDQUD.Drilling.Trajectory
Survey instrument gyro based #2 DDQUD.Drilling.SurveyInstrument
Distance log #1 DDQUD.Drilling.RealTimeSignal
Trajectory #2 DDQUD.Drilling.Trajectory
Wellbore #1 DDQUD.Drilling.WellBore
Trajectory #1 DDQUD.Drilling.Trajectory
Trajectory #2 DDQUD.Drilling.Trajectory
Bottom Hole Depth #1 DDQUD.Drilling.WellDepth
Trajectory #1 DDQUD.Drilling.Trajectory
Survey instrument gravity based #1 DDQUD.Drilling.SurveyInstrument
Distance log #1 DDQUD.Drilling.RealTimeSignal
Trajectory #1 DDQUD.Drilling.Trajectory
Trajectory #1 DDQUD.Drilling.Trajectory
Bottom Hole Depth #1 DDQUD.Drilling.WellDepth
Trajectory #2 DDQUD.Drilling.Trajectory
Current Operation #1 DDQUD.Drilling.ActualOperation

Plain english description

Trajectory #1 is of type DDQUD.Drilling.Trajectory
Current Operation #1 is of type DDQUD.Drilling.ActualOperation
Trajectory #1 belongs to Current Operation #1
Wellbore #1 is of type DDQUD.Drilling.WellBore
Trajectory #2 is of type DDQUD.Drilling.Trajectory
Wellbore #1 has a Trajectory #2
Survey instrument gyro based #2 is of type DDQUD.Drilling.SurveyInstrument
Trajectory #2 is measured using Survey instrument gyro based #2
Distance log #1 is of type DDQUD.Drilling.RealTimeSignal
Distance log #1 is estimated using Trajectory #2
Wellbore #1 has a Trajectory #1
Bottom Hole Depth #1 is of type DDQUD.Drilling.WellDepth
Trajectory #2 is extended to Bottom Hole Depth #1
Survey instrument gravity based #1 is of type DDQUD.Drilling.SurveyInstrument
Trajectory #1 is measured using Survey instrument gravity based #1
Distance log #1 is estimated using Trajectory #1
Trajectory #1 is extended to Bottom Hole Depth #1
Trajectory #2 belongs to Current Operation #1

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Survey instrument gyro based #2 Distance log #1 Current Operation #1 Bottom Hole Depth #1 Survey instrument gravity based #1 Trajectory #1 Trajectory #2 Wellbore #1 is estimated using is estimated using belongs to is measured using is extended to is measured using is extended to belongs to has a has a