12.13.4 StnTrajCorUsed

Topic Version1Published11/11/2016
For StandardWITSML v2.0
Type:ClassStereotype:«XSDcomplexType»

Captures information about corrections applied to a trajectory station.

Table 12.13.4-1 Attributes

Name

Type

Notes

DirSensorOffset

LengthMeasure

Offset relative to the bit.

GravAxialAccelCor

LinearAccelerationMeasure

Calculated gravitational field strength correction.

GravTran1AccelCor

LinearAccelerationMeasure

The correction applied to a cross-axial (direction 1) component of the Earth's gravitational field.

GravTran2AccelCor

LinearAccelerationMeasure

The correction applied to a cross-axial (direction 2) component of the Earth's gravitational field.

MagAxialDrlstrCor

MagneticFluxDensityMeasure

Axial magnetic drill string correction.

MagAxialMSACor

MagneticFluxDensityMeasure

Axial magnetic correction due to a multi-station analysis process.

MagTran1DrlstrCor

MagneticFluxDensityMeasure

Cross-axial (direction 1) magnetic correction.

MagTran1MSACor

MagneticFluxDensityMeasure

Cross-axial (direction 1) magnetic correction due to a multi-station analysis process.

MagTran2DrlstrCor

MagneticFluxDensityMeasure

Cross-axial (direction 2) magnetic correction.

MagTran2MSACor

MagneticFluxDensityMeasure

Cross-axial (direction 2) magnetic correction due to a multi-station analysis process.

SagAziCor

PlaneAngleMeasure

Calculated cosag correction to the azimuth.

SagIncCor

PlaneAngleMeasure

Calculated sag correction to the inclination.

StnGridConUsed

PlaneAngleMeasure

The angle used to correct a true north referenced azimuth to a grid north azimuth. WITSML follows the Gauss-Bomford convention in which convergence angles are measured positive clockwise from true north to grid north (or negative in the anti-clockwise direction). To convert a true north referenced azimuth to a grid north azimuth, the convergence angle must be subtracted from true north. If this value is not provided, then GridConUsed applies to all grid-north referenced stations.

StnMagDeclUsed

PlaneAngleMeasure

Magnetic declination used to correct a Magnetic North referenced azimuth to a True North azimuth. Magnetic declination angles are measured positive clockwise from True North to Magnetic North (or negative in the anti-clockwise direction). To convert a Magnetic azimuth to a True North azimuth, the magnetic declination should be added.

Table 12.13.4-2 Associations

Association

Notes

From: TrajectoryStation.CorUsed

0..1To: StnTrajCorUsed

Association

Applies only to measured magnetic stations.