29.21.17 WellDatum

Code

WellboreDatumReference

The code value that represents the type of reference datum. This may represent a point on a device (e.g., kelly bushing) or it may represent a vertical reference datum (e.g., mean sea level).

DefaultElevation

boolean

True indicates that this is the default reference datum for elevation coordinates. False or not given indicates that this is not the default reference datum. Elevation coordinates that do not specify a datum reference should be assumed to be measured relative to the default reference datum. Only one reference datum may be designated as the default elevation datum for each well. Values are "true" (or "1") and "false" ( or "0").

DefaultMeasuredDepth

boolean

True indicates that this is the default reference datum for measured depth coordinates. False or not given indicates that this is not the default reference datum. Measured depth coordinates that do not specify a datum reference should be assumed to be measured relative to this default reference datum. Only one reference datum may be designated as the default measured depth datum for each well. Values are "true" (or "1") and "false" ( or "0").

DefaultVerticalDepth

boolean

True indicates that this is the default reference datum for vertical depth coordinates. False or not given indicates that this is not the default reference datum. Vertical depth coordinates that do not specify a datum reference should be assumed to be measured relative to the default reference datum. Only one reference datum may be designated as the default vertical depth datum for each well. Values are "true" (or "1") and "false" ( or "0").

Kind

String64

Since various activities may use different points as measurement datums, it is useful to characterize the point based on its usage. A well reference datum may have more than one such characterization. For example, it may be the datum used by the driller and logger for measuring their depths. Example usage values would be 'permanent','driller', 'logger' 'WRP' (well reference point) and 'SRP' (site reference point).

MeasuredDepth

MeasuredDepthCoord

The measured depth coordinate of this reference datum as measured from another datum. The measured depth datum should either be the same as the elevation datum or it should be relatable to the elevation datum through other datums. Positive moving toward the bottomhole from the measured depth datum. This should be given when a local reference is "downhole", such as a kickoff point or ocean bottom template, and the borehole may not be vertical. If a Depth is given then an Elevation should also be given.

Name

String64

The human understandable contextual name of the reference datum.

Remark

String2000

A contextual description of the well reference datum.

uid

String64

A unique identifier for this data element. It is not globally unique (not a uuid) and only need be unique within the context of the parent top-level object.

From: WellDatum.Elevation

0..1To: WellElevationCoord

Association

From: WellDatum.

To: AbstractDatum

Association

From: WellDatum.Wellbore

0..1To: DataObjectReference

Association

From: WellDatum.Rig

0..1To: DataObjectReference

Association

From: WellDatum.HorizontalLocation

0..1To: Location

Association

From: WellContext.

0..*To: WellDatum

Association