14.7.5.7 DeviationSurveyRepresentation
| Topic Version | 1 | Published | 09/11/2015 | |
| For Standard | RESQML v2.0.1 | |||
| Stereotypes: | XSDcomplexType,XSDtopLevelElement | |||
Specifies the station data from a deviation survey.
The deviation survey does not provide a complete specification of the geometry of a wellbore trajectory. Although a minimum-curvature algorithm is used in most cases, the implementation varies sufficiently that no single algorithmic specification is available as a data transfer standard.
Instead, the geometry of a RESQML wellbore trajectory is represented by a parametric line, parameterized by the MD.
CRS and units of measure do not need to be consistent with the CRS and units of measure for wellbore trajectory representation.
|
Name |
Data Type |
Notes |
|---|---|---|
|
AngleUom |
PlaneAngleUom |
Defines the units of measure for the azimuth and inclination |
|
Azimuths |
AbstractDoubleArray |
An array of azimuth angles, one for each survey station. The rotation is relative to the projected CRS north with a positive value indicating a clockwise rotation as seen from above. If the local CRS--whether in time or depth--is rotated relative to the projected CRS, then the azimuths remain relative to the projected CRS not the local CRS. Note that the projection’s north is not the same as true north or magnetic north. A good definition of the different kinds of “north” can be found in the OGP Surveying and Positioning Guidance Note 1 http://www.ogp.org.uk/pubs/373-01.pdf (the "True, Grid and Magnetic North bearings" paragraph). BUSINESS RULE: Array length equals station count. |
|
FirstStationLocation |
Point3d |
XYZ location of the first station of the deviation survey. |
|
Inclinations |
AbstractDoubleArray |
Dip (or inclination) angle for each station. BUSINESS RULE: Array length equals station count. |
|
IsFinal |
boolean |
Used to indicate that this is a final version of the deviation survey, as distinct from the interim interpretations. |
|
Mds |
AbstractDoubleArray |
MD values for the position of the stations. BUSINESS RULE: Array length equals station count. |
|
MdUom |
LengthUom |
Units of measure of the measured depths along this deviation survey. |
|
StationCount |
positiveInteger |
Number of stations. |
|
WitsmlDeviationSurvey |
DataObjectReference |
Derived From: AbstractRepresentation
Derived Classes: (none)