WITSML Version 1.4.0 Data Schema Change Summary

This documents is intended to sumarize Data Schema changes between version 1.3.1.1 and version 1.4.0. 

Added a new attachment object.

Added a new changeLog object.

Added a new coordinateReferenceSystem object. This supports a GML style CRS definition. The old definition has been retained but is deprecated.

Added a new drillReport object.

Removed the dtsInstalledSystem and dtsMeasurement objects. They have been moved to PRODML for support.

Moved the WITSML_composite schema to a parallel specification which can utilize both WITSML and PRODML data structures. In order to support the Witsml_composite and a new aggregate object in a parallel specification, moved some file to a schemas_common folder with the rest being in folder schemas_witsml. The files in the schemas_common folder will use an identical copy in PRODML such that when mutiple specifications are copied to the same parent folder structure there will only be one schemas_common folder.

Documented that queries against dTimCreation or dTimLastChange represent a request for values that are greater-than the specified value.

Supported retention of the timezone for an acquisition (e.g., a log). Made the time zone mandatory in all date-time values and in the well timeZone element.

Added an event type to the documentInfo audit structure. This will allow clients and servers to capture timestamps associated with a web service.

Clarified that only the well object has a globally unique uid attribute.

In the wellbore object:

• Added an isActive elementt.
• Added elements for the current measured depth and true vertical depth of the bit.

Added a serviceCategory to all objects (via commonData).

In realtime, log and wellLog:

• Made dataGroup consistent between realtime, log and wellLog. Added to log and wellLog. Moved to group definition in realtime. Modified the definition of the group definition id.
• Made the curve data type mandatory and added new enumerations.
• Added a class index value parallel to classWitsml values in order to capture an item number (e.g., the 3'rd pump).
• Clarified that columnIndex is meaningless if data records are not returned.
• Deleted nullValue from cs_blockInfo.
• Added curveSensorsAligned to log and wellLog.
• Allowed dataRowCount to have a zero value.
• In RealtimeData (used by classWitsml):
  • Deprecated "pressure drop at bit".
  • Deprecated "chkPrAv" in favor of the new "choke pressure (average)".
  • Added new enumeration values for a WITSML activity code and a WITS activity code.
  • Renamed "TVD of Bit" (deprecated) to "TVD of bit".
  • In the enumValues.xml file, added knowledge of either the expected data type or the measure class. A measure class section was also added to capture the allowed uom.

In the realtime object:

• Added an element to capture when the header was last changed.
• Documented that queries against dTim represent a request for values that are greater-than the specified value.

Added a data delimiter for log data. This allows user specified text to contain commas.

Added a capability to capture the depth registration from an image of a wellLog.

In the log and wellLog objects:

• Made the curve data type mandatory and added new enumerations.
• Documented the use of a multipass parameter.
• Added an index offset flag.
• Made the uom attribute mandatory in type genericMeasure.

In the trajectory and trajectoryStation objects:

• Added a calculation algorithm element to the station
• Added six new correction applied elements to the station.
• Added three new correction values.

In the log, wellLog, mudLog and trajectory objects, modified the growingObject element to support three states.

Supported the concept of noun versus adjective in the lithology qualifiers. This primarily affects the meta data in file ancilary/enumValues.xml. Deprecated 39 values and added 34 values.

In the bjaRun object, allowed drillingParams to recur.

Other small changes and fixes were also made.

• Eliminated use of listOfDouble (conflict with .NET).
• Used an integer instead of xsd:gYear for the rig year entered service.
• Eliminated "locked" and "valid" as values of the trajectory status.
• Changed the type of some water depth elements to be a length rather than a coordinate.
• Modified cs_documentInfo to be consistent with schema construction guidelines.
• Clarified the meaning of biasVert in cs_stnTrajMatrixCov.
• Added a uid attribute to cs_bitRecord.
• Changed the length of strings phase and detailActivity in cs_activity.