Technical Team Meetings

1
Technical Team Meetings

• November 2/3 2004

2
Technical Team Process

• Representatives from SIG members
• Collect feedback on Yahoo Group web site
• Private area on WITSML.org site
• Maintain WITSML servers for interoperability
  testing
• Telephone conference monthly or more often if
  required
• Face to face meetings at WITSML seminars
• POSC maintains the latest issue list
• 121 discussion items

3
Technical Team Summary

• Empty elements in objects
• Dont return if not mandatory
• Use defined null values if mandatory
• Custom data for sub-objects
• Just add to BHA for now
• Server API Versioning
• Remove from individual functions

4
Technical Team Summary

• Embedded Binary Objects
• Enables inclusion of pictures or other binary
  data in WITSML objects
• Industry standards SOAP with Attachments
• Other options to embed (MIME/Base64 encoding) can
  increase object size
• Mudlog
• Adopt new mudlog schemas from use case group
• Event notification
• Use a change log that can be queried for latest
  changes and historical changes

5
Technical Team Summary

• Wellbore Discussions
• Define wellbore as a path from a unique bottom
  hole location back to surface
• Wellbore may have data associated with it back to
  surface e.g. trip, wireline or mud circulation
  data
• Define definitive survey from current wellbore
  position back to surface compatible with UKOOA P7
  or equivalent
• Operators require a simple query to retrieve
  trajectory from bottom to surface. (Use the
  options in parameter in the SOAP query)
• Requires further discussion with other use case
  groups to align with WellPathML and other
  initiatives

6
Technical Team Summary

• Risk Object
• Proposed by Schlumberger
• Can be used for risk, event, best practices
• Used for planning and reporting actual events
• Can attach to any WITSML object using mechanism
  defined for message object
• Risk/Event may be associated with depths and/or
  times

7
Technical Team Plans

• Agree on content of 1.3 Schema by end 2004
• Update test servers with 1.3 schema data sets
• Continue work on well path/well header
• Implement new schemas as identified by use case
  team
• If you want to influence the WITSML standard,
  join the SIG