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The ISCWSA, (Industry Steering Committee on Wellbore Survey Accuracy) work has resulted in the publication of technical papers, leading technical work shops, multiple SPE “Hits and Misses” workshops, the Wellbore Positioning e-book, anti-collision papers and API project. We have comprehensive cross-industry, international representation with regular attendance from a wide variety of service companies, operators, and consultants, academia and software companies.

The Industry Steering Committee on Wellbore Survey Accuracy was founded to dispel the confusion and secrecy commonly associated with wellbore surveying and to enable the industry to produce consistent, reliable estimates of survey-tool performance in today's wells. We achieve these goals through the production and maintenance of standards covering the construction and validation of tool error models.

Work focused initially on Measurement While Drilling systems. They provide a large proportion of the total directional survey data world-wide and, because of their similarities between suppliers, are more amenable to specification standardization than other types of survey tool.

There is no formal membership enrollment to join the ISCWSA and its meetings are open to all who wish to attend. The committee generally holds twice yearly meetings and has held 56 meetings internationally to date. The ISCWSA is also affiliated with the Society of Petroleum Engineers as the SPE Wellbore Positioning Technical Section, click here to join.

Click this link for the Wellbore Positioning Technical Section Meeting Minutes

Click here for Wellbore Positioning Technical Section Sub-Commitee information and documents

Active Sub-Committees :

  • Elected ISCWSA WPTS Committee Members -

Wellbore Positioning Technical Section, (ISCWSA) Meeting 57


Greetings ISCWSA current and future members,

The next ISCWSA meeting, #57 will be held on the 9th & 10th March 2023. 

The 57th General Meeting of the ISCWSA will be held in conjunction with the SPE/IADC Drilling Conference in March 2023, in Stavanger, Norway, and we are pleased to announce that it will be hosted by Equinor at the Equinor Business Center in Forus.


Subcommittee meetings will be held on Thursday March 9th, with the General Meeting on Friday March 10th.

Pre-registration will be required for access to the meetings. 


Aker BP are kindly sponsoring a Networking event on the evening of March 9th, for pre-registered attendees of the General Meeting.


The ISCWSA main meeting 57 agenda is listed below:

Amongst the ISCWSA Subcommittee Updates (#ErrorModel, #CollisionAvoidance, #SurveyQAQC, #OWSG #APIRP78, #Education, #WellIntercept and more information on our #NewISCWSATrainingCourse you will have the chance to interact with Multiple Industry Leading Peers. 

Kind Regards

The #ISCWSA Committee

Please visit our updated website www.iscwsa.net

Please pass this message on to others who may want to contribute to the groups work


  • Chair Person: – Adrian Ledroz
  • Program Chair: Hans Dreisig
  • Secretary: Tim Paton
  • Treasurer: Robert Wylie
  • Webmaster: Phil Harbidge
  • Membership Chair: Marc Willerth
  • Director at Large: David Gibson
  • Director at Large: Mahmoud Elgizawy
  • Director at Large: Carol Mann
  • Director at Large: Matthew Weber

If you are a member of a sub-committee, we will be grateful if you can plan to attend. If you are interested in serving on a committee, contact the sub-committee chairperson. A contact list is available on the ISCWSA sub-committee tab.

  • Darren Aklestad, Collision Avoidance Subcommittee Chair
  • Andy McGregor, MWD Subcommittee Chair
  • Mahmoud Elgizawy, Education Subcommittee Chair
  • Phil Harbidge, Survey QAQC Subcommittee Chair
  • Benny Poedjono, Well Intercept Subcommittee Chair
  • Jamie Dorey, Well Intercept Subcommittee Co Chair
  • Jonathan Lightfoot, Operator Wellbore Survey Subcommittee Chair

Kind Regards,

If you or your organization can offer sponsorship for portions of the meetings (such as coffee breaks, lunches, meeting rooms etc.), please contact Adrian Ledroz, ISCWSA Chairperson. We are indebted to the many past sponsors who have contributed to sustain our technical community work which has been running for over 22 years and we look forward to continuing our good work for many years to come.