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ISCWSA information

Dear Colleagues,

The 41st meeting of the SPE - Wellbore Positioning Technical Section / ISCWSA will be held in the Spring of 2015 further details to follow:


Engaging Technical Discussion

Members of the ISCWSA shape the industry standards for wellbore positional uncertainty analysis, and discuss the state-of-the-art in wellbore positioning technologies. Come and be a part of the present and future of safety-critical wellbore positioning innovations and procedures.


Please contact Chad Hanak with any questions. 

Best Regards

The ISCWSA Committee



Please find new content in the meeting minutes and new Docs and Publications sections


The Joint Industry Project e-book "Introduction to wellbore positioning" and New Video links below: 

ISCWSA Committee members:

Peter Clark, Chevron:  Chair Person

Son Pham, ConocoPhillips:  Program Chair

Chad Hanak, Intuitive Machines:  Secretary

Robert Wylie, NOV:  Treasurer

Philip Harbidge, Schlumberger:  Webmaster

Ian Mitchell, Halliburton: Director at large

Anas Sikal, Pathcontrol:  Director at large

Mark Michell: BHP Billiton:  Director at large

Ludovic Macressey, Pathcontrol:  Director at large


The ISCWSA Work Groups:

Neil Bergstrom, Devon Energy: Operator Wellbore Survey Group, (OWSG) Chair site link:- Operator's Wellbore Survey Group; Secretary Son Pham

Steve Grindrod, Copsegrove:  Error model Management Work Group Chair site link:- Error Model Management / /

Steve Sawaryn, BP:  Collision Avoidance Work Group Chair site link:- Collision Avoidance

Steve Mullin, Gyrodata:  Industry Education Work Group Chair site link:- Education

Mike Long, Baker Hughes INTEQ: Well Intercept Work Group Chair site link:- Well Intercept


For any suggestions for the ISCWSA web page please contact the webmaster on

If you would like to be added to the ISCWSA e-mail distribution list please contact Chad Hanak, ISCWSA Secretary on:

Welcome to the Wellbore Positioning Technical Section

The Wellbore Positioning Technical Section has existed since 1995 as the Industry Steering Committee for Wellbore Surveying Accuracy (ISCWSA). The committee was established following the SPWLA Topical Conference on Measurement While Drilling, held in Kerrville, Texas, USA, in late 1995 and became an SPE Technical Section in 2004.


  • To produce and maintain standards for the industry relating to wellbore survey accuracy.
  • To set standards for terminology and accuracy specifications.
  • To establish a standard framework for modeling and validation of tool performance.
  • To raise awareness and understanding of wellbore survey accuracy issues across the industry.

The Way We Work

The ISCWSA (Industry Steering Committee for Wellbore Surveying Accuracy) consists of an informally constituted group of companies and individuals and was established following the SPWLA Topical Conference on Measurement While Drilling, held in Kerville, Texas, in late 1995. It affiliated to the SPE in 2004 as the SPE Wellbore Positioning Technical Section.

The group pride themselves on the 'less than formal' nature of their meetings which generate extremely open and frank discussion around the well positioning issues currently facing our industry.

Meetings are usually held twice a year and generally alternate between the United States and Europe. Most of the work is done in sub-committees between the main meetings. Sub-committees are formed and disbanded as required. Currently there are three sub-committees operating:
  • The Error Model Management Sub-Committee
  • The Collision Monitoring Sub-Committee
  • A Survey QA/QC Sub-Committee



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