News and Updates

Dear Colleagues,

The 49th General meeting is to be held in the Hague, Netherlands on Tuesday 8th March,
Sub-Committee meetings to be held on Monday 7th March.
Click here for Registration Link and Venue Details.

Slides and minutes for all meetings of the Industry Steering Committee for Wellbore Survey Accuracy (ISCWSA) / SPE Wellbore Positioning Technical Section can be found under the meeting minutes tab of this webpage.

ISCWSA#49 Meeting registration rates are :

Early Bird : $125 up to Feb 10th
Normal : $150 up to Feb 24th (cut off allows for giving "final" numbers to catering etc.)
Late/Onsite : $200

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.

If you or your organization can offer sponsorship for portions of the meetings (such as coffee breaks, lunches, meeting rooms etc.), please contact Jonathan Lightfoot, 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 21 years and we look forward to continuing our good work for many years to come.

Of additional note, the UHI on-line course based on the ISCWSA e-book details at or contact Angus Jamieson.

Best Regards,

The ISCWSA Committee

Dear Colleagues,

The ISCWSA Wellbore Intersect E-book has been updated and re-released to V11.2.28 and it can be downloaded for FREE using this link.

Click here to play the recording of the SPE wellbore-ranging-technologies-intercept-applications-and-best-practices

The subject of Well Intercept has frequently been dealt with in best practice manuals, guidelines and check sheets. This eBook will attempt to capture in one document the main points of interest for public access through the Society of Petroleum Engineer (SPE) Wellbore Positioning Technical Section (SPE WPTS) or otherwise commonly referred to as the, Industry Steering Committee on Wellbore Survey Accuracy (ISCWSA).
This eBook was written by the SPE WPTS (aka ISCWSA) Well Intercept Sub Committee (WISC) and is intended to develop good practice in wellbore intercept applications and promote its understanding within the oil and gas wellbore construction industry.

The intent of this document is to help engineers determine the appropriate ranging methods and technologies for a given positioning objective. Depending on the objective complexity, there may not be a silver bullet or one technology on its own that may provide a complete solution. In many applications, a combination of ranging technologies and methods, involving multiple industry expertise may be required to achieve the desired objectives.

The ISCWSA Wellbore Positioning ebook_v09.10.17 has recently been updated, the ISCWSA ebook training videos can be accessed using this link.

Previous SPE / ISCWSA webinars:

Well Collision Avoidance
Presented by: Steve Sawaryn, Drilling Engineering Consultant

The SPE Wellbore Positioning Technical Section (WBPTS) has been working towards a standard well collision avoidance rule for a number of years. Work started by establishing a common nomenclature and management practices. The subject involves all aspects of the Technical Section’s remit, which has expanded over the years to address the evolving drilling practices and technologies.
In the last 40 years, the frequency of unintended well collisions has decreased steadily as a result of improved directional surveying instruments, the introduction of computer based tools and databases and rigorous application of all the associated management practices involved in the planning and drilling of the wells. Despite this trend, today the greater use of pad drilling, decreased surface spacing and the introduction of more complex well trajectories has decreased the inter-well spacing at all points in the well. Unless the situation is managed, this closer proximity between wells can lead to a greater risk of well collision. An added complexity is that what is reportable is not clear, and not all collisions are reported. This situation makes analysis difficult, but useful inferences can be made. The necessary management practices, based on the WPTS work, were outlined in the paper SPE 184730 together with a summary of 19 anonymous health, safety and environment (HSE) and non-HSE well collisions which illustrate why continued vigilance in this subject matter is essential. There are strong economic as well as HSE reasons for doing so.
The webinar will review the management practices and lessons to be learned from the collision events. The discussions will also touch on the proposed collision avoidance rule which is scheduled to be presented in greater detail in the paper SPE 187073 at the forthcoming SPE 2017 Annual Technical Conference and Exhibition in San-Antonio, Texas.

Steve Sawaryn Biography:
Steve is an independent drilling engineering consultant specialising in drilling systems. During the previous 35 years he held a variety of national and international posts in BP’s Drilling Engineering Division in drilling operations, consultancy and projects. He is also a chartered engineer and fellow of the British Computer Soc. Sawaryn holds PhD and M.A. degrees from Cambridge University. He has authored more than 35 SPE papers and has served on a number of SPE committees. He received the 2010 SPE North-Sea Region Technical Award for Drilling Engineering and now chairs the SPE Wellbore Positioning Technical Section, Collision Avoidance sub-committee.