1. © Copyright 2006 POSC Well Log Depth Registration Standard Stavanger 13 June 2006 Aberdeen 21 June 2006

2. © Copyright 2006 POSC What is it? A standard format for rectification data for scanned well logs. 'Rectification' calibrates well log depths and resolves skew, non-linearity, and other distortions. Meta data describes the well, wellbore, and well log. A standard, open format for producers, consumers, and vendors A prospective WITSML object

3. © Copyright 2006 POSC Why? Geologists evaluating prospects want to quickly and efficiently generate cross- sections from scanned well logs. –digitizing all logs is too costly –digitizing selected logs is too slow A single standard to make the vision possible, reducing industry costs and enabling fair competition

4. © Copyright 2006 POSC Who? Developed by work group: –A2D ExxonMobil –his Neuralog –Oilware POSC Posted for review by: –POSC membership general public –WITSML SIG PWLS SIGs –WITSML Technical Team

5. © Copyright 2006 POSC When? A POSC recommendation for immediate use by depth registration producers, consumers, and vendors Approved for inclusion in next general release of WITSML schemas

6. © Copyright 2006 POSC Where? http://www.witsml.org –click on 'Well Log Depth Registration' Questions, comments: –Jim.Theriot@posc.orgJim.Theriot@posc.org +1 713 267 5109

7. © Copyright 2006 POSC Jim Theriot, Technology Consultant Email: Jim.Theriot@POSC.org Phone: +1 713 267-5109 Fax: +1 713 784-9219