OSLO, Norway – Petroleum Safety Authority (PSA) Norway has performed an audit of Lundin Petroleum’s plans to apply managed pressure drilling (MPD) during upcoming exploratory drilling in the Barents Sea.
Lundin recently gained authorization to drill well 7120/1-5 on the Gohta prospect in PL 492, 185 km (115 mi) northwest of Hammerfest, using the semisubmersibleLeiv Eiriksson.
The deployment involves use of the controlled mud level (CML) method. PSA points out that this is a relatively new method for drilling anywhere, which involves use of temporary and heavy equipment.
As a result, operational procedures are different, requiring customized and strict risk assessments.
PSA’s audit also covered the involvement of the drilling contractor Ocean Rig and the service provider Enhanced Drilling.
Although the assessment revealed no regulatory non-conformities, it did highlight areas for improvement related to:
- Information about the new drilling method in the application for consent
- Information about the method in the well-control manual
- Manual shutoff valve in the drilling fluid return pipe.
Lundin must respond by April 6 on how it plans to address these issues.