Position Incidents During Offshore Loading With Shuttle Tankers On the Norwegian Continental Shelf 2000-2011
- Arne Kvitrud (Petroleum Safety Authority (PSA)) | Harald Kleppestø (Petroleum Safety Authority (PSA)) | Odd Rune Skilbrei (Petroleum Safety Authority (PSA))
- Document ID
- International Society of Offshore and Polar Engineers
- The Twenty-second International Offshore and Polar Engineering Conference, 17-22 June, Rhodes, Greece
- Publication Date
- Document Type
- Conference Paper
- 2012. The International Society of Offshore and Polar Engineers
- Collisions; shuttle tankers; offloading; procedures; competence; software.
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- 171 since 2007
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Since year 2000 there have been two collisions between shuttle tankers and facilities on the Norwegian continental shelf. In addition, there have been four near collision events and seven incidents related to loss of position, with varying degree of severity. The 13 cases will be briefly described. The paper will provide a review of the most common causes of the events. The high number of incidents has caused several initiatives in the industry to get improvements. We will discuss the results from research activities, industry groups, and how PSA regulate the activity. INTRODUCTION This article The paper is divided into four sections. The first section gives an overview of the present regulations and guidelines. The second provides a statistical overview of the collisions. The third section is a review of the events which from the authors point of view, is the most onerous since year 2000. The last section will discuss the needs for improvement. Publications on collisions data Data on shuttle tanker collisions on the Norwegian Continental shelf have previously been reported by Kvitrud (1994 and 2011) and PSA (2011). Several collisions on the UK continental shelf are reported by HSE (2001) including incidents up to October 2001. Since then, the shuttle tanker Loch Rannoch (130,031 dwt built 1998) had a collision with the Schiehallion FPSO in 2009 (Bevington, 2009). Offshore loading systems in Norway The following offshore loading systems are used or have been used in Norway:
- Tandem loading from FPSOs (Floating, Production, Storage and Offloading platforms) are used at the Balder, Jotun, Alvheim, Norne, Petrojarl 1, Petrojarl Varg and Åsgard A, and are planed from Skarv, Knarr and Goliat. Loading from FSUs (Floating, Storage, Unit platforms) are used at Åsgard C, Njord B and Navion Saga (at Volve).
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