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Report following audit of subsea installation and pipelines on Skarv

Audit: The Petroleum Safety Authority Norway (PSA) has conducted an audit of how BP Norge AS (BPN) manages the engineering of pipelines as well as engineering and manufacturing of the subsea installation in the Skarv project.

The audit activity was carried out according to the following plan:

  1. Opening meeting with BP's Skarv project in Aker Solutions’ premises at Lysaker, Norway on 26 February 2008.
  2. Meeting, conversations and verifications with the supplier Vetcogray and subcontractor BiFab (Burntisland Fabrication Ltd.) in Scotland (Burntisland) on 8 and 9 July 2008.

A summary meeting was held in Burntisland on 9 July 2008.

Skarv is located approx. 35 km southwest of the Norne field in the northern part of the Norwegian Sea. The development is a coordination of the 6507/5-1 Skarv and 6507/3-3 Idun deposits. The ocean depth in the area is from 350 - 450 metres.

The development concept is a floating production installation (FPSO) connected to five subsea templates.

Background for the audit
An important prioritisation for our HSE follow-up is to ensure that the players follow up the technical condition of the installations. In this respect, good follow-up during the design and manufacturing phases are important in order to uncover potential weaknesses which may have consequences for the operations phase.

During our consideration of the Plan for Development and Operation (PDO) of the Skarv field, we identified several areas for follow-up of the development project. The project faces challenges e.g. in relation to subsea installations and choice of material. The project has several interfaces and therefore managing contractors and activities is a challenge.

Purpose of the audit
The purpose of the audit was to follow up to ensure that the manufacturing was planned and implemented in accordance with current regulatory requirements and accepted standards.

A further objective was to verify the operator's system for follow-up of contractors, and to ensure that the management systems safeguarded lessons learned in connection with the project.
Result of the audit
In general we have a good impression of the management and implementation of the activities related to manufacturing of the subsea installations.

No non-conformities were identified during the audit, but we discovered five areas with a potential for improvement. These areas were follow-up of manufacturing, handling of non-conformities, renewal of welding certificates, document management and follow-up of subcontractors.