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Audit of Statoil - subsea separation on Tordis

During the period 9-17 November 2006, the Petroleum Safety Authority Norway (PSA) conducted an audit of the Tordis IOR project (Increased Oil Recovery). The audit targeted the subsea separation unit. Our main impression is that Statoil has placed emphasis on establishing and implementing a suitable management system for the project. We did, however, find one nonconformity in relation to the regulations.


Tordis (kilde: Statoil)

The Tordis field is located in the Tampen area between the Gullfaks and Snorre fields. The field is developed with several subsea installations tied to the Gullfaks C facility. See illustration.

Background for the audit

The PSA is to set standards and follow up to ensure that the players in the petroleum activities maintain a high level of health, environment, safety and emergency preparedness, and thereby also contribute to creating the greatest possible value for the greater society.

The PSA is also to contribute towards reducing the risk level in the petroleum activities by following up to ensure that the players facilitate good technical and operational integrity.

The Tordis IOR project makes use of new technology linked to a subsea separation unit that will be installed and become operational during the course of 2007. The Tordis subsea separation unit represents a significant contribution towards developing and improving existing technology.

Purpose of the audit

The purpose of the audit was to verify the operator's compliance with regulatory requirements, as well the company's own requirements for the subsea separation plant, and to ensure that the management system safeguards the assumptions made in connection with the design and qualification of materials and technology.

We also wanted to verify the operator's system for following up suppliers.

Result of the audit

Our main impression is that Statoil has placed emphasis on establishing and implementing a suitable management system for the project, particularly in connection with preparation of technical specification requirements for this type of facility.

However, we did uncover one nonconformity in relation to the regulations. The nonconformity is linked to handling of nonconformities. The report also notes three areas where there is potential for improvement; these relate to the design basis, welding procedures and completion of procedures.

Contact person i the Petroleum Safety Authority
Mike Theiss