Partners address Siri subsea issues

A concept should be selected in mid-year for permanent repair of the subsea caisson on the Siri field offshore Denmark, according to partner Noreco.

Offshore staff

STAVANGER, Norway -- A concept should be selected in mid-year for permanent repair of the subsea caisson on the Siri field offshore Denmark, according to partner Noreco.

Cracks caused production to be suspended for months, and the problem has proven difficult to rectify.

However, repairs should be performed this summer to a malfunctioning subsea valve that has caused the SCB-1 subsea producer well to be shut in since late April 2010. The workover operation will involve retrieval of the production tubing.

In January, Noreco adds, an upgrade of the centrifugal compressor at the Siri platform was completed successfully. This has led to a significant increase in high-pressure gas capacity, enabling production from low pressure wells.

Among the company’s other North Sea interests, seismic reprocessing is under way on the Gita discovery offshore Denmark, involving four different surveys and aimed at pre-stack depth migration to improve depth imaging.

This should reduce depth uncertainty and provide a better basis for placement of appraisal wells. The data should be ready for interpretation around mid-year.

In the Norwegian North Sea, drilling of the exploration/production well A-14 on the Brage field has been temporarily halted, as the Arran prospect did not contain hydrocarbons. The partners (led by Statoil) now plan to use the well for oil production from another reservoir section.

The Flyndre discovery in license PL018C, operated by Maersk, is progressing towards a development decision in 2011. Flyndre straddles the Norway/UK border and unitization discussions are ongoing.

In the Norwegian Sea, the Gygrid discovery in PL348 has been renamed Hyme. Operator Statoil plans a subsea development with a tieback to the Njord platform. The partners expect to submit a plan to the Norwegian authorities this month and aim to start production in the first half of 2013.

Seismic data acquired last year will be used to further delineate exploration potential in the license, Noreco adds.

05/06/2011

More in Field Development