Deepsea Yantai rig - Neptune

Neptune begins final drilling campaign at Duva field

Oil and gas company Neptune Energy has started drilling operations on four production wells on the Duva field in the Norwegian sector of the North Sea.

Deepsea Yantai rig; Credit: Odfjell Drilling

The wells are being drilled by the Deepsea Yantai, a semi-submersible rig operated by Odfjell Drilling. All four wells were pre-drilled and cased off at a depth of 2,500 metres, prior to starting the final drilling campaign, Neptune said on Thursday.

The Duva field is a fast-track project being developed as a subsea installation with three oil producers and one gas producer, tied back to the Neptune-operated Gjøa semi-submersible platform.

Neptune Energy’s Director of Projects & Engineering in Norway, Erik Oppedal, said: “This is the final phase of the Duva development project, and we are currently working to accelerate the start-up date. An efficient drilling campaign forms an integral part of achieving this. Duva will both increase production and extend the operational life of our operated Gjøa platform”.

According to the company, the Deepsea Yantai is now set to drill the reservoir sections, install the lower completions, and execute well clean-up activities. The drilling work is estimated to take around 110 days.

It is worth reminding that Neptune in January 2021 added two additional wells to the rig’s contract. This means that the rig is fully occupied through 2021.

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Duva is scheduled to come online in the third quarter of 2021 and will add approximately 25,000 barrels (gross) of oil equivalent per day (boepd) to the Gjøa facility.

The subsea works associated with Duva were completed in 2020, with the four subsea trees installed in March 2021.

The Duva oil and gas field was Neptune’s first discovery in the Norwegian North Sea, a strategically important area supporting the company’s growth. It is located 14 km northeast of the Gjøa field, at a water depth of 360 metres.

Licence partners on Duva, PL 636, are Neptune Energy (operator and 30%), Idemitsu Petroleum Norge (30%), PGNiG Upstream Norway (30%), and Sval Energi (10%).