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Electricity grid connected to oil field to reduce carbon emmissions

By: Matthew White 14/05/2018 Statoil

General Grid

Installation of the cable which will supply Johan Sverdrup with power from the shore began last week. The North Sea giant will be one of the oil and gas fields with the lowest CO2 emissions worldwide.

On Wednesday 9th May the cable-laying vessel NKT Victoria began laying the cables from the converter station at Haugsneset that will supply the Johan Sverdrup field with power from shore. By the end of May the vessel aims to lay around 200km of cable in the North Sea for the project.

Bundled with the power cables, a fibre-optic cable will ensure good communication and enable monitoring and, when required, remote control of parts of the Johan Sverdrup field’s operations from shore.

“We are now laying the very lifeline of the Johan Sverdrup field, which will supply the field with power from shore for more than 50 years,” says Trond Bokn, senior vice president for Johan Sverdrup.

The power cables will help make Johan Sverdrup one of the most carbon-efficient oil and gas fields in the world. Estimated at just 0.5 kg of CO2 per barrel, the emissions from Johan Sverdrup are about 20 times lower than the average field on the Norwegian continental shelf, and 30 times lower than the international average.
The CO2 emissions avoided as a result of Johan Sverdrup using power from shore add up to more than 400,000 tonnes of C02 per year, equivalent to the emissions of some 200,000 cars each year.

This figure aims to help Statoil (Equinor) reach its goal of reducing annual carbon emissions by three million tonnes by 2030, compared with estimated emissions. "The name Equinor reflects ongoing changes and supports the always safe, high value and low carbon strategy we outlined last year,” says chair of the board in Statoil, Jon Erik Reinhardsen.

“The world is facing considerable challenges ensuring access to enough energy while doing so in a more climate-friendly way. Here Johan Sverdrup will play an important role: over the next 50 years, the field’s considerable reserves will be used to produce significant amounts of energy with low CO2 emissions,” says Bokn.

Several additional measures have been implemented to further reduce emissions during the Johan Sverdrup development. The cable-laying vessel NKT Victoria was designed to be supplied with power from shore while in harbour.

“We’ve worked systematically to take advantage of the opportunities which the power from shore solution has given us. As a result, I believe we’ve been able to reduce the carbon emissions from the field to the minimum,” says Geir Bjaanes, responsible for subsea, power and pipelines for the Johan Sverdrup project.

“Before we get to that stage, however, we need to stay focused on the hectic installation period ahead of us. For the next three weeks or so we will be laying almost 10km of cables every single day. We have spent much time together with NKT preparing for this, but this will put our skills to the real test, our number one priority being safety and ensuring high quality in execution,” says Bjaanes.

After the cables reach the Johan Sverdrup field at the end of May, the next step will be to pull the cables into the riser platform. Then the cables will be connected, before preparations and testing of the system start. This first phase of the Johan Sverdrup field is expected to be powered from shore by this autumn.

After the start-up of the second phase of the development in 2022, the Johan Sverdrup field will also enable power from shore to reach the remaining fields on the Utsira High – Edvard Grieg, Gina Krog and Ivar Aasen.

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Electricity grid connected to oil field to reduce carbon emmissions

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