Business | Oil & Gas

Norway surveys Troll field for carbon storage

Norway has begun seismic surveys at its biggest North Sea oil and gas field, Troll, to determine whether carbon dioxide emissions could be stored there, energy officials said on Friday.

  • Agencies
  • Published: 23:12 September 5, 2008
  • Gulf News

Oslo: Norway has begun seismic surveys at its biggest North Sea oil and gas field, Troll, to determine whether carbon dioxide emissions could be stored there, energy officials said on Friday.

Troll is touted as one of three possible North Sea locations for storing carbon produced by gas-fired power plants in the coastal cities of Mongstad and Kaarstoe in a bid to curb emissions of heat-trapping gases blamed for global warming.

"The survey is an important part of our work to achieve the goal of storing carbon dioxide in the subsurface," research coordinator Odd Magne Mathiassen at the Norwegian Petroleum Directorate (NPD) said in a statement.

Troll operator StatoilHydro has been storing carbon dioxide (CO2) below the seabed at the Sleipner gas field in the North Sea since 1996. But that is CO2 stripped from the gas stream at the field, not emissions from plants on shore.

"Finding the optimal placement of injection wells is important to ensure that the carbon dioxide can be stored and that it will remain in the reservoir in the future," he added.

The "Johansen formation" in which the CO2 could be stored is located below Troll's oil and gas reservoirs, at a depth of approximately 2,500 metres, the NPD said.

Troll, on stream since 1996, still has more than a billion barrels of oil equivalent of recoverable reserves - nearly a third of Norway's total reserve estimate.

The 3D-seismic surveys are made by vessels which shoot pressure waves down into the seabed.

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