Snøhvit
The fields were discovered in 1984. The development plan was presented by Statoil in 2001, with production starting in 2006. A subsea production system was planned to feed a land-based plant on the island of Melkøya via 160 kilometres (99 mi) long submarine gas pipeline with diameter of 680 millimetres (27 in). The gas from Snøhvit was to be used for liquefied natural gas (LNG) production. The total costs of field development will be around NOK 34.2 billion. The LNG plant will emit 920 thousand tonnes of CO2 each year, an increase of Norway's total CO2 emissions by almost 2%.
The annual export capacity is 5.75 billion cubic metres of LNG, 747 thousand tonnes of condensate and 247 thousand tonnes of liquified petroleum gas. Long-term export contracts have been signed with Iberdrola in Spain and El Paso in the USA.
The field also holds limited amounts of crude oil. The recent discovery of the nearby Goliat oil field has made the oil reserves at Snøhvit more exploitable.
The development of Snøhvit sparked political controversy in Norway, as it was the first discovery in the Barents Sea to be developed. Environmental groups like Natur og Ungdom and Bellona argued that the Barents Sea is too sensitive for oil and gas production, and that the Melkøya LNG plant would drastically increase Norway's CO2 emissions. In the summer of 2002, protesters from Natur og Ungdom were arrested by the police after blocking the construction of the LNG plant at Melkøya for 10 days.
Geology
The reservoir resides in three fault blocks located in the Hammerfest Basin and consists of Lower to Middle Jurassic sandstones.
Carbon Capture and Storage
The Snøhvit gas field uses Carbon Capture and Storage (CCS) to avoid some emissions from gas processing. Gas from the Snøhvit field contains between 5 and 8 percent carbon dioxide. The carbon dioxide is separated in the Hammerfest LNG plant on the island of Melkøya, transported back into the gas field, and injected into geological formations. This project has the capacity to store around 0.7 million tons of carbon dioxide annually. Those emission savings are relatively small compared to the emissions generated by the LNG exported from Snøhvit, which are around 13 million tons.
In 2022, Equinor had announced plans for reinvestments at the Hammerfest LNG plant, including electrification of processes previously powered by fossil gas. The electrification project was controversially discussed, and using carbon capture and storage to avoid these additional emissions was proposed as an alternative. However, according to Equinor, doing so would have been extremely expensive.
Equinor expected costs of around 6,500 Norwegian kroner per ton of carbon dioxide avoided, which is much higher than usual cost estimates for CCS. Equinor proceeded with the electrification project, and it was approved by the Norwegian government in August 2023.
See also
References
- ^ Snøhvit gas field, Offshore Technology website
- ^ The Norwegian Pollution Control Authority Archived 2007-09-28 at the Wayback Machine
- ^ Linjordet, A., Grung Olsen, R., The Jurassic Snohvit Gas Field, Hammerfest Basin, Offshore Northern Norway, 1992, in Giant Oil and Gas Fields of the Decade, 1978-1988, AAPG Memoir 54, Halbouty, M.T., editor, Tulsa: American Association of Petroleum Geologists, ISBN 0891813330, pp. 349-370
- ^ "High gas exports and emissions cuts from Hammerfest LNG". Equinor. Equinor. 2022-12-20. Retrieved 2024-06-16.
- ^ Hovland, Kjetil Malkenes (2022-12-20). "Equinors julegave til Hammerfest: Skal bruke 13 mrd. på Snøhvit". Bergens Tidede. Retrieved 2024-06-16.
- ^ Hovland, Kjetil Malkenes (2023-01-28). "Equinor forsvarer Melkøya-prosjektet: – Mye mer enn en stor kraftforbruker". Stavanger Aftenblad. Retrieved 2024-06-16.
- ^ Böck, Hanno (2024-06-06). "Is Carbon Capture and Storage more expensive than we thought?". Industry Decarbonization Newsletter. Retrieved 2024-06-16.
