Gas hydrates and shallow gas

Research on gas hydrates and shallow gas in the seabed is a key activity for the Marine Geology group. We have performed several large projects in cooperation with the Norwegian Research Council, the oil industry and other institutions in Norway and abroad.
PPockmarks in the Oslofjord indicate that gas or fluids leak or have been leaking from the seabed. Illustration: Aivo Lepland.

NGU is a currently partner in CAGE – Centre for Arctic Gas Hydrate, Environment and Climate (www.cage.uit.no), and has previously been a partner in the GANS project. Both projects have been financed by the Norwegian Research Council and oil companies. Gas hydrates and shallow gas are also studied in several NGU projects financed by oil companies.

Knowledge of gas hydrates is important for evaluation of seabed stability and geohazards, climate evolution and the ecology of the seabed. Gas hydrates are considered as a potential future resource because of their high methane content. Shallow gas can originate from sedimentary rocks or overlying sediments. NGU has long experience in mapping of sedimentary rocks along the Norwegian coast and in fault basins in the fjords. These data are being used during hydrocarbon exploration by the oil industry.

Det likner en fontene, men er en søyle av gassbobler som strømmer ut fra havbunnen. En annen gassøyle sees lenger bak. Den uregelmessige havbunnen skyldes isfjell som har pløyd opp bunnen mot slutten av forrige istid. Fra Chand m. fl. (2012).
Gas bubbling out of the seabed like fountains. The irregular seabed is created by drifting icebergs that ploughed into the seabed at the end of the last glaciation. From Chand et al. (2012).

Relaterte prosjekter

MAREANO
MAREANO maps the bathymetry, seafloor conditions, biodiversity, geodiversity and sedimentary contamination along the Norwegian coast and sea areas.