The Tor Formation is a geological formation of late Campanian to Maastrichtian (uppermost Cretaceous) age. It forms the part of the Chalk Group in the North Sea. It is an important reservoir for oil and gas in fields such as Valhall. It overlies the Hod Formation. It underlies the Ekofisk Formation with local evidence of unconformity.[1][2][3]
| Tor Formation | |
|---|---|
| Stratigraphic range: Late Cretaceous Late | |
| Type | Geological formation |
| Unit of | Chalk Group |
| Underlies | Ekofisk Formation |
| Overlies | Hod Formation |
| Thickness | up to 472 metres (1,550 ft) |
| Lithology | |
| Primary | Chalk |
| Location | |
| Region | North Sea |
| Country | Denmark, Norway & United Kingdom |
| Type section | |
| Named for | Tor field |
| Location | Well 1/3-1. Norwegian sector |
See also
editReferences
edit- ^ NPD. "Tor Formation". NORLEX. Retrieved 25 August 2022.
- ^ British Geological Survey. "Tor Formation". The BGS Lexicon of Named Rock Units. Retrieved 26 August 2022.
- ^ Blinkenberg, K.H.; Anderskouv, K.; Sheldon, E.; Bjerrum, C.J.; Stemmerik, L. (2020). "Stratigraphically controlled silicification in Danian chalk and its implications for reservoir properties, southern Danish Central Graben". Marine and Petroleum Geology. 115. doi:10.1016/j.marpetgeo.2019.104134.