− | Routine top seal analysis changes the ranking of prospects as well as the exploration strategy in the Central Graben. Large prospects, normally at the top of the ranking, unfortunately may also be large-strain, high-risk structures. The chances of success can be increased by drilling low-strain, low-risk structures. Note that prospect size and strain magnitude are not necessarily related. Large prospects could be low-relief, low-strain structures. Continued drilling in the Central Graben has confirmed this strain threshold with a larger sample of tested traps (Koch et al., 1992). | + | Routine top seal analysis changes the ranking of prospects as well as the exploration strategy in the Central Graben. Large prospects, normally at the top of the ranking, unfortunately may also be large-strain, high-risk structures. The chances of success can be increased by drilling low-strain, low-risk structures. Note that prospect size and strain magnitude are not necessarily related. Large prospects could be low-relief, low-strain structures. Continued drilling in the Central Graben has confirmed this strain threshold with a larger sample of tested traps.<ref name=Koch1982>Koch, J.-O., Holm, L., and Michelsen, O. 1982: Jurassic. In: Michelsen, O. (ed.): Geology of the Danish Central Graben. Danmarks Geologiske Undersøgelse Serie B 8, 37–45.</ref> |