Table 2.

Formation leak-off test data from wells in the study area. The leak-off pressure can be taken as the fracture pressure for the rocks at the depths tested. The lithological descriptions are taken from the company logs

WellDepth subsea (m)Pressure (MPa)Description
13/24b–398823Tor Formation – firm to hard limestone
13/22b–4156329Valhall Formation, Aptian ‘Sandy’ Unit – soft to firm claystone grading to siltstone in parts
13/22b–19161131Valhall Formation, Early Aptian – loose sand and soft to firm claystone
13/22b–20158430Early Barremian Wick Sandstone Formation – loose fine- to medium- grained sandstone and calcareous claystone