[[:file:evaluating-top-and-fault-seal_fig10-37.png|Figure 3]] is a ductility-time plot for an Upper Jurassic top seal in the Central Graben, North Sea. The plot shows the paleodensity and inferred paleoductility during progressive burial of shales at the 141- and 151-m.y sequence boundaries. Prior to approximately [[length::100 m]].y, the Late Jurassic shale top seal had a density of 3 and was ductile. Strain prior to [[length::100 m]].y. would not contribute to seal risk. Any deformation occurring after [[length::100 m]].y. could have caused fracturing, given sufficiently high strains. | [[:file:evaluating-top-and-fault-seal_fig10-37.png|Figure 3]] is a ductility-time plot for an Upper Jurassic top seal in the Central Graben, North Sea. The plot shows the paleodensity and inferred paleoductility during progressive burial of shales at the 141- and 151-m.y sequence boundaries. Prior to approximately [[length::100 m]].y, the Late Jurassic shale top seal had a density of 3 and was ductile. Strain prior to [[length::100 m]].y. would not contribute to seal risk. Any deformation occurring after [[length::100 m]].y. could have caused fracturing, given sufficiently high strains. |