File:Evaluating-structurally-complex-reservoirs fig4.png

Modeling extensional fault shapes from the rollover geometry. (a) The Groshong (1989b) method uses oblique simple shear with a reference grid constructed with a spacing equal to the fault heave. Distance 2 from the rollover up to regional elevation of the same reference bed is transferred to 2′; likewise, 2′ + 4 is transferred to 4′ and so on to complete the fault trajectory. Interpolation between these points is carried out using a half grid spacing. (b) Fault trajectory reconstruction by the Groshong (1989b) method uses simultaneous modeling of three horizons. Dashed trajectories are individual solutions; solid lines are the preferred solution. (From Hossack, unpubl. data, 1988.)