Fault Plane Profiles (FPP)
A fault plane profile is a cross section, in the plane of the fault, that shows the juxtaposition relationships along the fault plane. An example from a Gulf Coast field shows sand/sand, sand/shale, and shale/shale juxtapositions. Some sand/sand juxtapositions will seal; some will leak. Seal behavior is dependent upon the gouge composition at each point along the fault.
Fault plane profiles allow you to infer seal behavior of faults in producing fields and allow you to predict seal behavior and hydrocarbon column heights in untested prospects. To see some examples of identifying sealing and leaking faults go to SealLeak.
The following two figures show the stratigraphy in the hanging-wall (left) and the stratigraphy in the footwall (right) along Fault W in a Gulf Coast field. These are a cross section in the plane of the fault.