Sub-Seismic Faults and Their Possible Influence on Overpressure and Hydraulic Leakage - Examples from Offshore Norway

The sealing properties of the major fault in a sedimentary basin are potentially important, timevariable parameters in the evaluation of lateral fluid flow. The sealing capacity of fault depends on lithology, burial depth, diagenesis and throw. Though, large uncertainties are associated with the intepretation of hardly detectable faults where such occur in the continuation of larger fault zones on seismic. Such sub-seismic faults can contribute to the establishment of pressure compartments in sedimentary basin.