Subseismic faults in reservoir description & simulation



K. L. Munthe1H. Omre2L. Holden1, E. Damsleth3, K. Heffer4T. S. Olsen5 & J. Watterson
1 - Norwegian Computer Centre,
2 - Norwegian Institute of Technology/Norwegian Computer Centre,
3 - Norsk Hydro a.s,
4 - BP Exploration,
5 - Statoil A/S

Abstract - A program system based on a stochastic model of fault patterns and propoerties has been implemented. The faults are modelled as fault planes together with associated displacements of adjacent rock. Realisations of the fault characteristics in a reservoir can be generated. The generated array of faults is applied to a reservoir description (permeability field). The fault planes may act like barriers to fluid flow. The displacement of rock can disconnect a high permeable zone and thereby reduce the overall flow properties. On the other hand, it can also connect high-permeable rock and improve flow.

Although the reservoir geometry and properties are changed by the faults, well observations may still be honoured by taking faults into account when creating the description. 


Society of Petroleum Engineers 26500, 843-850, 1993.