Spatial conditional simulation of facies objects for modeling complex clastic reservoirs

A novel methodology for object modeling of facies that links the concept of Boolean simulation to the geostatistical sequential indicator simulation (SIS) is developed leading to new technology for sequential modeling of geo-objects. The developed approach provides an algorithm for facies models honoring indicator variograms with object realizations. Results, based on stepwise conditioning of various categories, allow for realizations of clastic facies in a complex faulted grid. This technology is applied to modeling of a large clastic, faulted and pinched-out gas reservoir in Saudi Arabia.