Geological Society Special Publication No. 69, pp. 105-134. Effects of heterogeneities in a braided stream channel sandbody on the simulation of oil recovery: a case study from the Lower Jurassic Statfjord Formation,

Abstract: Three heterogeneous models of a channel sandbody of braided stream origin were constructed by combining reservoir data from the middle reservoir unit of the Lower Jurassic Statfjord Formation in the Snorre Field in the Norwegian Sector of the North Sea, with facies and geometry data from an exposed analogue channel sandbody in the Pennsylvanian-Permian Maroon Formation, Colorado. Permeability classes corresponding to those in the Stat-fjord Formation were distributed according to facies variation in the analogue sandbody and to the recorded vertical distribution in the Middle Statfjord sandbodies. Relative permeability and capillary pressure curves were made for individual permeability classes. Two-dimensional (yz-plane) reservoir simulation of waterflooding was carried out with injection at the down-dip end and production at the up-dip end of the models, which measured 104 m x 8.75 m and had a structural dip of 8 °. The results were compared with simulations on two reference models, one of a homogeneous sandbody and one with the permeability zonation organized i