No abstract

Predicting the presence and connectivity of reservoir-quality facies in otherwise mud-prone fluvial overbank successions is important as such sandbodies can potentially provide connectivity between larger neighboring sandbodies. This interseam. Well spacing was too great to allow accurate correlation of channel bodies. The Ob River, Siberia, was used as modern analogue to supply planform geometric measurements of splay and distributary channels, so that stochastic modeling of channel bodies was possible. The resulting models demonstrated that (i) channel-body connectivity is more uniform in distributary river systems than in splay complexes; (ii) relatively good connectivity is seen in proximal positions in splays, but decreases distally from the source as channel elements diverge; (iii) connectivity tends to be greater down the axis of splays, with more isolated channel bodies occurring at the margins.