| Cenozoic Sumatra back-arc basins include Sumatra North, Sumatra Central and Sumatra South ones in Sumatra Island, Indonesia. These basins have undergone the evolution stages from Eocene-Oligocene syn-rifting through Oligocene-Middle Miocene post-rifting to Middle Miocene-Pliocene tectonic inversion. According to rifting and reservoir characteristics, four different plays, i.e. the upper, the middle, the lower and the deeper ones, can be recognized. The deeper and lower plays are characteristic of syn-rifting terrestrial sandstone reservoirs and transitional sandstone reservoirs while the middle and upper plays are characteristic of post-rifting marine carbonate reservoirs and transitional facies sandstone reservoirs. It is indicated that the middle play is of the most significant potential among these plays. |
