Publications

Tampur Formation an important part of the North Sumatra Basin system. Formation deposition began during Early Eocene to Early Oligocene and regionally comprises limestone and dolostone as the oldest Tertiary sediments in North Sumatra Basin. This formation has served as a gas reservoir as in Peutu Formation in the Alur Siwah Field, East Aceh. This study was conducted using samples collected along the Tampur River, North Sumatra Basin stratigraphic expeditions with PT. ETTI in 2011. Samples were slashed (blue stain) in order to analyze to determine the petrographic diagenesis of the carbonate Tampur Formation. The samples used in this study were ZT 1 thru ZT-7. Thin-section analysis of the samples showed a massive basic carbonate mud that experienced recrystallization and spary calcite dolomitization. In addition to the thin sections there is also a fracture that has been occupied by the mineral calcite and dolomite recrystallization. Dolomitization process that occurred in the Tampur Formation generated porosity between dolomite minerals. Thus, Tampur Formation dolomites have potential to be developed as a fractured reservoir in North Sumatra Basin.