The Control of Fracturing and Dolomitisation on 3D Reservoir Property Distribution of the Asmari Formation (Oligocene-Lower Miocene), Dezful Embayment, SW Iran

The Asmari Formation (Oligocene-early Miocene) is the most<br>important reservoir in the oilfields in the Zagros foreland of<br>the Dezful Embayment of SW Iran. The carbonate reservoirs<br>of the Asmari Formation are characterized by low matrix<br>permeability, and effective drainage is dependent on the<br>occurrence of open fractures. The fractures have been formed<br>during the Zagros Orogeny since late Miocene, which is also<br>responsible for the geometry and formation of NW-SE<br>trending anticlinal traps. Dolomitisation is another factor<br>controlling reservoir qualities as dolostones in general have<br>higher porosities than limestones.