Gas Flooding a Tight and Heterogeneous Silicilite Reservoir – Quantification of Sweep Efficiency

A21 Gas Flooding a Tight and Heterogeneous Silicilite Reservoir – Quantification of Sweep Efficiency H. Al-Shuraiqi* (Petroleum Development Oman) & V. van Engelen (Petroleum Development Oman) SUMMARY The Al Noor field was discovered in 1989 in the South Oman salt basin. The field is at a depth of 4 km and contains the unique Athel silicilyte. The reservoir has a gross thickness of around 400 m and is fully encased in sealing salt as a result of which the reservoir is geopressured to 80 MPa. The permeability is extremely low (typical 1 – 100 micro-darcy) due to the fact that