South Pars/North Dome Gas-Condensate field

The South Pars/North Dome field is a natural-gas condensate field located in the Persian Gulf. It is by far the world's largest natural gas field. Iran and Qatar share ownership of the field. According to the International Energy Agency (IEA), the field holds an estimated 1800e12cuft of in-situ natural gas and some 50Goilbbl of natural gas condensates. On the list of natural gas fields it has more recoverable reserves than all other fields combined. It has significant geostrategic influence.This gas field covers an area of, of which (South Pars) is in Iranian territorial waters and (North Dome) is in Qatari territorial waters.Field geologyDepth: below the seabedWater depth: The field consists of two independent gas-bearing formations, Kangan and Upper Dalan . Each formation is divided into two different reservoir layers, separated by impermeable barriers. The field consists of four independent reservoir layers K1, K2, K3, and K4.The K1 and K3 units are mainly composed of dolomites and anhydrites while K2 and K4, which constitute major gas reservoirs, comprise limestone and dolomite. A massive anhydrite separates the K4 from the underlying K5 unit which has poor reservoir qualities. The gross pay zone in the South Pars field is approximately 450 m thick, extending from depths of approximately 2750 to 3200 m. Reservoir strata dip gently to the NE. The average thickness of the reservoir units declines from South Pars to North field. As in other reservoir structures in neighboring areas, the reservoir in the Qatar Arch is cut by a set of NNW-SSE trending faults. Diagenesis has a major effect on reservoir quality of the Field.