North Gas Field
| South Pars / North Dome Field | |
|---|---|
 |
|
| Country |
Iran Qatar |
| Location | Persian Gulf |
| Offshore/onshore | Offshore |
| Coordinates | 26°37′08.85″N 52°04′04.67″E / 26.6191250°N 52.0679639°ECoordinates: 26°37′08.85″N 52°04′04.67″E / 26.6191250°N 52.0679639°E |
| Operators |
Qatar Petroleum SPGC |
| Field history | |
| Discovery | 1971 |
| Start of production | 1989 |
| Production | |
| Peak of production (gas) | 60,000 million cubic feet per day (1,700×106 m3/d) |
| Estimated gas in place | 1,800,000×109 cu ft (51,000×109 m3) |
| Recoverable gas | 1,260,000×109 cu ft (36,000×109 m3) |
| Producing formations | Kangan (Triassic) Upper Dalan (Permian) |
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 gas field, shared between Iran and Qatar. According to the International Energy Agency (IEA), the field holds an estimated 1,800 trillion cubic feet (51 trillion cubic metres) of in-situ natural gas and some 50 billion barrels (7.9 billion cubic metres) 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 9,700 square kilometres (3,700 sq mi), of which 3,700 square kilometres (1,400 sq mi) (South Pars) is in Iranian territorial waters and 6,000 square kilometres (2,300 sq mi) (North Dome) is in Qatari territorial waters.
The field consists of two independent gas-bearing formations, Kangan (Triassic) and Upper Dalan (Permian). 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 (the Nar Member) 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 (some 450 metres (1,480 ft)) to North field (385 metres (1,263 ft)). 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.
The field is a part of the N-trending Qatar Arch structural feature that is bounded by the Zagros fold and thrust belt to the north and northeast.
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Wikipedia