Ahwaz

AHWAZ (RU: Ахваз) is the oil field within Iran, one of the largest ones within the world. It belongs to the Persian Gulf oil-and-gas-bearing basin. It has been discovered during the 1958, and is being developed since the same year. The initial industrial reserves of the oil are 1215 million tonnes, of the gas are 311 billion cubic metres. It is confined to the asymmetric anticlinal fold with the size of 75x6 kilometres. There are productive the sandstones of the Asmari (formation) stratigraphic suite (Oligocene - Lower Miocene), and the limestones of the Bangestan (formation) stratigraphic suite (Upper Cretaceous) at the depths of 1560 and 3100 metres. The major extraction is conducted from the Asmari sandstones. The collector is granular, the permeability is 5000-8000 millidarcies. The tabular vaulted reservoir has the gaseous cap. The density of the oil is 863 kilograms per cubic metre, the content of S is 1.5%. There are being operated 72 gushing oil wells, the annual extraction is 56.5 million tonnes (1978); the cumulative extraction is 400 million tonnes (1979). There exist the oil pipelines to the Abadan and Tehran cities. It is being developed by the "National Iranian Oil Company" governmental company.