GREATER BURGAN (RU: Большой Бурган) is the petroleum field within Kuwait, one of the largest within the world. It belongs to the Persian Gulf petroleum-and-gas basin. It has been discovered during the 1938, is being developed since the 1939. It is confined to the buried dome, which is comprising three uplifts, namely, Burgan, Magwa, and Ahmadi. The total dimensions of the structure are 46x20 kilometres. The reservoirs are tabular vaulted.
The initial industrial reserves of petroleum are 10693 million tonnes. There are industrially petroleum-bearing the sandstones of the Upper (I and II productive horizons) and Lower Cretaceous (III and IV horizons, which are providing 90% of extraction), and also the Lower Cretaceous limestones within the interval of 1080-2600 metres.
The collectors are granular, with the porosity of 20-35%, and with the average permeability of 4000 millidarcies (maximum is 30000 millidarcies). The initial reservoir pressure is 22.5 megapascals, the temperature is 64 degrees Celsius. The density of the petroleum is 868 kilograms per cubic metre, the viscosity is 1.1•10^-2 pascal-seconds; the content of S is 1.5%.
There are operated 484 gushing drilled wells, the annual extraction is approximately 70 million tonnes, the accumulated (by the 1981) extraction is 2400 million tonnes. There exist the petroleum pipelines into the Mina-al-Ahmadi and al-Kuwait cities. It is being developed by the "Kuwait Petroleum Corp." governmental corporation.
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