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: ''For the plant known as Burgan, see Kunzea ericoides''. The onshore supergiant Burgan field is an oil field situated in the desert of southeastern Kuwait. Burgan field can also refer to the Greater Burgan—a group of three closely spaced fields, which includes Burgan field itself as well as the much smaller Magwa and Ahmadi fields. Greater Burgan is the world's largest sandstone oil field, and the second largest overall, after Ghawar. ==Discovery and geology== A natural surface oil seep above the Burgan field was known to humankind since neolithic time, bituminous material from a reed boat discovered in As-Sabiyah/North Kuwait and dated 5000 BC have been traced back to this seep.((Connan et al, 2005) ) The subsurface reservoirs of the Burgan oil field were discovered in February, 1938. The US and UK-owned Kuwait Oil Company began commercial oil production at Burgan in 1946.〔 The Greater Burgan, a wider area around Burgan, is the world largest sandstone (clastic) oil field with the total surface area of about 1000 km2. It includes three producing subfields: Burgan itself (500 km2), Magwa (180 km2) and Ahmadi (140 km2).〔 The Burgan field's structure is an anticlinal dome having an elliptical shape and transected by numerous radial faults. Both Magwa and Ahmadi are located on smaller, subsidiary domes north of Burgan 〔(The Great Burgan Field, Kuwait ) by Rasoul Sorkhabi, GeoExpro Volume 9, Issue 1, 2012〕 The oil is contained in the four main horizons of Cretaceous age: Wara (sandstone), Mauddud (limestone), Burgan Third Sand (3S) and Burgan Fourth Sand (4S). Burgan Third Sand is in turn subdivided into Third Sand Upper (3SU), Third Sand Middle (3SM) and Third Sand Lower (3SL). Historically the production has come mainly from the 3SM unit. By 1992 the second and third sand units had been swept by water.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Burgan field」の詳細全文を読む スポンサード リンク
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