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The South Pars / North Dome field is a natural gas condensate field located in the Persian Gulf. It is the world's largest gas field, shared between Iran and Qatar.〔IEA, World Energy Outlook 2008 - Chapter 12 - Natural gas resources and production prospects, p.298〕 According to the International Energy Agency (IEA), the field holds an estimated of in-situ natural gas and some of natural gas condensates.〔http://www.payvand.com/news/10/jun/1138.html〕 This gas field covers an area of , of which (South Pars) is in Iranian territorial waters and (North Dome) is in Qatari territorial waters.〔(CEDIGAZ:Current status of the World's gas giants )〕 ==Field geology== *Depth: below the seabed〔http://www.offshore-technology.com/projects/southpars/〕 *Water depth: 〔 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.〔("Gas Prospective Areas in the Zagros Domain of Iran and in Persian Gulf Iranian Waters" ). • Search and Discovery. • (PDF)〕 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.〔H. Rahimpour-Bonab, B. Esrafili-Dizaji, V. Tavakoli (2010) DOLOMITIZATION AND ANHYDRITE PRECIPITATION IN PERMO-TRIASSIC CARBONATES AT THE SOUTH PARS GASFIELD, OFFSHORE IRAN: CONTROLS ON RESERVOIR QUALITY. http://onlinelibrary.wiley.com/doi/10.1111/j.1747-5457.2010.00463.x/abstract〕 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 ) 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.〔V. Tavakoli, H. Rahimpour-Bonab, B. Esrafili-Dizaji (2011) Diagenetic controlled reservoir quality of Southnext termprevious termParsnext term gas field, an integrated approach. http://www.sciencedirect.com/science/article/pii/S1631071310002191〕 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.〔Jafar Aalia, Jafar., Hossain Rahimpour-Bonaba and Mohammad Reza Kamali. • ("Geochemistry and origin of the world's largest gas field from Persian Gulf, Iran" ). • ''Journal of Petroleum Science and Engineering''. • (Volume 50, Issues 3-4). • March 16, 2006, • pp.161-175.〕 In the field, gas accumulation is mostly limited to the Permian–Triassic stratigraphic units. These units known as the Kangan–Dalan Formations constitute very extensive natural gas reservoirs in the field and Persian Gulf area, which composed of carbonate–evaporite series also known as the Khuff Formation.〔 Permian–Early Triassic has been divided into Faraghan (Early Permian), Dalan (Late Permian) and Kangan (Early Triassic) Formations.〔 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「South Pars / North Dome Gas-Condensate field」の詳細全文を読む スポンサード リンク
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