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Ghawar Field

 

Ghawar Field

Ghawar Field
Ghawar Field is located in Saudi Arabia
Ghawar Field
Location of Ghawar Field
Country  Saudi Arabia
Region Eastern Province
Location Al-Ahsa
Offshore/onshore Onshore
Coordinates
Operator Saudi Aramco
Field history
Discovery 1948
Start of production 1951
Peak year 2005 (Contested)
Production
Current production of oil 5,000,000 barrels per day (~2.5×10^8 t/a)
Current production of gas 2,000×10^6 cu ft/d (57×10^6 m3/d)
Estimated oil in place 71,000 million barrels (~9.7×10^9 t)
Estimated gas in place 110,000×10^9 cu ft (3,100×10^9 m3)
Producing formations Upper/Middle Jurassic, Upper/Lower Permian, Lower Devonian
External images
Ghawar Field map and regional setting
Regional cross section through Ghawar
Total Wells at Ghawar. Blue wells are waterflood injectors, red are production wells.

Ghawar (Arabic: الغوار) is an oil field located in Al-Ahsa Governorate, Eastern Province, Saudi Arabia. Measuring 280 by 30 km (174 by 19 mi), it is by far the largest conventional oil field in the world,[1] and accounts for more than half of the cumulative oil production of Saudi Arabia. [2] Ghawar is entirely owned and operated by Saudi Aramco, the state run Saudi oil company. Relatively little technical information is publicly available, because the company and Saudi government closely guard field performance data and per-field production details. Available information is predominantly historical (pre-nationalization), from incidental technical publications, or anecdotal.

Contents

  • Geology 1
  • History 2
  • Production 3
  • Reserves 4
  • See also 5
  • References 6
  • Further reading 7
  • External links 8

Geology

Ghawar occupies an seal is an evaporitic package of rocks including impermeable anhydrite. [3]

History

Historically, Ghawar has been subdivided into five production areas, from north to south: 'Ain Dar and Shedgum, 'Uthmaniyah, Hawiyah and Haradh. The major oasis of Al-Ahsa and the city of Al-Hofuf are located on Ghawar's east flank, corresponding to the 'Uthmaniyah production area. Ghawar was discovered in 1948 and put on stream in 1951.[1] [4] Some sources claim Ghawar peaked in 2005, though this is strongly contested by the field operators.[5][6]

Saudi Aramco reported in mid-2008 that Ghawar had produced 48% of its proven reserves. [7]

Production

Approximately 60–65% of all Saudi oil produced between 1948 and 2000 came from Ghawar. Cumulative production through early 2010 has exceeded 65 billion barrels (1.03×1010 m3).[2] It was estimated that Ghawar produced about 5 million barrels (790,000 m3) of oil a day (6.25% of global production) in 2009.[8]

Ghawar also produces approximately 2 billion cubic feet (57,000,000 m3) of natural gas per day.[9]

The operators stimulate production by waterflooding, using seawater at a rate said to be around 7 million gal./day. [10] Water flooding is said to have begun in 1965. [11] The water cut was about 32% in 2003, and ranged from about 27% to 38% from 1993 to 2003. [12]

Reserves

In April 2010, Saad al-Treiki, Vice-President for Operations at Aramco, stated, in a news conference reported in Saudi media, that over 65 billion barrels (10.3 km3) have been produced from the field since 1951. Treiki further stated that the total reserves of the field had originally exceeded 100 billion barrels (16 km3)[13]

The International Energy Agency in its 2008 World Energy Outlook stated that the oil production from Ghawar reached 66 Bbo in 2007, and that the remaining reserves are 74 Bbo. [8]

Matthew Simmons, in his 2005 book Twilight in the Desert, suggests that production from the Ghawar field and Saudi Arabia may soon peak.[14]

When appraised in the 1970s, the field was assessed to have 170 billion barrels (27 km3) of original oil in place (OOIP), with about 60 billion barrels (9.5 km3) recoverable (1975 Aramco estimate quoted by Matt Simmons). The second figure, at least, was understated, since that production figure has already been exceeded.[14]

See also

References

  1. ^ a b
  2. ^ a b
  3. ^ Finding Ghawar: Elephant Hid in Desert By Rasoul Sorkhab, AAPG Explorer, June 2011
  4. ^
  5. ^
  6. ^
  7. ^
  8. ^ a b The King of Giant Fields by Rasoul Sorkhab, GeoExPro Issue 4, Volume 7, 2010
  9. ^
  10. ^ Saudi Arabia's Giant Ghawar Oil Field, Global Resources News
  11. ^ Ghawar Oil Field: Saudi Arabia's Oil Future by Justin Williams, February 19th, 2013
  12. ^ Source: A.M. Afifi, 2004 AAPG Distinguished Lecture, chart reproduced in Rasoul Sorkhab, 2010.
  13. ^
  14. ^ a b

Further reading

  • Arabian American Oil Company Staff, "Ghawar Oil Field, Saudi Arabia", Bulletin of the American Association of Petroleum Geologists, Vol 43, No. 2 (February, 1959), pp 434-454. Still the basic public reference for Ghawar geology.

External links

  • A theoretical look at the future of the field
  • Articles on Ghawar and analysis on its reserves from The Oil Drum
  • Terrorists and Ghawar
  • Saudi Aramco official website (source of most data in this article).
  • World-beater Ghawar a field apart, 2008 article in Saudi Aramco Dimensions magazine
  • Map of oil and gas infrastructure in Saudi Arabia
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