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Chicontepec Formation
The Chicontepec Basin (Chicontepec Formation) is a petroleum system in Mexico north-east of Mexico City, covering an area of around in the states of Veracruz, Puebla and Hidalgo. Several oil fields have been discovered in that area since 1926. A major field was discovered in 1973 but contains extra heavy crude, which due to special refining needs is considered unviable at this time. Since that time, tiny amounts of oil have been produced.〔(About 2500 b/d in 2002 according to ) 〕 While the reserves are overwhelmingly extra heavy crude, pockets of lighter tight oil, as well as natural gas, are also found in the basin.〔World oil, Nov. 2001 Vol. 222 No 11〕
== Overview ==
Chicontepec Basin contains Mexico's largest certified hydrocarbon reserve, totaling more than of oil equivalent with original oil in place of over of oil equivalent; recovery is complicated by challenging, low recovery rate reservoirs, but is made more attractive due to the presence of light and super-light crude oil.〔http://www.eluniversal.com.mx/notas/577412.html〕 In 2003, PEMEX said it could take total investment of $30 billion over 15 years to fully develop Mexico's oil and gas reserves in the Chicontepec Basin. The project would require drilling 13,500 wells in the basin, much more than the total number of oil wells now producing in the country.〔Sergio Solache, 17 February 2007, Arizona Republic, claims that "Pemex now has more than 5,000 wells in production"〕 This situation is interesting as the oil wells would be numerous and small. It would be necessary to get permission to drill from the communities on the surface. Fortunes might be made by private firms in the pre-exploratory negotiating phase.
In addition to being economically and technically challenging, the basin's development also faces political difficulty, because the overlying land surface is densely populated,〔(Gov´t strives to save oil field - El Universal - Mexico News )〕 and inhabited by the Otomi people. Despite these difficulties, Pemex urgently needs production from Chicontepec to offset the rapid production decline in its main offshore field, Cantarell.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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