In 1957, an oil field was discovered in the vicinity of Villahermosa, the capital of Tabasco state in southern Mexico, with an oil layer in the Miocene sandstone of the Tertiary period. Later, with the advancement of drilling technology, deeper drilling began in 1971, and the following year, two exploratory wells succeeded in discovering a Cretaceous (and partly Jurassic) limestone oil layer. The Reforma oil field is the collective name for the 25 oil fields producing from this layer, a group of super-giant oil fields with an oil production area of 70 km x 100 km. The ultimate recoverable reserves of the Reforma oil field are not very accurate, but are estimated to be more than 7 billion barrels. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
メキシコ南部,タバスコ州の州都ビジャエルモサ周辺では,1957年に第三紀中新世砂岩を油層とする油田が発見された。その後,掘削技術の進歩により71年に着手された深掘りの結果,その翌年に2試掘井において白亜系(一部ジュラ系)の石灰岩油層の発見に成功した。この層から生産している25油田の総称がレフォルマ油田で,70km×100kmの産油面積をもつ超巨大油田群である。レフォルマ油田の究極可採埋蔵量はあまり正確ではないが,70億バレル以上と推定される。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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