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Orphan basin
The Orphan Basin is an area approximately 400 km east-north-east of St. John's, NL. Two exploratory oil wells have been drilled there as it is estimated to have oil reserves of 6-8 billion barrels. Chevron intends to drill a third well in 2012.
==Introduction==
Taking its name from a nearby geographical feature of the Atlantic Ocean known as the Orphan Knoll, the Orphan Basin lies just to north and is contiguous to the Grand Banks of Newfoundland. A wide Mesozoic rift zone, the Basin spans 160,000 square kilometres and has been studied and explored by the oil & gas companies ExxonMobil, Chevron, Imperial Oil, and Shell Canada. The presence of Late Jurassic sedimentary formations (i.e. source rock) similar to those found in the fruitful nearby Jeanne d'Arc Basin make this of particular interest to oil exploration. In contrast to this, by 2004 the area still remained one of the least explored Mesozoic Atlantic oceanic basins.
The basin is divided into three areas for exploration purposes based on ocean water depth, namely: Shallow Water (200-500 metres), Intermediate Water (500-1500 metres), and Deepwater (1500-3000 metres). These areas span west to east. 〔
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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