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The Adar oilfield, also known as the Adar Yale, Adar Yeil or Adaril field, is an oilfield situated in the Melut Basin in South Sudan estimated to contain about of oil. The Chevron Corporation discovered the Adar Yale field in 1981, shortly before the start of the Second Sudanese Civil War (1983–2005). Soon after Chevron had suspended operations in 1984, Sudanese government troops began attacking civilian settlements in the area, burning the houses and driving the people away, and in the late 1990s, Nuer militias from Nasir helped the army in clearing away the people to make way for the roads and infrastructure of the oilfield. President Omar al-Bashir inaugurated the site in March 1997, and it initially produced just a day. Production from this oilfield, which lies close to the borders with Sudan and Ethiopia, has the potential to bring significant economic benefits to the region.〔 However, until recently the focus has been on clearing the population away from the oilfield rather than on a longer term strategy for developing the region.〔 China has provided a large investment in the Adar oilfield and others in South Sudan and Sudan and has made plans to make extensive further investments.〔 ==Background and location== Adar is an area southeast of Melut, which lies on the White Nile in Upper Nile state, and to the west of Ethiopia. The Khor Adar, which drains the Machar Marshes, flows through the region in a northwest direction to the Nile, which it reaches just above Melut.〔 The Khor Machar swamps lie in a triangle north of the Sobat River and east of the White Nile. When flooded during the wet season, they extend for . The swamps and marshes are fed by local rainfall and by many small torrents from the Ethiopian foothills, which extend for along the eastern border, and by spill water from channels of the Sobat. Discharge from the marshes along the Adar river is low except in years with exceptionally heavy rainfall.〔 Most of the water is lost through evaporation before reaching the Nile. It has been proposed to build a canal from Machar via Adar to the White Nile to increase the volume of water flowing to Northern Sudan and Egypt, which apparently could be done without major environmental impact, but political instability has prevented the project from starting. The Chevron Corporation discovered the Adar Yale field in 1981, shortly before the start of the Second Sudanese Civil War (1983–2005). Four exploratory wells had flow rates that exceeded a day.〔 The oil is held in the Yabus Formation sandstone from the Paleogene age. The field has an area of about but the average pay zone is only . Initially the field was estimated to hold , but Seismic data acquired in 2000 pushed that up to .〔 Also, three small oil pools were discovered south of Adar-Yale with another . Chevron started to pull out of Sudan in 1984 when three of its employees were killed, finally selling all of its Sudanese interests in 1992.〔 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「Adar oilfield」の詳細全文を読む スポンサード リンク
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