Ordos Basin; southeast part; Yanchang Formation; sedimentary facies.

鄂尔多斯盆地；东南部；延长组；沉积相。

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Yanchang 2 formations are deltaic deposits during disappearing of lake-basin.

长2组即是在湖盆消亡时期形成的一套三角洲沉积。

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There are many sequence stratigraphic classification project of Yanchang formation in Ordos basin.

鄂尔多斯盆地三叠系延长组地层层序划分方案较多。

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In 2005 county officials struck a deal with Yanchang, the regional state-owned oil company, to assume control of the wells.

ECONOMIST: In rural China, a private oil boom became a state-owned one

Wang Zhihua is now a Yanchang executive.

ECONOMIST: In rural China, a private oil boom became a state-owned one