The Middle-Lower Jurassic to the west of Ejin Qi-Alxa Youqi, and the Lower Cretaceous in the northwest part of the corridor, Zongnan and Zongbei De-pressions have better oil potential.
额济纳旗-阿拉善右旗一线以西的中下侏罗统、走廊坳陷北段及宗南、宗北诸坳陷的下白垩统含油气远景较好。
2
Oil of Jurassic and Cretaceous stratum in South central section comes from Wuerhe hydrocarbon source rock, and belongs to the mature crude oil.
中南段侏罗系和白垩系的油属于偏腐殖型成熟原油，来自乌尔禾组烃源岩。
3
The three major rock systems of the Mesozoic era, the Triassic, Jurassic and the Cretaceous are notable oil-producing systems.