The source rocks of Ordovician carbonate rocks in the Ordos Basin are mostly Preserved in darkgrey micrite transgtessive system tracts and early-sarge high water-level system tracts.

• 应用层序地层学基本原理对奥陶系碳酸盐岩含油气性的研究表明：一方面构成奥陶系层序格架的不同单元，具有各异的油气地质意义；