老第三系(E)是河南平原地热开发基底，新第三系(N)是主要热储层和开采层。

Eogene System is the fundus of terrestrial heat exploitation and Neogene System is the principal heat reservoir and exploitation bed of Henan plain.

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柴达木盆地西部已找到17个第三系油源的油田，其主要烃源岩层位是陆相始新统下干柴沟组。

In west Qaidm Basin, 17 oilfields with Tertiary source rocks have been found. The main source rocks are Lower Ganchaigou Formation of terrestrial facies of Eocene.

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上新统区域盖层中砂、砾岩含量的变化，控制济阳坳陷南、北方向上第三系地层油藏类型及其含油性的变化。

The variation of the sandstone and conglomerate content in the Miocene to Pliocene regional cap rocks governed the types of the oil reservoirs and their oil contents.

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