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老第三系 [lǎo dì sān xì]
[地质] Paleogene system
- 板桥凹陷位于黄骅坳陷中北部，老第三系沙河街组沙三段是主要生储油岩系。
The Banqiao sag lies in the middle northern part of the Huanghua Depression, and the third member of Shahejie Formation is the main oil generating strata and reservoirs in the area. - 板桥凹陷位于黄骅坳陷中北部 ，老第三系沙河街组沙三段是主要生储油岩系。
Depositional system and sequence stratigraphy of the third member of Shahejie Formation in Wenxi fracture belt, Dongpu Depression; - 泌阳断陷沉积了巨厚的老第三系稳定的湖相水下沉积，深凹区是主要的生油区，地层极平缓。
The layers in the deep depression which was the main oil source area are almost horizontal.
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