...三叠系延长组；油藏；陕北斜坡；鄂尔多斯盆地 [gap=1278]Key words： reservoir forming geochronology，Triassic Yanchang formation，reservoir，north Shaanxi slope，Ordos basin ..
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鄂尔多斯盆地三叠系延长组地层层序划分方案较多。
There are many sequence stratigraphic classification project of Yanchang formation in Ordos basin.
姚店油田北区位于鄂尔多斯盆地陕北斜坡东部，三叠系延长组是其主要的含油层系。
Northern Yaodian Oilfield lies on eastern part of Shanbei Slope in Ordos Basin and the primary oil-bearing bed is Yanchang Formation.
这些特征均表明疑源类是鄂尔多斯盆地三叠系延长组湖相优质烃源岩形成的重要母质。
The lacustrine acritarch is the important biologic source of high-quality source rock of the Yanchang Formation in Ordos Basin.
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