柴达木盆地北缘西段古近系路乐河组沉积相特征研究
网络出版日期: 2010-03-15
Sedimentary facies of Paleogene Lulehe Formation in western segment of northern margin of Qaidam Basin
Online published: 2010-03-15
田淑芳 , 张鸿文 . 柴达木盆地北缘西段古近系路乐河组沉积相特征研究[J]. 岩性油气藏, 2010 , 22(1) : 48 -52 . DOI: 10.3969/j.issn.1673-8926.2010.01.009
Based on outcrop observation, core description, well logging and seismic data, the sedimentary facies of Paleogene Lulehe Formation in northern margin Qaidam Basin is analyzed. Five types of seidimentary facies are identified: alluvial fan facies, fan delta facies, braided streamfacies, braided delta facies, lacustrine facies, of which the sedimentary characteristics are studied. The lithology and paleogeography in Paleogene Lulehe Formation indicates that there mainly developed two sets of depositional systemassemblages. Depositional environment attributes to alluvial fanfan delta-lacustrine environment system in Erboliang-Lenghu zone of northwestern Qaidam Basin and alluvial fanbraided stream-braided delta-lacustrine environment systeminMahai-Nanbaxian zone of southeastern Qaidam Basin.
Key words: Weng Cycle; life cycle; proved reserves; increasing trend; life system; prediction; Liaohe Oilfield
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