鄂尔多斯盆地东南部山西组沉积特征

发布时间：2018-05-17 01:03

本文选题：沉积模式 + 沉积特征　；参考：《东北石油大学学报》2017年03期

【摘要】：根据薄片观察及粒度分析、野外露头及岩心观察,分析鄂尔多斯盆地东南部山西组的岩石学特征、水动力条件,以及宏观和微观沉积特征,划分岩相类型和岩相组合,建立该区三角洲前缘沉积模式。结果表明:鄂尔多斯盆地东南部山西组沉积粒度偏细,分选好,水动力条件以牵引流为主;三角洲前缘沉积特征明显,且沉积地形坡度较缓;划分7种岩相类型和3种岩相序列组合。研究区整体表现为三角洲前缘沉积特征,主要发育水下分流河道、水下分流间湾、分流河口砂坝3种微相。该结果为鄂尔多斯盆地东南部山西组天然气精细勘探开发提供参考。
[Abstract]:According to thin slice observation and grain size analysis, field outcrop and core observation, the petrological characteristics, hydrodynamic conditions, macroscopic and microscopic sedimentary characteristics of Shanxi formation in the southeast of Ordos Basin are analyzed, and lithofacies types and lithofacies assemblages are classified. The delta front sedimentary model is established in this area. The results show that the sedimentary granularity of Shanxi formation in the southeast of Ordos Basin is fine, the separation is good, the hydrodynamic condition is mainly traction current, the sedimentary characteristics of delta front are obvious, and the gradient of sedimentary topography is relatively slow. There are 7 lithofacies types and 3 lithofacies sequence assemblages. There are three microfacies in the study area: underwater distributary channel, underwater distributary bay and distributary estuary bar. The results provide a reference for the fine exploration and development of natural gas in Shanxi formation in the southeast of Ordos Basin.
【作者单位】：陕西延长石油(集团)有限责任公司研究院;中国地质大学(北京)能源学院;
【分类号】：P618.13

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