鄂尔多斯延长气田铝土岩分布规律及其地质意义

发布时间：2018-05-28 16:02

本文选题：延长气田 + 铝土岩　；参考：《西安科技大学学报》2016年06期

【摘要】：鄂尔多斯盆地延长气田本溪组底部发育一套铝土岩,通过野外调查、岩心观察及测井曲线识别,明确了延长气田本溪组铝土岩物化特征及分布规律,并在此基础上结合区域地质背景探讨了延长气田本溪组铝土岩的出现对资源勘查的意义。研究认为:铝土岩的富集与奥陶系风化壳古地貌的发育有密切关系,通过铝土岩分布规律的认识有助于风化壳古地貌的重建;伽马能谱测井表明延长气田铝土岩中有明显的铀化矿异常,为盆地铀资源的勘查提供了新的方向;作为不整合面的重要产物,铝土岩成为下覆奥陶系气藏的区域盖层,通过铝土岩分布规律的研究对下伏气藏勘探起到了指导意义。
[Abstract]:A set of bauxite is developed at the bottom of Benxi formation in Yanchang gas field, Ordos Basin. Through field investigation, core observation and logging curve identification, the physicochemical characteristics and distribution law of bauxite in Benxi formation of Yanchang gas field are determined. On this basis, the significance of bauxite in Benxi formation of Yanchang gas field for resource exploration is discussed in combination with regional geological background. It is considered that the enrichment of bauxite is closely related to the development of paleogeomorphology of the weathering crust of Ordovician system, and the understanding of the distribution law of bauxite is helpful to reconstruct the paleogeomorphology of weathering crust. Gamma-ray spectroscopic logging shows that there are obvious uranium ore anomalies in bauxite in Yanchang gas field, which provides a new direction for the exploration of uranium resources in the basin, and as an important product of unconformity surface, bauxite has become the regional cap of the lower Ordovician gas reservoir. The study on the distribution of bauxite plays a guiding role in the exploration of underlying gas reservoirs.
【作者单位】：西安石油大学地球科学与工程学院;
【基金】：鄂尔多斯盆地多种能源综合调查评价(编号12120114009201)资助中国地质调查局地质调查计划项目(12120115003201-01)
【分类号】：P618.13

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