三塘湖盆地二叠纪芦草沟组分布及其意义
The distribution and significance of Lucaogou Formation of Permain in Santanghu basin
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摘要: 三塘湖盆地主要生油层系和储集层系——二叠纪芦草沟组,与准噶尔盆地南缘的芦草沟组和吐哈盆地的塔儿朗组沉积非常相似,在岩性和生物群上均可对比,对油气勘探具有重要意义。但其分布受地质情况及研究手段的限制,一直存在很大争议。笔者通过野外剖面、井下剖面对比,详尽地描述了二叠纪芦草沟组的岩石组合特征。通过对区域构造、沉积相及沉积环境的分析,结合古生物资料及测年数据,认为三塘湖盆地二叠纪芦草沟组仅残存于马朗凹陷全区和条湖凹陷南缘冲断带。Abstract: Lucaogou Formation of Perma in as the main oil-source layer and reservoior in Santanghu basin is similar to the Lucaogou Formation in the south of Junggar's basin and the Ta'erlang Formation in Tuha basin. Comparing to each other in lithology and biologic a ssemblage,it is important for petroleum exploration. However,its distribution has been disputed by the limitation of the geological condition and study means. According to the lithology combination characteristics of field section and blow-surface section,Lucaogou Formation of Perma in only distributes in Malang depression and the south of Tiaohu depression.
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Key words:
- San tanghu basin /
- Lucaogou Formation /
- Permain /
- Malang depression /
- Tiaohu depression
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