轮南地区奥陶系碳酸盐岩岩溶发育模式

Karst Development Mode of Ordovician Carbonate Rocks in Lunnan Swell in Tabei Area, Tarim Basin

塔里木盆地寒武-奥陶系大面积的台地相沉积为轮南地区后期岩溶储集层发育提供了基础,多旋回、多期暴露,形成了多种类型的岩溶:潜山暴露岩溶、顺层承压水岩溶、准同生期层间岩溶、混合水岩溶等。构造活动对岩溶发育及其储集层形成、分布具有决定性作用。

The large area of platform-facies deposits of the Cambro-Ordovician in Tarim basin provides foundation for the post-karst reservoir development in Lunnan area,which can be classified as the buried-hill exposure karst,bedding confined water karst,penecontemporaneous interlayer karst and commingled water karst,etc.,with multi-cycle and multi-stage exposure features.The study shows that tectonic movement is of crucial effect on the karsts development and related reservoir formation in this area.