The carbonatite reservoir of Ordovician weathered crust in Shanganning Basin belongs to palaeokarst and its main reservoir spaces are denudation vugs.

 
  • 陕甘宁盆地中部奥陶系风化壳碳酸盐岩储集层属于古岩溶型,主要储集空间是溶蚀孔洞。
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