残丘

It's a residual mountain(unaka) which were a set of thrust blocks under the erosion unconformity.It's reservoir pore space is a fracture-vug-pore system of Ordovician carbonate karst.

该气藏构造为道冲构造侵蚀而成山,储集体为奥陶系碳酸盐岩溶蚀缝洞孔体系,流体呈层状布(集中布于奥陶系峰峰组和上马家沟组上段)。