karst

Due to overpumping groundwater, hazard of mantled karst collapse may often take place there.

因过量抽取下水，造成覆盖型岩塌陷灾害。

The later period of karst corrosion deposit experienced lateritization, had accomplished the red clay basic characteristic.

岩残余堆积物后期又经历红土作用，造就了红粘土的基本特征。

Moreover, two types of cements of limnic calcite and limnic dolomite and hydrothermal dolomite of reburial period are included in the karst rocks.

岩岩中发育有淡水方解石和淡水白云石2种胶结物类型，以及再埋藏期沉淀的热白云石。

The karst depression belongs to the accumulative area of surface water and subdrainage area of subsurface water, the karstification is relatively week, and reservoirs are undeveloped.

岩斜坡和岩洼为表水汇集区及下水排泄区，岩作用相对较弱，储层不发育。

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.

该气藏的构造为道冲构造侵蚀而成的残丘山,储集体为奥陶系碳酸盐岩蚀缝洞孔体系,流体呈层状分布(集中分布于奥陶系峰峰组和上马家沟组上段)。