The reservoir rocks are Archaean granite, Lower Paleozoic carbonate rocks, Mesozoic sand rock and volcanic rock and fracture, solution cavities and pores are the major preserving spaces.

• 储集层由太古界变质岩、下古生界碳酸盐岩和中生界砂岩、火山岩组成，储集空间主要为构造裂缝及溶蚀孔隙；