Charac-teristics of Low Permeability Conglomerate Reservoir in Xiagou Formation of Lower Creta ceous in Qingxi Oilfield.

The conglomerate reservoir in Xiagou formation of Lower Cretaceous(K 1 g)in Qingxi oilfield is a kind of deep fratural-porous reservoir.Oil pool is usually buried in4200～4600m in depth.The matrix porosity is less than8%,the matrix permeability is less than1×10 -3 μm 2 .Because high-angle fractures are well developed in the reservoir,flowing performance of it is improved.By using some techniques of rock composition,pore type and assemblage,pore structure,NMR,well log and test integrated with the results from fractural planar predic-tion,we make a research in reservoir prediction and get good effects.