Abstract:

Metamorphic reservoir fractures in low buried hill in the west part of Jing'anpu,Damintun Depression are primarily high angle fractures.The evolution of the fractures underwent Late Mesozoicearly and middle Early Tertiary forming stage and the late Early Tertiary forming stage.Since matrix porosity of the reservoirs is only 1%～5%,and the permeability is 1×10^-3 μm²,tectonic fractures are the main reservoir spaces and migration paths of the metamorphic reservoirs.The formation of the fractures was affected by lithologic features,faults,burial depth and paleoaeolation.In general,the reservoir property of weathered zones in the buried hill may be not so good.

Key words: buried hill, metamorphic rock, fracture, physical property, influence factor