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

μm

2

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.