Abstract: By means of such advanced experimental techniques and integrated analysis methods as CT imaging, NMR etc，the authors of the paper study the pore structure and properties of gas water flow in volcanic core. The pore structure of volcanic rock in Daqing is complex, the throat is small and the pore is easy to be restricted by the throat, the throat′s size decides the permeability of the formation, the reservoir space can be classified into three types: pore, fracture and the tight. In different pore structure, there are different reservoir space and properties of gas water flow. The residual water saturation of volcanic rock in Daqing is high and the obvious and properties of gaswater flow is that the fracture core′s two phase flow area is small in fracture core, but the gas also has flow ability under high water saturation, so, the fracture has good flow conductivity. The pore core′s two phase flow area is big, the gas phase permeability is high under residual water saturation, the reservoirphysical property is good, both the two kinds of core′s gas phase permeability decrease quickly as water saturation′s increase.

Key words: volcanic rock, pore structure, gas water flow through porous media, experimental research, Daqing