关键词: 火山岩储层, 储集空间, 孔喉特征, 裂缝密度

Abstract: Several analysis methods such as casting slice, scanning electron microscope, porosity and permeability data, mercury injection data and density of fissures are used to study the reservoir properties of volcanic rocks in Huang-Yu-Re area, the east sag of Liaohe basin. Volcanic rocks in this area are mainly composed of basalt, diabase, tuff and trachyte. The dominating type of volcanic reservoir space includes secondary solution pores and structural fissures. It is proved by the result of oil test that the combination of such three parameters as the density of fissures, porosity data and permeability data can be used to evaluate the quality of reservoirs in Huang-Yu-Re area more exactly, among which the density of fissures is the leading reference for the evaluation. The capability of the reservoir in Huang-Yu-Re area is highly improved by fissures which are mainly caused by the action of the fault. The definition of special type of reservoir, whose general property is not very good but the density of fissures is very high, is significant to the evaluation of reservoir of the whole area.

Key words: volcanic rock reservoir, reservoir space, pore throat characteristic, fissure density