摘要
Integrated with core observation,microscopic identification,scanning analysis and imaging logging,this study classified reservoir spaces of the Carboniferous volcanic rocks in the Junggar Basin and described their assemblage characteristics.The results indicate that volcanic reservoir includes three main space types: primary porosity,second porosity and fracture,which can be divided further into 4 types of primary porosity,5 types of second porosity,and 4 types of fracture,and the latter two space types play significantly important roles in improving volcanic reservoir property.Three assemblage models of reservoir spaces are identified :structure fracture-dissolution fracture-dissolution porosity;primary pore-structure fracture-dissolution fracture-dissolution porosity;intercrystalline pore-primary porosity-structure fracture-dissolution porosity.The assemblages of reservoir spaces are characterized by the diversities of type,geometric configuration,distribution and structure as well as low connectivity and highly fracture improving.