The Effect Factors and Feature of He-8 and Shan-1 Formations of Permian Reservoir in the Eastern Sulige Gas Field

The eastern Sulige Gas Field is an area around the Sulige Gas Field which has large gas exploration potential.Based on the analysis of cores,slice data,property and capillary pressure curves of He-8 and Shan-1 formations of Permian reservoir in the eastern Sulige Gas Field,It is indicated that the reservoir rocks are dominated by quartz sandstone and-quartz sandstone;the accumulation spaces are dominated by secondary dissolved pore and inter granular micro-pore of He-8 and Shan-1 formation of Permian.It belongs to low-porosity and low-permeability reservoir.The reservoir is influenced by sedimentary facies,quartz content,diagenesis,micro-fractures and the pile of sandbody.Sedimentary facies and lithology control the reservoir property.The diagenesis is a critical factor that effect reservoir.Micro-fractures and the pile of sandbody improve the porosity and permeability of reservoir in a certain extent.