徐深气田火山岩储层岩石物理相分类及其应用

Classification of petrophysical facies of the volcanic rock in Xushen gas field and its application

阐述了岩石物理相分类方法,应用该方法对徐深气田中基性火山岩气藏储层进行了归类,通过对39块样品岩心分析渗透率与测井计算渗透率对比,平均绝对误差为0.12×10-3μm2,相对误差为53%。同时,应用该方法对研究区酸性火山岩储层进行了划分与渗透率计算.结果表明:相同孔隙度对应的酸性火山岩渗透率值比中基性火山岩的大;发育酸性火山岩储层的自然产能比中基性火山岩的高.

This paper expounds the petrophysical facies classification method which has been used to classify neutral basic volcanic gas reservoirs in Xushen gas field. By comparing the core permeability from 39 samples and calculating the permeability of logging, we find that mean absolute error is 0.12×10-3 μm2, and relative error is 53%. Meanwhile, we have completed classification and permeability calculation of acid volcanic reservoirs with the method in the studied area. The results show that permeability of acidic volcanics is higher than that of neutral basic volcanic rocks’ at the same porosity and natural deliverability of developed acidic volcanics is higher than that of bleached alteration zones.