【摘要】 压汞法是测定流纹岩类火山岩储层毛管压力曲线的有效方法之一。介绍压汞法测定毛管压力曲线的基本原理和实验方法,重点对SP气田流纹岩类火山岩储层压汞毛管压力曲线及孔隙结构进行了详细分析,气田流纹岩的压汞毛管压力曲线可以分为三种类型。从孔隙结构来看,由于流纹岩以原生气孔为主,孔喉比很大并且孔隙大小分布不均匀,非均质严重,退汞效率较低,气水过渡带很宽。对孔隙结构特征参数进行对比分析,储集性能好的样品与储集性能差的样品具有很大的差异。压汞毛管压力曲线还可以确定J(Sw)函数、岩石的绝对渗透率、以及渗透率贡献值。更多还原

【Abstract】 Mercury intrusion method is one of effective methods of determining the capillary curve in the volcanic rocks of rhyolite type. The paper introduces the fundamentals and experimentation of mercury - injection method testing capillary curve. It is a focal point to analyze the mercury penetration capillary curve and pore configuration for volcanic rocks of rhyolite type in SP gas field. The analysis which indicates the capillary curve can be classified three types for the volcanic rocks of rhyolite type in SP gas field. seen from pore structure, original gas cavity is major in the rhyolite type, the ratio of pore diameter to pore constriction diameter is large, pore size distribution is heterogeneous, heterogeneity is serious, mercury withdrawal efficiency is low, the gas-water transition zone is very wide. Compared and analyzed for pore structure characteristic parameter, good samples of the reservoir property are quite difference from the bad samples of the reservoir property. Mercury injection capillary curve also can determine the function of J(Sw),rock wetting property, rock absolute permeability, relative permeability and permeability contribution value.更多还原