以红河油田长6段砂岩储层为研究对象,通过对研究区取心井的观察和对样品进行离散分析、C-M粒度图分析以及粒度概论曲线分析,得出长6储层砂岩的粒度特征,为分析储层沉积体系提供重要依据。分析结果表明,该储层主要为中—细粒长石岩屑砂岩,颗粒粒度集中在0.05~0.3 mm之间,分选中等—较差,将粒度概率曲线分为“高斜两段式”、“上拱弧形式”、“低斜两段式”、“一高一低两段式”四种样式,分别对应流能量降低、快速堆积、强水动力等水动力条件。 Taking the sandstone reservoir of Chang 6 section in Honghe Oilfield as the research object, the grain size characteristics of sandstone in Chang 6 reservoir are obtained through the observation of the coring wells in the study area, the discrete analysis of the samples, the analysis of the CM granularity and the curve analysis of the granularity. It provides an important basis for analyzing reservoir sedimentary system. The results show that the reservoirs are mainly medium-fine feldspar lithic sandstone with particle size of 0.05-0.3 mm, medium-poor sorting, and the probability distribution of particle size distribution into “high oblique two-stage ”, “ Arc on the arch ”, “ low oblique two-stage ”, “ one high and one low two-stage ”four styles, corresponding to the flow energy reduction, rapid accumulation, strong hydrodynamic Hydrodynamic conditions.