吐哈盆地红台地区辫状河三角洲砂岩储层微观特征

从岩心观察和工区200余块样品的薄片分析入手，通过蔡斯图像分析系统（AxioVision4．0）对吐哈盆地红台地区辫状河三角洲砂岩微观储层特征进行了研究，将目的层储层划分为A～E型5种孔隙结构类型，并对各类孔隙结构进行了逐一评价。结果表明：吐哈盆地红台地区辫状河三角洲砂岩储层的碎屑组分成分成熟度低，结构成熟度低，填隙物主要为粘土杂基和碳酸盐矿物胶结物，属长石岩屑砂岩及岩屑砂岩；工区内发育多种成岩作用，主要为压实作用、胶结交代作用以及溶解、溶蚀作用等，塑性颗粒的变形、碳酸盐胶结以及石英次生加大、方解石交代碎屑组分、溶蚀现象等均比较普遍。对各种孔隙结构类型的参数分析结果表明，三角洲平原河道砂岩储层性能优于前缘水下分流河道砂岩储层。

Sandstone reservoir microscopic characteristics of braid delta of Hongtai area in Tuha Basin

Based on the core observation and thin section analysis of 200 cores,the sandstone reservoir microscopic characteristics of braid delta of Hongtai area in Tuha Basin were investigated by image analysis systern(AxioVision4.0).The pore structure was classified into five kinds of A-E,and the pore structures of all the types were evaluated.The results show that the compositional maturity and the textural maturity of detrital component are low in this area,and the interstitial materials of detrital component are...