本文根据大庆油田各套油层砂岩中36块岩心样品所做 x 射线衍射粘土矿物定量分析和扫描电子显微镜研究,按伊利石晶体形态演变特征,分为三类:类型Ⅰ——叶片状伊利石,类型Ⅱ——瘤状、短纤维状伊利石及类型Ⅲ——条片状、纤维状或毛发状伊利石。对各类伊利石的成因,与成岩阶段的关系,及其对储集层的影响等进行了探讨。 Based on the quantitative analysis of x-ray diffraction clay minerals and the scanning electron microscope (SEM), 36 core samples from various oil-bearing sandstone reservoirs in Daqing Oilfield are classified into three types according to the morphological characteristics of illite crystals: type I- leaf-shaped illite, Type II - tumor, short fibrous illite and type III - strip, fibrous or hair-like illite. The causes of all kinds of illite, the relationship with diagenesis stages and its influence on reservoirs are also discussed.