准噶尔盆地阜康凹陷头屯河组储层物性以低孔低渗为主，填隙物类型多，孔隙结构复杂。潜在酸敏损害与室内评价出现严重矛盾，储层敏感性表现出差异性。通过岩心驱替、铸体薄片鉴定、核磁共振、扫描电镜等岩心实验，开展了储层敏感性评价及控制因素研究。结果表明，头屯河组具有弱速敏性、中等偏强—强水敏性、中等偏强—强盐敏、中等偏强的碱敏性以及弱—中等偏弱酸敏性特征。储层敏感性差异与填隙物类型多，孔隙结构复杂等因素有关；富自生石英（直径小于5 μm）胶结物的头屯河组储层，酸碱液溶蚀表层黏土导致自生石英等晶体从骨架颗粒表面剥离，形成可移动微粒，堵塞孔喉，呈现中偏强—强酸敏、碱敏损害，这种形式的损害机理与传统二次沉淀等损害形式不同。敏感性损害机理表明，各类敏感性具有叠加效应。

The Toutunhe Formation in Fukang Sag, Junggar Basin, is mainly characterized by low porosity and low permeability with many types of fillers and complex pore structures. But there is a serious contradiction between the potential acid sensitivity damage and the indoor evaluation, and the variability exists in the sensitivity of the reservoir. Therefore, the reservoir sensitivity evaluation and control factors are studied by the core experiments such as core displacement, casting thin section identification, nuclear magnetic resonance, scanning electron microscope, etc. The results show that in Toutunhe Formation, the velocity sensitivity is weak, the water sensitivity and salt sensitivity are both upper medium to strong, the alkali sensitivity is upper medium, and the acid sensitivity is weak to moderate weak. The difference of reservoir sensitivity is related to many types of interstitial fillers and complex pore structures. In the Toutunhe Formation reservoir enriched with the cement of authigenic quartz, whose diameter is less than 5 μm, the corrosion of the surface clay by the acid-base liquid lead to the exfoliation of the crystals such as the authigenic quartz. Then, these movable particles obstruct the pore throat. The mechanism of this kind of damage which shows a upper medium to strong acid sensitivity is different from that of the other traditional damage such as the secondary precipitation. The sensitivity damage mechanism shows that all kinds of sensitivities have superposition effects.