以塔里木吉拉克三叠系砂岩储层为对象,研究了粘土矿物对油层的损害。结果表明,该储层中的粘土矿物对外界流体的矿化度很敏感,矿化度高于或低于地层水的外界流体都会使粘土矿物发生膨胀、分散或脱水破裂脱落,造成油层损害。对5种国产阳离子聚合物粘土稳定剂的性能进行了评价,筛选出了适用于吉拉克地区保护油层的粘土稳定剂——BCS-851。 Taking Triassic sandstone reservoirs of Tarim Jilak as an example, the damage of clay minerals to oil reservoirs was studied. The results show that the clay minerals in the reservoir are sensitive to the salinity of the fluid, and the external fluids with salinities higher or lower than that of the formation water will cause the clay minerals to expand, disperse or dehydrate, resulting in oil layer damage. The properties of five domestic cationic polymer clay stabilizers were evaluated and the clay stabilizer - BCS-851, which is suitable for reservoir protection in Jilak region was screened out.