以辽河高升油田莲花油层 ,通过室内模拟实验和矿场岩心分析了蒸汽驱对储层孔隙结构和矿物组成的影响。研究表明蒸汽驱导致储层孔隙度、孔隙直径增大 ,喉道半径、渗透率减小 ,增强了孔喉分布的非均质性 ,蒸汽对粘土矿物的微结构有强烈的破坏力。同时 ,室内实验表明蒸汽驱过程中 ,2 5 0℃时有蒙脱石、沸石等矿物产生 ,但由于稠油对蒙脱石等细小的微粒有较强的携带能力 ,最终导致储层中蒙脱石的含量降低。微粒运移和蒙脱石的膨胀为蒸汽驱过程中储层伤害的主要原因 Taking Liaohe Gaoshan Oilfield Lianhua reservoir as an example, the influence of steam flooding on the pore structure and mineral composition of the reservoir was analyzed by indoor simulation experiments and mine cores. The results show that steam flooding leads to reservoir porosity, pore diameter increase, throat radius and permeability decrease, which enhances the heterogeneity of pore-throat distribution. Steam has a strong destructive effect on the microstructure of clay minerals. At the same time, laboratory experiments show that during steam flooding, some minerals such as montmorillonite and zeolite are generated at 250 ℃. However, due to the strong carrying capacity of heavy oil on fine particles such as montmorillonite, The content of trimellitated stone is reduced. Particle migration and swelling of montmorillonite are the main causes of reservoir damage during steam flooding