强敏感性低渗透储层的改造模拟实验初探

准噶尔盆地北三台地区白垩系储层中低渗透储层占73.11%，储层中粘土矿物以蒙脱石及无序伊/蒙混层矿物为主，高岭石、绿泥石和伊利石整体含量较低，但局部富集。室内敏感性实验分析表明：研究区低渗透储层具有敏感性复杂、多种敏感性共存的特征，敏感性尤以水敏最强，是造成主力油层低产、无产的直接原因。酸敏实验表明：常规土酸酸化不能有效改善研究区的储层物性，也不能有效降低储层水敏性。针对研究区储层具体特征，筛选配制了配方为8% 盐酸+2% 醋酸+2% 氟化铵+1.5% 粘土稳定剂A+2% 铁离子稳定剂TLJ 的复合解堵液。模拟地层温度、压力条件，进行了水敏样品的解堵改造实验和原样提高渗透率实验，结果表明：对于蒙脱石及伊/蒙混层矿物相对含量高、绿泥石相对含量低的储层，该复合解堵液具有较好的解堵效果和物性改良作用。

The Essence,Characteristics and Promulgation of the Spirit of the Old Revolutionary Area in Sichuan

The deeply rooted spirit of the old revolutionary area in Sichuan was formed in the the new democratic revolution period. It focuses on Chinese people＇ s struggle for national independence and liberation in the twentieth century. Combined with the long history and culture of Sichuan, the spirit is of practical, national and theoretical na-ture and presents the spiritual and cultural characteristics as ＂to be brave and wise, to pursue truth and stay prag- matic, and to struggle with a united spirit to the end＂. When promulgating Sichuan revolutionary spirit, we should improve the regional cultural soft power at the same time. On the other hand, the revolutionary spirit should be en- dowed with new connotation so that we can keep on explaining the new topics of the new era.