针对油田注水开发的中后期油井含水率升高 ,甚至水淹等问题 ,研制出SD选堵剂 ,并进行了室内模拟试验和性能评价。结果表明 ,选堵剂 (SD)具有好的油溶性 ,成胶时间和软化温度可调 ,堵水率 98%以上 ,堵油率1 0 %左右 ,封堵强度可达 1 5MPa/m以上。现场应用 1 2 4井次 ,有效率 90 %以上。 Aiming at the problems of oil well water flooding and even water flooding in the middle and later stages of oilfield waterflood development, SD compound plugging agent was developed and indoor simulation test and performance evaluation were carried out. The results show that the plugging agent (SD) has good oil solubility, gel time and softening temperature can be adjusted, the water plugging rate is above 98%, the oil plugging rate is about 10%, and the plugging strength can reach above 15MPa / m. Field application 1 2 4 times, the efficiency of more than 90%.