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介绍了一种钻井堵漏用凝胶的配制方法,对形成凝胶的交联剂配方组成、聚丙烯酰胺胶液浓度等进行了筛选实验,筛选出一种适合堵漏应用的交联剂JL-2,确定聚丙烯酰胺最佳浓度为0.8%。对影响凝胶形成的温度、交联剂浓度、聚丙烯酰胺类型等进行了研究,得出了适宜90～120℃地层温度下应用的最佳堵漏凝胶配方。在室内对堵漏凝胶进行了封堵效果及承压强度试验,承压强度可达8MPa,对高渗透填砂管封堵率可达99.7%以上,对5mm裂缝二次封堵成功率100%,为现场应用提供了指导数据。
A preparation method of drilling plugging gel was introduced. The composition of the gel forming crosslinker, the concentration of polyacrylamide glue and so on were screened out, and a suitable crosslinking agent JL -2, the optimum concentration of polyacrylamide is 0.8%. The influence of gel formation temperature, crosslinker concentration, polyacrylamide type and so on were studied, and the best plugging gel formulation suitable for 90 ~ 120 ℃ formation temperature was obtained. In the indoor plugging gel plugging effect and pressure strength test, the bearing strength up to 8MPa, high permeable filler pipe plugging rate of up to 99.7%, 5mm cracks secondary plugging success rate of 100 %, Provide guidance data for field application.