论文部分内容阅读
针对目前煤矿井下水力压裂钻孔封孔材料易收缩、密封效果差、成本高及封孔长度不合理等问题,研究出一种由水泥、早强减水剂、聚丙烯纤维和拌合水组成的新型水力压裂封孔材料;通过室内实验优化出收缩率和抗压强度最优时的封孔材料配比及压裂钻孔封孔参数,建立新材料承压能力与封孔长度的计算关系式,并进行现场验证.结果表明,新材料的最优配比为m(水泥)∶m(水)∶m(早强减水剂)∶m(聚丙烯纤维)=1∶0.6∶0.03∶0.005;当钻孔孔径一定时,材料承压能力与封孔长度呈线性关系,现场实验结果与封孔参数计算关系基本一致,该新材料是一种性能好、成本低廉以及操作配比简单的水力压裂封孔材料.
Aiming at the problems such as easy shrinkage, poor sealing effect, high cost and unreasonable length of sealing hole in hydraulic fracturing drilling hole in coal mine at present, a cementing, early strength water reducing agent, polypropylene fiber and mixing water , The new type of hydraulic fracturing sealing material was constructed. Through the optimization of indoor experiment, the ratio of sealing material and the sealing parameters of fracturing drilling when the shrinkage rate and compressive strength were optimized, the pressure bearing capacity and sealing length of new material The results show that the optimal ratio of new material is m (cement): m (water): m (early strength water reducer): m (polypropylene fiber) = 1: 0.6: 0.03-0.005. When the hole diameter is constant, the bearing capacity of the material has a linear relationship with the length of the sealing hole. The field experiment results are basically consistent with the calculation of the sealing parameters. The new material is a good performance, low cost and operating ratio Simple hydraulic fracturing sealing material.