减阻水压裂液用黏土稳定剂的合成与应用

针对现有减阻水压裂液用黏土稳定剂配伍性差、用量大、防膨率低、固体形态不便于现场配液等问题，研制了一种阳离子型液体黏土稳定剂SRCS-1。SRCS-1的分子链上分布阳离子基团，又含有小分子阳离子化合物，2者协同作用达到稳定黏土的效果。其分子量较低，既能保证所含的阳离子基团能够提供较高的防膨率，又能避免过长的分子链和过多的阳离子与阴离子聚合物减阻剂发生相互作用而产生沉淀或絮凝，与减阻水中阴离子聚合物减阻剂配伍性良好，加量0.3%条件下防膨率达到68.2%，优于收集到的现场应用过的同类产品。通过表面张力、ζ电位、粒度测试分析了该黏土稳定剂的防膨机理。SRCS-1在新疆孔探1井进行减阻水压裂液进行了现场应用，配液方便、快捷，表现出优良的配伍性和防膨性，减阻水性能稳定，施工顺利。 

Synthesis and Evaluation of Clay Stabilizer Used in Slick Water Fracturing Fluid

The clay stabilizer used in slick water fracturing fluids has the following problems such as poor compatibility, high consumption, poor inhibition to clay swelling and difficulty in solution making in field operations. A new cationic clay stabilizer, SRCS-1, has been developed to try to solve the aforesaid problems. SRCS-1 has good compatibility with the anionic polymer drag reducers used in slick water. The percentage of clay cores swelling tested with 0.3%SRCS-1 is 68.2%, better than those clay stabilizers collected from operation fields. The swelling inhibition mechanism was analyzed by measuring the surface tension, ζ potential and particle size distribution. SRCS-1 has been used in the slick water fracturing in the well Kongshen-1 in Xinjiang, and the water solution was prepared very easily and fast. The SRCS-1 had good compatibility with other additives used, and good inhibitive capacity. The slick water made had stable properties and the fracturing jobs were successful.