油井水泥自愈合剂的改性研究

摘要

The oil well cement self healing technology to improve the cementing quality,the sealing long-term sex has important significance is increased.The self-healing agent KRM-1 developed by Nanjing ChaRisma Co.,Ltd response speed,for initial microfracture recovery degree is good,but there are big loss,from the long-term effect is weak to heal the problem.Based on the suspension embedding method,micro emulsion polymerization and emulsion polymerization of fine got three kinds of modified self healing agent,and make its performance evaluation.Results show that:the use of fine emulsion polymerization method,since the healing-agent KRM-C have good compatibility,and compare to the self-healing agent KRM-1,its healing of long-term are more optimal; Cement stone compressive strength is increased by 38.1％,33.9％ lower permeability.The field test results are good.%油井水泥自愈合技术对于提高固井质量,增加封固长效性有重要意义.南京科瑞玛科技有限公司的油井水泥自愈合剂KRM-1响应速度快,对于初期的微裂缝恢复程度较好,但存在损耗大、自愈合长期效果较弱的问题.采用悬浮包埋法、微乳液聚合法和细乳液聚合法制得了三种改性自愈合剂,并对其性能进行评价.实验表明:使用细乳液聚合法制得的自愈合剂KRM-C的配伍性良好,与自愈合剂KRM-1相比,其自愈合长效性更优；水泥石抗压强度提高38.1％,渗透率降低33.9％.现场试验情况良好.