固井防窜用智能膨胀材料基本性能研究  

Basic performance research of intelligent expansion materials to prevent channeling

作　　者：杨春丽[1] 姚晓[1] 卢振义[2] 冯水山[2] 华苏东[1] 诸华军[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009 [2]大庆钻探工程公司钻井生产技术服务二公司,松原138000

出　　处：《化工新型材料》2011年第9期127-130,共4页New Chemical Materials

基　　金：江苏省企业博士创新基金(BK2009666)

摘　　要：制备了智能膨胀材料RT-1和RT-2,对比了其与高吸油性树脂(GS)和吸油性橡胶(GX)的吸油率、吸油速率以及体积膨胀倍数,并对其热稳定性以及相应的水泥浆工程性能进行了研究。结果表明:智能膨胀材料RT-2的综合性能较好,对煤油的饱和吸油率为10.8g/g、吸油速率为1.1g/(g.h)、体积膨胀倍数为11.4、热分解温度为368℃。当RT-2掺量达到10%(BWOC),降滤失剂(KW-4)掺量为2%,减阻剂(USZ)掺量为2‰时,水泥石在80℃油浴中养护1d时的体积膨胀率为2.5%,抗压强度为11.3MPa,在80℃×7MPa下30min的失水量为34mL,在80℃×21MPa下的稠化时间为94min,满足封闭油气窜流通道、提高水泥环胶结质量的基本性能要求。The annular migration of oil and gas wells,one of the major problems during cementing operations,has significant impact on the cementing quality.Oil and gas trigging intelligent expansion slurry is a self-healing slurry system proposed for sealing the micro-annuals of cement sheath after cementing.Two intelligent expansion materials RT-1 and RT-2 were prepared and comparatively investigated with high oil-absorbing resin（GS） and oil-absorbing rubber（GX） on the properties of oil absorption ratio,oil absorption rate and volume expansion ratio.The thermal stability of RT-2 and the engineering properties of intelligent expansion slurry system were studied.Results showed that intelligent expansion materials RT-2 had oil absorption ratio of 10.8g/g,oil absorption rate of 1.1g/（g·h） and expansion ratio of 11.4.Its thermal decomposition temperature was 368℃.The slurry containing 10%（BWOC） RT-2,2% loss additive,and 2‰ drag-reducing additive generated a cement stone with 1d volume expansion of 2.5% in 80℃ oil bath,compressive strength of 11.3MPa,water loss of 30min of 34ml under 80℃×7MPa condition and thickener time of 94min under 80℃×21MPa condition.Above properties meet the requirements of sealing channeling oil and gas circulation way and Improving the quality of cement ring.

关 键 词：固井 环空窜流 油井水泥 智能膨胀材料 

分 类 号：TE256[石油与天然气工程—油气井工程]