摘要
为解决地热固井过程中水泥的强度衰退问题,通过实验和微观分析,研制了一种适用于地热开采的高温纳米复合水泥。在G级高抗油井水泥的基础上,通过添加硅微粉、纳米氧化铝、减水剂(JSS)和早强剂(SN+SC)配制了高温纳米复合水泥(NAAC),测试了其各项性能,并采用X射线衍射(XRD)和环境扫描电镜(ESEM)分析了NAAC的微观特征。结果表明,NAAC在150℃下的可泵期为70 min,泌水率为0.1%,28 d抗压强度达39.7 MPa,3 d抗折强度达8.37 MPa,能够满足150℃高温下的地热固井需求。
In order to solve the problem of strength decline of cementing cement in the process of geothermal exploitation,a high temperature nano-composite cement for geothermal exploitation was developed by experiments and microscopic analysis.On the basis of grade G oil well cement,high-temperature nano-composite cement(NAAC)was prepared by adding silicapowder,nano-alumina,water reducer(JSS)and early strength agent(SN+SC),and its properties were tested.The micro-characteristics of NAAC were analyzed by X-ray diffraction(XRD)and environmental scanning electron microscopy(ESEM).The results show that the pumpable period of NAAC at 150℃was 70 min,that the bleeding rate was 0.1%,that the 28 d compressive strength was 39.7 MPa,and the 3 d flexural strength was 8.37 MPa,which could meet the requirements of geothermal cementing at 150℃.
作者
王胜
何鑫
李玉杰
陈绍华
陈礼仪
WANG Sheng;HE Xin;LI Yujie;CHEN Shaohua;CHEN Liyi(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Natural Resources Bureau of Zhongshan District,Liupanshui 553001,Guizhou,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第S02期154-158,共5页
Materials Reports
基金
地质灾害防治与地质环境保护国家重点实验室项目(SKLGP2019Z006)。
关键词
固井水泥
纳米氧化铝
强度衰退
地热开采
cementing cement
nano-alumina
strength decline
geothermal exploitation
