一种高温纳米复合水泥配方的研制及性能评价  

Development and Performance Evaluation of a High Temperature Nanocomposite Cement Formulation

作　　者：王胜[1] 何鑫 李玉杰 陈绍华 陈礼仪[1] 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)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [2]钟山区自然资源局,贵州六盘水553001

出　　处：《材料导报》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)。

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℃.

关 键 词：固井水泥 纳米氧化铝 强度衰退 地热开采 

分 类 号：TE256[石油与天然气工程—油气井工程]