固井用热固性树脂–镁氧水泥复合材料研究

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英文篇名：Study of a Thermosetting Resin-Magnesia Cement Composite for Cementing 作者：陈雷 ; 周仕明 ; 赵艳 ; 高元 ; 谭春勤 ; 徐春虎 英文作者：CHEN Lei;ZHOU Shiming;ZHAO Yan;GAO Yuan;TAN Chunqin;XU Chunhu;Sinopec Research Institute of Petroleum Engineering; 关键词：固井 ; 热固性树脂 ; 镁氧水泥 ; 复合材料 ; 密封完整性 英文关键词：cementing;;thermosetting resin;;magnesia cement;;composite material;;sealing integrity 中文刊名：SYZT 英文刊名：Petroleum Drilling Techniques 机构：中国石化石油工程技术研究院; 出版日期：2019-03-01 08:33 出版单位：石油钻探技术 年：2019 期：v.47;No.224 基金：国家科技重大专项“高压低渗气井水平井固井技术研究”(编号:2016ZX05021005)及“涪陵页岩气开发示范工程”(编号:2016ZX05060)联合资助 语种：中文; 页：SYZT201902012 页数：7 CN：02 ISSN：11-1763/TE 分类号：78-84

摘要

常规油井水泥石脆性大、体积收缩幅度大,使水泥环胶结质量不高且在规模化压裂及生产时易破坏,从而导致油气井环空带压,为此优选了热固性树脂、镁氧水泥骨架材料和固化剂,研制了调凝剂,制备了热固性树脂–镁氧水泥复合材料。室内试验表明,该复合材料密度1.1～1.8 g/cm~3,24 h抗压强度大于14.0 MPa,弹性模量2～4 GPa,能够承受70 MPa应力疲劳破坏,具有比油井水泥更好的抗破坏密封能力。现场试验结果表明,热固性树脂–镁氧水泥复合材料现场混配方便,与常规油井水泥固井设备和工艺完全兼容,具有良好的现场适用性和封固效果。研究认为,该复合材料不仅解决了油井水泥存在的问题,还可在油气层封堵、带压井治理及油气废弃井封井等方面替代油井水泥,为油气井的密封完整性提供技术保障。
        Due to the fact that a set cement is characterized by high brittleness and large volume shrinkage after cementing, and also that the cement sheath is easily damaged during large-scale fracturing and production process, resulting in poor bonding quality and causing sustained casing pressure(SCP), etc., research on the composite material, i.e. thermosetting resin-magnesia cement was conducted. The thermosetting resin, magnesia cement skeleton material and curing agent were optimized, and a team developed coagulator and composite material of thermosetting resin and magnesia cement. An indoor test showed that the composite material had the density of 1.1–1.8 g/cm~3, compressive strength of more than 14.0 MPa after 24 hours, and elastic modulus of 2–4 GPa, which can withstand stress fatigue damage of 70 MPa, and present better sealing and damage resistance than oil well cement. The field test results indicated that the composite material of thermosetting resinmagnesia cement was convenient for mixing at well site. Further, is was fully compatible with conventional well cementing equipment and process. It has with good field applicability and sealing effect. The research suggested that the composite material could completely solve the problems of oil well cement, even substitute the well cement for sealing the oil and gas layer, combined with SCP wells treatment and oil and gas wells abandonment, etc., so as to ensure the sealing integrity of oil and gas wells.

引文

[1]钟启刚,李杨,卢东红.提高水泥环韧性的实验研究[J].地震工程与工程震动,1997,17(4):123-129.ZHONG Qigang,LI Yang,LU Donghong.Study on improving toughness of cement sheath[J].Earthquake Engineering and Engineering Vibration,1997,17(4):123-129.
    [2]李早元,郭小阳,罗发强,等.油井水泥环降脆增韧作用机理研究[J].石油学报,2008,29(3):438-441.LI Zaoyuan,GUO Xiaoyang,LUO Faqiang,et al.Research on mechanism of increasing flexibility and decreasing brittleness of cement sheath in oil well[J].Acta Petrolei Sinica,2008,29(3):438-441.
    [3]路保平,丁士东.中国石化页岩气工程技术新进展与发展展望[J].石油钻探技术,2018,46(1):1-9.LU Baoping,DING Shidong.New progress and development prospect in shale gas engineering technologies of Sinopec[J].Petroleum Drilling Techniques,2018,46(1):1-9.
    [4]沈凡,黄绍龙,孙政,等.水性环氧树脂-水泥-乳化沥青复合胶结体系的硬化机理[J].中南大学学报(自然科学版),2012,43(1):105-110.SHEN Fan,HUANG Shaolong,SUN Zheng,et al.Hardening mechanism of waterborne epoxy-cement-emulsified asphalt bonding system[J].Journal of Central South University(Science and Technology),2012,43(1):105-110.
    [5]罗霄,姚晓,张亮,等.水乳树脂改善油井水泥石力学性能研究[J].石油天然气学报,2010,32(3):285-289.LUO Xiao,YAO Xiao,ZHANG Liang,et al.Mechanical properties of waterborne epoxy resin modified cement[J].Journal of Oil and Gas Technology,2010,32(3):285-289.
    [6]瞿佳,严思明,许建华.胶乳防腐水泥浆在元坝地区的应用[J].石油钻探技术,2013,41(3):94-98.QU Jia,YAN Siming,XU Jianhua.Application of corrosion resistant latex cement slurry in Yuanba Area[J].Petroleum Drilling Techniques,2013,41(3):94-98.
    [7]王涛,许仲梓.环氧水泥砂浆的改性机理[J].南京化工大学学报,1997,19(2):26-32.WANG Tao,XU Zhongzi.The mechnism of epoxy modification on cement mortar[J].Journal of Nanjing University of Chemical Technology,1997,19(2):26-32.
    [8]陈平,刘胜平,王德中.环氧树脂及其应用[M].北京:化学工业出版社,2014:31-42.CHEN Ping,LIU Shengping,WANG Dezhong.Epoxy resin and its application[M].Beijing:Chemical Industry Press,2014:31-42.
    [9]陶谦,陈星星.四川盆地页岩气水平井B环空带压原因分析与对策[J].石油钻采工艺,2017,39(5):588-593.TAO Qian,CHEN Xingxing.Causal analysis and countermeasures on B sustained casing pressure of shale-gas horizontal wells in the Sichuan Basin[J].Oil Drilling&Production Technology,2017,39(5):588-593.