Penetrating Consolidating Epoxy-Based Oil and Gas Well Cementing Additives for Use at Ambient Temperature
-
摘要: 在油气井钻井过程中固井二界面胶结强度低是导致固井环气窜问题的重要原因。采用含可反应稀释剂的低黏度、高渗透性的环氧树脂（HP环氧树脂）与水泥浆共混，混合水泥浆中的环氧树脂在高压下可以渗透扩散至泥饼中，经固化后可明显改善水泥浆和泥饼之间的界面胶结强度。实验结果表明，HP环氧树脂自身固化具有较高的抗压性能，加入表面活性剂Tween-80可提高其与水泥浆的相容性，形成均一的体系，HP环氧改性水泥浆的各项性能指标符合工程需求。通过接触角、SEM等测试验证了环氧树脂通过“渗入-扩散-胶结”来增强界面黏接力的机理。结果表明， HP环氧树脂占比为5%的共混水泥浆，其1 d的抗压强度为24.3 MPa，用其进行泥饼胶结时，固化1 mm厚泥饼的胶结强度可达0.45 MPa，如果将HP环氧树脂的含量升至10%，胶结强度还能进一步提升至0.55 MPa。从微观形貌中可以看出，HP环氧树脂从水泥浆中渗透扩散至泥饼中，使得形成的泥饼界面更加致密，从而提高改性水泥浆-泥饼界面的胶结强度。Abstract: In oil and gas well drilling, the low bond strength between the cement sheath and the borehole wall (mud cakes) is an important factor causing gas channeling along the interfaces between the cement sheath and the borehole wall. In laboratory experiment, a low viscosity high penetrating capacity epoxy resin (HP epoxy resin) containing reactive thinner was mixed with a cement slurry. The epoxy resin in the mixed cement slurry can penetrate and diffuse into the mud cakes under high pressures. The epoxy resin, after becoming consolidated, greatly improved the bond strength between the cement sheath and the mud cakes. The experimental results have shown that the consolidated epoxy resin have high compressive strength and can be uniformly mixed with cement slurry with the aid of Tween-80, a surfactant. The properties of the cement slurry modified with the HP epoxy resin meet the requirements of field operations. By contact angle measurement and SEM analysis, it was found that the epoxy resin improved the bond strength between the cement sheath and the borehole wall through a “penetration-diffusion-bonding” process. A cement slurry containing 5% HP epoxy resin had 1 d compressive strength of 24.3 MPa. When this cement slurry was bonded with mud cakes, the bond strength of the solidified mud cake of 1 mm in thickness can be as high as 0.45 MPa. When the content of the HP epoxy resin in the cement slurry was increased to 10%, the bond strength was raised to 0.55 MPa accordingly. From the micromorphology of the consolidated mud cakes it was found that the HP epoxy resin penetrated and diffused into the mud cakes from the cement slurry, making the surface of the mud cakes denser, hence improving the bond strength of the interfaces between the modified cement slurry and the mud cakes.
-
Key words:
- Well cementing /
- Epoxy resin /
- Bond of mud cake /
- Penetrate /
- Diffuse /
- Bond
-
表 1 30 ℃下纯水泥浆与5% HP环氧改性水泥浆稠化实验结果
水泥浆 φ3 φ6 φ30 φ60 φ100 φ200 φ300 FL/mL t稠化/min 纯水泥浆 8 13 46 78 116 198 270 13.1 346 HP环氧改性水泥浆 7 12 43 73 109 189 265 11.2 374 注：稠化实验条件为30 ℃/15 MPa/15 min 
下载: 导出CSV
-
[1] 唐炜,余建,宾国成. 深井及超深井固井技术应用简析[J]. 西部探矿工程,2021,33(6):31-33. doi: 10.3969/j.issn.1004-5716.2021.06.010TANG Wei, YU Jian, BING Guocheng. Brief analysis of the application of cementing technology in deep and ultra-deep wells[J]. West-China Exploration Engineering, 2021, 33(6):31-33. doi: 10.3969/j.issn.1004-5716.2021.06.010 [2] 蒙开坚,高扬,宋建坤. 探究石油钻井技术及固井技术的发展[J]. 中国石油和化工标准与质量,2021,41(5):167-169. doi: 10.3969/j.issn.1673-4076.2021.05.059MENG Kaijian, GAO Yang, SONG Jiankun. Explore the development of oil drilling technology and cementing technology[J]. China Petroleum and Chemical Standard and Quality, 2021, 41(5):167-169. doi: 10.3969/j.issn.1673-4076.2021.05.059 [3] 汪海阁,黄洪春,毕文欣,等. 深井超深井油气钻井技术进展与展望[J]. 天然气工业,2021,41(8):163-177. doi: 10.3787/j.issn.1000-0976.2021.08.015WANG Haige, HUANG Hongchun, BI Wenxin, et al. Deep and ultra-deep oil/gas well drilling technologies: Progress and prospect[J]. Natural Gas Industry, 2021, 41(8):163-177. doi: 10.3787/j.issn.1000-0976.2021.08.015 [4] HUGHES B. Sealant improves drilling in depleted sands[J]. Drilling Contractor, 2006, 1(3):44-48. [5] 卢海川,李宗要,高继超,等. 油气井用合成树脂胶凝材料研究综述[J]. 钻井液与完井液,2018,35(5):1-7.LU Haichuan, LI Zongyao, GAO Jichao, et al. Review of studies on synthetic resin cementitious materials used in oil and gas wells[J]. Drilling Fluid & Completion Fluid, 2018, 35(5):1-7. [6] 曹成章,步玉环,田磊聚,等. 可固化树脂基固井材料及其固化剂的优选[J]. 钻井液与完井液,2020,37(4):498-506. doi: 10.3969/j.issn.1001-5620.2020.04.016CAO Chengzhang, BU Yuhuan, TIAN Leiju, et al. Selection of curable resin based cementing material and the curing agent thereof[J]. Drilling Fluid & Completion Fluid, 2020, 37(4):498-506. doi: 10.3969/j.issn.1001-5620.2020.04.016 [7] 赫英状,易浩,李斐,等. 水溶性树脂固井工作液体系性能评价[J]. 油田化学,2021,38(4):595-602.HE Yingzhuang, YI Hao, LI Fei, et al. Performance evaluation of water-soluble resin-based cementing fluid system[J]. Oilfield Chemistry, 2021, 38(4):595-602. [8] 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. Study on the improvement of mechanical properties of oil well cement with water emulsion resin[J]. Journal of Oil and Gas Technology, 2010, 32(3):285-289. [9] 陈雷. 硫氧镁树脂网络互穿胶凝体系研究及封井应用[J]. 钻井液与完井液,2018,35(6):87-92. doi: 10.3969/j.issn.1001-5620.2018.06.016CHEN Lei. Study on magnesium oxysulfate resin IPN cementing material and its application in well plugging[J]. Drilling Fluid & Completion Fluid, 2018, 35(6):87-92. doi: 10.3969/j.issn.1001-5620.2018.06.016 [10] 陈雷,周仕明,赵艳,等. 固井用热固性树脂–镁氧水泥复合材料研究[J]. 石油钻探技术,2019,47(2):74-80.CHEN Lei, ZHOU Shiming, ZHAO Yan, et al. Study of a thermosetting resin-magnesia cement composite for cementing[J]. Petroleum Drilling Techniques, 2019, 47(2):74-80. [11] 于永金, 李明, 靳建洲, 等. 一种热固性环氧树脂固井工作液[P]. CN108865087A 2018.YU Yongjin, LI Ming, JIN Jianzhou, et al. A thermosetting epoxy resin cementing fluid[P]. CN108865087A 2018. [12] 阎培渝,岳蕾,代丹,等. 环氧树脂乳液对油井水泥石水化过程和力学性能的影响[J]. 硅酸盐通报,2016,35(7):2019-2023.YAN Peiyu, YUE Lei, DAI Dan, et al. Effect of epoxy resin on the hydration and mechanical property of oil well cement stone[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(7):2019-2023. [13] 阎培渝,岳蕾,代丹,等. 无固化剂环氧树脂乳液对油井水泥早期水化的影响[J]. 硅酸盐学报,2017,45(5):608-613.YAN Peiyu, YUE Lei, DAI Dan, et al. Influence of epoxy resin emulsion without curing agent on hydration of oil well cement in early age[J]. Bulletin of the Chinese Ceramic Society, 2017, 45(5):608-613. [14] 王照辉,崔凯潇,蒋官澄,等. 基于形状记忆环氧树脂聚合物的温敏可膨胀型堵漏剂研制及性能评价[J]. 钻井液与完井液,2020,37(4):412-420.WANG Zhaohui, CUI Kaixiao, JIANG Guancheng,et al. Development and evaluation of a temperature-sensitive expandable lost circulation material made from a shape memory epoxy polymer[J]. Drilling Fluid & Completion Fluid, 2020, 37(4):412-420. [15] 陈宗瑞. 环氧树脂改性水泥修补砂浆的性能研究[D]. 武汉: 武汉理工大学, 2019.CHEN Zongrui. Study on performance of cement repair mortar modified by epoxy resin[D]. Wuhan: Wuhan university of technology, 2019. [16] 符军放,赵琥,项先忠. 一种固井合成水泥石的研制与室内评价[J]. 钻井液与完井液,2015,32(2):61-63. doi: 10.3969/j.issn.1001-5620.2015.02.016FU Junfang, ZHAO Hu, XIANG Xianzhong. Development and evaluation of a compound set cement for well cementing[J]. Drilling Fluid & Completion Fluid, 2015, 32(2):61-63. doi: 10.3969/j.issn.1001-5620.2015.02.016 [17] 张国梁,马春风,张广照. 渗入固结型混凝土防腐涂料的研究[J]. 涂料工业,2018,48(1):1-5. doi: 10.12020/j.issn.0253-4312.2018.1.1ZHANG Guoliang, MA Chunfeng, ZHANG Guangzhao. Study on permeable coating for anticorrosion of concrete[J]. Paint & Coatings Industry, 2018, 48(1):1-5. doi: 10.12020/j.issn.0253-4312.2018.1.1 [18] 刘昱亮,李早元,薛元陶,等. 固井水性环氧树脂水泥石力学性能研究[J]. 硅酸盐通报,2019,38(2):339-343.LIU Yuliang, LI Zaoyuan, XUE Yuantao, et al. Study on mechanical properties of cementing waterborne epoxy cement[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(2):339-343. [19] 付洪琼,郭小阳,瞿雄,等. 一种添加环氧树脂乳液的优质固井水泥浆[J]. 天然气工业,2021,41(11):115-121. doi: 10.3787/j.issn.1000-0976.2021.11.012FU Hongqiong, GUO Xiaoyang, QU Xiong, et al. High-quality cementing slurry with epoxy resin emulsion[J]. Natural Gas Industry, 2021, 41(11):115-121. doi: 10.3787/j.issn.1000-0976.2021.11.012 -
点击查看大图
图(8) / 表(1)
计量
- 文章访问数: 888
- HTML全文浏览量: 305
- PDF下载量: 85
- 被引次数: 0
