A Geopolymer Based Oil and Gas Well Cementing Material
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摘要: 地聚物是一类由碱激发剂和胶凝材料制备而成的、由SiO4和AlO4四面体单元组成的具有三维立体网状结构的无机聚合物材料。该类材料具有力学性能优异、与无机基材黏结强度高和流动性良好等特点。针对油气井中残余的泥饼导致水泥浆无法有效黏结“固井二界面”的问题，通过添加偏高岭土MK与油井钻井液中的黏土同构地聚物达成油井固泥效果。通过水玻璃和偏高岭土制备了低黏度、高渗透率的地聚物基固泥材料。该地聚物基固泥材料的玻璃模数为1.5，MK添加量为2.5%，其在常压和高压环境下均能渗入泥饼；经90 ℃固化10 h后泥饼的抗压强度分别为3.0 MPa和1.0 MPa；同时，固化后的泥饼能提高固井二界面的胶结性能，“地层-水泥”界面和“套管-水泥”界面的胶结强度分别为0.6和1.0 MPa。X射线衍射分析结果表明，MK的加入虽然无法改变最终固化后泥饼的结晶性能，但适量加入MK能提高胶凝材料的含量，从而进一步提高固化后泥饼的抗压强度和胶结强度。Abstract: Geopolymer is a kind of inorganic polymer made from alkali activator and gel material. It has a 3D network structure formed by SiO4 and AlO4 tetrahedra. Geopolymer has excellent mechanical performance, high bonding strength with inorganic substrate and good mobility. In oil and gas well cementing, the mud cakes remained on the borehole wall cause poor cementation of the cement sheath with the borehole wall. To solve this problem, metakaolin (MK) was added to form a geopolymer with the clays in the drilling fluid to improve the quality of well cementing operation. Using water glass and MK (at a concentration of 2.5%), a geopolymer based well cementing material with low viscosity and high porosity was developed. The glass modulus (M) of the geopolymer was 1.5, and it can effectively penetrate mud cakes at both normal and high pressures. After being solidified at 90 ℃ for 10 hours, the compressive strengths of the mud cake were 3.0 MPa and 1.0 MPa, respectively. Meanwhile, the solidified mud cakes can enhance the bonding strength of the cement sheath with the borehole wall, the bonding strengths of the “borehole wall – cement sheath” interface and the “casing – cement sheath” interface were 0.6 MPa and 1.0 MPa, respectively. XRD analysis revealed that although the addition of MK cannot change the crystallization property of the mud cakes after final solidification, it to some extent increases the concentrations of the gel materials in the mud cakes, which further increases the compressive strength and bonding strength of the solidified mud cakes.
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Key words:
- Geopolymer /
- Solidification of mud cake /
- Metakaolin /
- Well cementing
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表 1 泥饼成分分析结果
成分 含量/% 成分 含量/% BaO 59.18 Fe2O3 0.52 SO3 36.32 CaO 0.49 SiO2 2.41 Al2O3 0.46 SrO 0.58 *LOI 3.01 注：*LOI为烧失量 
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[1] CHAAUDHURY M K. Complex fluids: Spread the world about nanofluids[J]. Nature, 2003, 423(10):131-132. [2] ABDO J, HANEEF D M. Nano-enhanced drilling fluids: Pioneering approach to overcome uncompromising drilling problems[J]. Journal of Energy Resources Technology, 2012, 13(4):1-6. [3] 蔚宝华,卢晓峰,王炳印,等. 高温井地层温度变化对井壁稳定性影响规律研究[J]. 钻井液与完井液,2004,21(6):15-18. doi: 10.3969/j.issn.1001-5620.2004.06.005WEI Baohua, LU Xiaofeng, WANG Bingyin, et al. Law of temperature influence on weilbore stability in hot well[J]. Drilling Fluid & Completion Fluid, 2004, 21(6):15-18. doi: 10.3969/j.issn.1001-5620.2004.06.005 [4] 刘立新,杜俊涛,刘顺平,等. 耐高温钻井液降黏剂St/AMPS/AA的研制[J]. 钻井液与完井液,2012,29(2):18-20.LIU Lixin, DU Juntao, LIU Shunping, et al. Research on high temperature drilling fluid thinner St/AMPS/AA[J]. Drilling Fluid & Completion Fluid, 2012, 29(2):18-20. [5] 董兵强,邱正松,陆朝晖,等. 临兴区块致密砂岩气储层损害机理及钻井液优化[J]. 钻井液与完井液,2018,35(6):65-70. doi: 10.3969/j.issn.1001-5620.2018.06.012DONG Bingqiang, QIU Zhengsong, LU Chaohui, et al. Damage mechanisms determination for tight sands gas reservoir in block Linxing and drill-in fluid optimization for protection of the reservoir[J]. Drilling Fluid & Completion Fluid, 2018, 35(6):65-70. doi: 10.3969/j.issn.1001-5620.2018.06.012 [6] 熊勇, 熊朝柱. 用于复杂井况下快速起钻的钻杆刮泥器及其刮泥方法: 中国, CN111441746A[P]. 2013-01-09.XIONG Yong, XIONG Chaozhu. Drill pipe mud scraper and mud scraping method for quick tripping under complex well conditions: China, CN111441746A[P], 2013-01-09. [7] 杨振杰,叶海超,龚保强,等. 固井液与多功能钻井液泥饼整体固化胶结的可行性探讨[J]. 钻井液与完井液,2002,19(5):1-7. doi: 10.3969/j.issn.1001-5620.2002.05.001YANG Zhenjie, YE Haichao, GONG Baoqiang, et al. Feasibility of integrated solidification and cementation of cementing fluid with mud cake from multifunctional drilling fluid[J]. Drilling Fluid & Completion Fluid, 2002, 19(5):1-7. doi: 10.3969/j.issn.1001-5620.2002.05.001 [8] 梅雨堃,李明,刘璐,等. 提高二界面胶结质量的矿渣钻井液滤饼可固化技术[J]. 钻井液与完井液,2016,33(1):68-32.MEI Yukun, LI Ming, LIU Lu, et al. Solidification of slag mud cake that improves cementation quality of the second bonding interface[J]. Drilling Fluid & Completion Fluid, 2016, 33(1):68-32. [9] 杜建平,顾军,张辉,等. 有效提高页岩气井固井质量的泥饼固化防窜固井技术[J]. 天然气工业,2015,35(9):89-94. doi: 10.3787/j.issn.1000-0976.2015.09.013DU Jianping, GU Jun, ZHANG Hui, et al. Mud cake solidification technology for improving cementing quality of shale gas wells[J]. Natural Gas Industry, 2015, 35(9):89-94. doi: 10.3787/j.issn.1000-0976.2015.09.013 [10] GU J, GAN P, DONG L, et al. Prediction of water channeling along cement-aquifuge interface in CBM well: Model development and experimental verification[J]. Journal of Petroleum Science and Engineering, 2018, 17(173):55-60. [11] GU J, HUANG J, HAO H. Influence of mud cake solidification agents on thickening time of oil well cement and its solution[J]. Construction and Building Materials, 2017, 153(30):327-336. [12] DUXSON P, PROVIS J L, LUKEY G C, et al. Geopolymer technology: the current state of the art[J]. Journal of Materials Science, 2007, 42(9):2917-2933. doi: 10.1007/s10853-006-0637-z [13] 胡志超,张长森,顾薛苏,等. 苯丙乳液/偏高岭土基地聚合物的制备与耐高温性能[J]. 混凝土,2020,373(11):67-71. doi: 10.3969/j.issn.1002-3550.2020.11.015HU Zhichao, ZHANG Changsen, GU Xuesu, et al. Preparation and high temperature resistance of styrene-acrylate emulsion/metakaolin-based geopolymers[J]. Concrete, 2020, 373(11):67-71. doi: 10.3969/j.issn.1002-3550.2020.11.015 -
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