A Comb Polymer for Dispersing Micro-Manganese Weighting Material
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摘要: 为确保微锰加重剂在完井液中的分散，选用甲基丙烯酸钠和甲基烯丙基聚氧乙烯醚通过自由基聚合制备了不同组成的梳状聚合物型微锰分散剂PSH，用红外光谱、核磁共振确定了共聚物结构，探究了不同梳状聚合物微锰分散剂对钻完井液体系的降黏性及沉降稳定性的影响，提出了聚合物分散剂对微锰加重剂的分散机理。结果发现，甲基丙烯酸钠-甲基烯丙基聚氧乙烯醚共聚物对微锰加重剂的分散性能较好，分散剂PSH2、PSH3和PSH4对于微锰浆液都具有良好的降黏作用，其中PSH3样品经高温210℃老化后降黏率达到46.7%；加入PSH3后完井液体系的沉降因子从0.5290降低到0.5096。当分散剂中的甲基烯丙基聚氧乙烯醚单体含量适中时，分散剂可以达到最优的分散效果。Abstract: To ensure the dispersion of micro-manganese weighting material in a completion fluid, comb polymer dispersants PSH of different compositions were developed using sodium methacrylate and methyl allyl polyoxyethylene ether through free radical polymerization. The molecular structure of the copolymer was determined by infrared spectroscopy and nuclear magnetic resonance. The effects of the dispersants of different compositions on the rheology and settlement stability of a completion fluid were investigated. Based on these researches the mechanism with which the polymer dispersants disperse the micro-manganese weighting material was presented. It was found that the sodium methacrylate-methyl allyl polyoxyethylene ether copolymers can well disperse the micro-manganese weighting agent. The dispersants PSH2, PSH3 and PSH4 all have good thinning effect on micro-manganese slurries. Of these dispersants, the dispersant PSH3, after aging at 210℃, had viscosity reduction rate of 46.7%. When added into a completion fluid, the settlement factor of the completion fluid was reduced from 0.5290, which is the settlement factor of the blank completion fluid group, to 0.5096. If the content of the methyl allyl polyoxyethylene ether monomer in the dispersant is appropriate, the best dispersion effect can be achieved.
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表 1 PSH分散剂的合成配比、聚合物的组成分子量和分布及产率
样品 nSMA/nHPEG
（投料
组成比）nSMA/nHPEG
（聚合物
组成比）Mn/
g·mol−1Mw/
g·mol−1Mw/Mn 产率/
%PSH1 10.0 10.3 7286 18652 2.560 78.1 PSH2 15.0 14.6 7639 21450 2.808 85.6 PSH3 20.0 19.5 7810 16167 2.070 82.3 PSH4 25.0 26.2 7031 18822 2.677 82.9 PSH5 30.0 29.1 7724 19951 2.583 84.2 
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表 2 微锰浆液210℃热滚16 h前后的性能变化
样品 实验条件 降黏率/
%AV/
mPa·sPV/
mPa·sYP/
Pa空白组 热滚前 10.7 14.0 9.0 18.5 热滚后 30.0 15.0 11.0 20.5 PSH1 热滚前 12.5 10.0 17.5 热滚后 43.3 10.5 10.0 15.5 PSH2 热滚前 7.1 20.5 16.0 28.5 热滚后 46.7 8.5 8.0 12.5 PSH3 热滚前 14.3 13.0 10.0 18.0 热滚后 43.3 8.0 8.0 12.0 PSH4 热滚前 12.0 10.0 17.0 热滚后 0 8.5 8.0 12.5 PSH5 热滚前 15.5 10.0 20.5 热滚后 15.0 10.0 20.0
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表 3 微锰完井液体系的流体密度
样品名称 ρ上/（g·cm−3） ρ下/（g·cm−3） SF 空白组 1.756 1.972 0.5290 PSH1 1.760 1.889 0.5177 PSH2 1.880 2.003 0.5158 PSH3 1.986 2.064 0.5096 PSH4 1.910 2.016 0.5135 PSH5 1.306 1.561 0.5445
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[1] 张晖, 蒋绍宾, 袁学芳, 等. 微锰加重剂在钻井液中的应用[J]. 钻井液与完井液, 2018, 35(1): 1-7.ZHANG Hui, JIANG Shaobin, YUAN Xuefang, et al. Application of micro powder manganese weighting agent in drill-in fluids[J]. Drilling Fluid & Completion Fluid, 2018, 35(1): 1-7. [2] 潘谊党, 于培志, 马京缘. 高密度钻井液加重材料沉降问题研究进展[J]. 钻井液与完井液, 2019, 36(1): 1-9.PAN Yidang, YU Peizhi, MA Jingyuan. Progresses in research on settling of weighting materials in high density drilling fluids[J]. Drilling Fluid & Completion Fluid, 2019, 36(1): 1-9. [3] 刘锋报, 武星星, 徐同台, 等. 微锰加重剂减轻钻井液对油气层损害研究的新进展[J]. 钻井液与完井液, 2020, 37(6): 677-684.LIU Fengbao, WU Xingxing, XU Tongtai, et al. New progresses made in the study of minimizing damage to oil and gas reservoirs with micronized manganese ore weighting agent[J]. Drilling Fluid & Completion Fluid, 2020, 37(6): 677-684. [4] 白龙, 王骁男, 闫永生. 微锰在高密度水基钻井液中加重性能分析[J]. 内蒙古石油化工, 2019, 45(8): 34-40.BAI Long, WANG Xiaonan, YAN Yongsheng. Analysis of weighting performance of micro-manganese in high density water-based drilling fluids[J]. Inner Mongolia Petrochemical Industry, 2019, 45(8): 34-40. [5] 任亮亮, 陈晨, 李超, 等. 加重材料对抗高温高密度合成基钻井液性能的影响[J]. 钻井液与完井液, 2023, 40(5): 551-555.REN Liangliang, CHEN Chen, LI Chao, et al. Effect of weighting materials on the properties of synthetic-based drilling fluids[J]. Drilling Fluid & Completion Fluid, 2023, 40(5): 551-555. [6] 刘玉林. 微锰加重剂在高密度油基钻井液中的作用评价[J]. 化学工程师, 2018, 32(5): 52-54.LIU Yulin. Evaluation of effect of micro-manganese aggravating agent in high density oil based drilling fluid[J]. Chemical Engineer, 2018, 32(5): 52-54. [7] 潘谊党. 抗高温高密度水基钻井液体系研究[D]. 北京: 中国地质大学, 2020.PAN Yidang. Research on high temperature and high density water based drilling fluid[D]. Beijing: China University of Geosciences, 2020. [8] 陈晓非, 陈娟娟, 娄刚, 等. MA/SAS/AMPS共聚物耐高温钻井液降黏剂的研制[J]. 化工科技, 2014, 22(2): 38-41.CHEN Xiaofei, CHEN Juanjuan, LOU Gang, et al. Study on MA/SAS/AMPS copolymer high temperature thinner for drilling fluid[J]. Science & Technology in Chemical Industry, 2014, 22(2): 38-41. [9] 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. [10] KAR Y, AL MOAJIL A. M, NASR-EI-DIN H, et al. Environmentally friendly dispersants for HP/HT aqueous drilling fluids containing Mn3O4, contaminated with cement, rock salt, and clay[C]//Paper presented at the SPE Middle East Oil and Gas Show and Conference. Manama, Bahrain: SPE, 2011: SPE-141957-MS. [11] REHMAN A, MOAJIL A M, NASR-EL-DIN H A, et al. Environmentally friendly dispersants for high temperature Invert-Emulsion drilling fluids weighted by manganese tetraoxide[C]//Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, Mexico City, Mexico: SPE, 2012: SPE-153646-MS. [12] WANG A Q, QIAO M, XU J, et al. Erratum: POEGMA-b-PAA comb-like polymer dispersant for Al2 suspensions[J]. Journal of Applied Polymer Science, 2016, 133(25): 133. [13] WHITBY C P, SCALES P J, GRIESER F, et al. PAA/PEO comb polymer effects on rheological properties and interparticle forces in aqueous silica suspensions[J]. Journal of Colloid and Interface Science, 2003, 262(1): 274-281. doi: 10.1016/S0021-9797(03)00179-6 [14] GUPTA P, MUNDRA R, JHA S K. Stabilization of Al2O3 dispersed slurry by controlling pH, colloids and surfaces a: physicochemical and engineering aspects[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2024, 685: 133251. doi: 10.1016/j.colsurfa.2024.133251 [15] KIRBY G H, HARRIS D J, LI Q, et al. Poly(acrylic acid)-poly(ethylene oxide) comb polymer effects on BaTiO3 nanoparticle suspension stability[J]. Journal of the American Ceramic Society, 2004, 87(2): 181-186. doi: 10.1111/j.1551-2916.2004.00181.x -
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