钻井液用MOF衍生物封堵-抑制剂的制备与性能

Preparation and Performance of MOF-derived Plugging and Inhibiting Agent Used in Drilling Fluids

庄庆佐 田玉芹 罗 跃 罗 霄 辛爱渊 唐延彦 刘伟伟

ZHUANG Qingzuo TIAN Yuqin LUO Yue LUO Xiao XIN Aiyuan TANG Yanyan LIU Weiwei

以六水合硝酸锌、2-甲基咪唑（GC）和乙二胺（EDA）为原料，通过原位功能化法制得MOF-乙二胺有机-无机杂化材料，继而与氮丙啶进行一锅法加聚反应，制得了结构外侧富含胺基官能团的纳米级MOF衍生物封堵-抑制剂。研究了该剂的封堵性能、抑制性能及与不同钻井液体系的配伍性。MOF衍生物封堵-抑制剂具有优异的封堵性能，可大幅降低基浆滤失量。6%的钠膨润土基浆在30 min时的总滤失量高达24mL，而由3%钠土+3%封 堵-抑制剂构成的土浆在30 min时的总滤失量仅4.4 mL，远低于基浆的。25%的膨润土在2%的封堵-抑制剂悬浊液中的动切力仅6.5 Pa，膨润土在2%封堵-抑制剂悬浊液中的最终膨胀高度较之在去离子水中降低了76%，泥页岩在2%封堵-抑制剂悬浊液中的滚动回收率达74.23%。以3%封堵-抑制剂取代3种钻井液体系原有的封堵剂与有机抑制剂后，钻井液老化前后的流变性能与API滤失量均维持了稳定，仅HTHP滤失量小幅上升，泥页岩在取代后钻井液中的滚动回收率略有上升。MOF衍生物封堵-抑制剂兼有良好的封堵性能、抑制性能与配伍性。

The MOF-derived plugging and inhibiting agent，rich in amine groups in outside structure，was successfully prepared，employing addition polymerization of the aziridine and the functional organic-inorganic hybrid which was prepared by zinc nitrate hexahydrate，2-methylimidazole and ethylenediamine，and it’s sealing ability，inhibition and compatibility with various drilling fluids were investigated. The agent could greatly reduce the total filtration loss of base slurry due to its excellent plugging performance. The total filtration loss of the 6% bentonite muds was 24 mL，while that of the 3% bentonite +3% agent slurry was only 4.4 mL. The yield point of the slurry system containing 2% agent was only 6.5 Pa as the bentonite reached up to 25%，and the swelling heights of the bentonite in the 2% agent system reduced by 76% compared with in fresh water system. Furtherly，the recovery rate of shale treated by the agent was satisfactory，being of 74.23%. In addition，the 3% plugging and inhibiting agent ensured the rheological property and filtration steady for drilling before and after aging and showed a slight increases in HTHP filtration as well as shale recovery rate. Based on results，the MOF-derived plugging and inhibiting agent has excellent sealing ability，inhibition and compatibility.