硬葡聚糖化学封堵胶塞的制备及性能评价*

Preparation and Performance Evaluation of Chemical Wellbore Plug Based on Scleroglucan

李 亮 温 鑫 郭 娜 殷鸿尧 伍亚军 冯玉军

LI Liang WEN Xin GUO Na YIN Hongyao WU Yajun FENG Yujun

为提高基于生物聚合物的化学封堵胶塞的抗温抗盐性能，在饱和NaCl溶液中用酚醛树脂交联剂SG-3与硬 葡聚糖反应制得化学封堵胶塞。研究了交联温度、时间、交联剂浓度和硬葡聚糖浓度对胶塞力学性能的影响，分 析了影响机理，考察了胶塞在饱和NaCl溶液和120℃环境下的抗老化性能。研究结果表明，反应温度和硬葡聚 糖浓度对胶塞性能的影响较大。胶塞的力学性能随硬葡聚糖浓度的增加而增强。在80℃下，3%的硬葡聚糖和 1%的交联剂反应制得的化学封堵胶塞既具有较好的力学强度又具有较好的韧性。该化学封堵胶塞在120℃的 饱和NaCl溶液中老化40 h不发生形变，而在72 h后则几乎完全降解。由硬葡聚糖和酚醛树脂交联剂制备的化 学封堵胶塞具有良好的耐盐抗温性，并能在模拟地层水环境下逐渐降解，可用于油田固井、完井和修井等作业。 图15表3参17

In order to improve the heat resistance and salt tolerance of chemical wellbore plug based on biopolymer，plug that was prepared from phenolic resin crosslinker SG-3 and scleroglucan in saturated NaCl solution was studied. The effects of crosslinking temperature，time，concentration of both crosslinker and scleroglucan on the mechanical properties of plug and influence mechanism were investigated，and its ageing resistance in saturated NaCl solution at 120℃ was then examined. The results showed that the crosslinking temperature and scleroglucan concentration exerted great influence on plug’s performance. The mechanical performance of plug increased with the rising of scleroglucan concentration. Plug prepared from 3.0% scleroglucan and 1.0% crosslinker at 80°C showed both good toughness and mechanical property. And，its shape could keep stable for 40 h in saturated NaCl solution at 120°C. However，it nearly completely degraded after 72 h. Chemical wellbore plug prepared from scleroglucan and phenolic resin crosslinker displayed good heat resistance and salt tolerance. Moreover，it could gradually degrade in simulated formation water. Therefore，the plug might find applications in well cementation，completion and workover in oilfield.

10.19346/j.cnki.1000-4092.2020.02.009