钻井液用微孔喉封堵材料合成及性能研究

The Synthesis and Properties of Microporous Throat Plugging Materials for Drilling Fluid

王效坤 李丽华 杨超 孙中伟 马诚

Xiaokun Wang Lihua Li Chao Yang Zhongwei Sun Cheng Ma

辽宁石油化工大学 石油化工学院, 辽宁 抚顺 113001 中国石化大连(抚顺) 石油化工研究院, 辽宁 大连 116045 中国石化河南油田分公司工程院, 河南 南阳 473132

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Sinopec Dalian （Fushun） Research Institute of Petroleum and Petrochemical，Dalian Liaoning 116045，China Engineering Institute of Sinopec Henan Oilfield Company，Nanyang Henan 473132，China

采用乳液聚合法制备出一种微孔喉封堵材料。通过FT?IR光谱、拉曼光谱及TG?DTA热分析，对微孔喉封堵材料的结构特征进行分析。通过激光粒度仪确定合成产物的粒径范围，探究了微孔喉封堵材料的抑制性能和封堵性能。结果表明，合成产物的热分解温度为321.0 ℃，粒径分布为500~2 250 nm；当微孔喉封堵材料质量分数为1.5%时，该材料表现出极佳的抑制黏土水化性能；微孔喉封堵材料与质量分数为0.5%的氯化钠复配使用后，抑制效果显著提升。滤膜封堵实验证实其对0.45~10.00 μm孔径的滤膜进行有效封堵，微孔喉封堵材料质量分数为1.5%时封堵时间长达35.43 min；经120 ℃老化16 h后，高温高压滤失量为10.0 mL。

A micropore throat plugging material was prepared by emulsion polymerization. Its structural characteristics were analyzed by Fourier transform infrared (FT?IR) spectrum analysis, Raman spectrum analysis, and thermogravimetric?differential thermal analysis (TG?DTA). The particle size range of the synthesized product was determined by a laser particle size analyzer. The inhibition performance and plugging performance of the micropore throat plugging material were also investigated. The results show that the thermal decomposition temperature of the synthesized product is 321.0 °C and that its particle size distribution is between 500 nm and 2 250 nm. When the quantity of the micropore throat protection material used is 1.5%, it performs excellently in inhibiting clay hydration. Moreover, the inhibition effect significantly improves when the micropore throat plugging material is compounded with 0.5% sodium chloride. The filter membrane plugging experiment proves that the filter membrane with a pore diameter of 0.45~10.00 μm can be effectively plugged by the proposed material, and the plugging time is up to 35.43 min when the plugging quantity is 1.5%. After aging at 120 °C for 16 h, the high temperature and high pressure filtration loss is 10.0 mL when the amount of the micropore throat plugging material added is 1.5%.

中国石化科技部项目(219032?3)

10.3969/j.issn.1006-396X.2022.02.008