硅酸盐学报2017，Vol.45Issue(11)：1649-1657,9.DOI:10.14062/j.issn.0454-5648.2017.11.13
聚合物基纳米SiO2复合微球固井降失水剂的合成及表征
Synthesis and Characterization of Composite Polymer Microspheres Based Nano-Silica for Cementing Fluid Loss Additive
摘要
Abstract
P(St/BA/MMA)-g-SiO2 composite microspheres (ZJD-220) were preparedviaa soap-free emulsion polymerization method with syrene (St), butyl acrylate (BA), methyl methacrylate(MMA) as monomers, sodium p-styrenesulfonate (SSS) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as ionic copolymer emulsifiers, and nano-silica as a filler. The effect of AMPS/SSS on the polymerization rate and properties of the composite microspheres was investigated. The engineering performance of fluid loss, temperature resistance and salt tolerance of cement slurry with ZJD-220 were evaluated, and the filtration reduction mechanism of ZJD-220 in cement slurry was further discussed. The results indicate that the particle size distribution of the composite polymer materials with a typical core-shell structure and good temperature resistance. The fluid loss, temperature resistance and salt tolerance of cement slurry are significantly improved by ZJD-220 when the temperature is 200℃ and the mass fraction of ZJD-220 is 3%, and the fluid loss of the fresh water and salt based cement slurry (18%NaCl) is 43 mL and 28 mL respectively. Based on the results by chemical analysis and transmission electron microscopy, the mechanism of fluid loss reduction of ZJD-220 was revealed. Polymer microspheres (ZJD-220) in cement particles and filter cake pore can improve the quality and the permeability of filter cake and the fluid loss amount of cement slurry through the synergistic reaction of 'bridging adsorption-filled and blocked-gathered film'.关键词
固井/降失水剂/纳米二氧化硅/抗温抗盐/复合聚合物微球Key words
cementation/fluid loss additives/nano-silica/temperature-salt resistance/composite polymer microspheres分类
化学工程引用本文复制引用
张健,彭志刚,邹长军,陈大钧,张博建,焦利宾..聚合物基纳米SiO2复合微球固井降失水剂的合成及表征[J].硅酸盐学报,2017,45(11):1649-1657,9.基金项目
国家 863 项目"海上大位移井固井关键技术研究"(2012AA091501-003)资助. （2012AA091501-003）
