The vinylpyrrolidone,maleic anhydride,2-acrylamide-2-methylpropane sulfonic acid and allyl group triethoxysilane are used to modify nano silica for copolymerization,and a high-temperature resistant nano polymer cement retarder NPDS11 is developed.The molecular structure and retarding effect of NPDS11 are studied by Fourier infrared spectroscopy,thermogravimetric analysis,high-temperature retarding test and strength test of solidified cement.Combined with the molecular structure characteristics of the copolymer,its high-temperature retarding mechanism is analyzed,and its compatibility with formation fluids is experimentally analyzed.A series of studies have shown that the developed temperature resistant nano polymer cementing cement retarder can withstand temperatures up to 190℃and has good compatibility with other chemical additives.
关键词
高温油气井/水泥浆缓凝剂/纳米共合物/耐高温
Key words
high-temperature oil and gas well/cement slurry retarder/nanocomplexes/high-temperature resistance
维普
万方数据