Yb_2O_3对Al_2O_3基石油压裂支撑剂耐酸性能的影响  

Effect of Yb_2O_3 on Acid Resistance of Alumina-based Oil Fracturing Ceramic Proppant

作　　者：马俊良[1,2] 吴伯麟[1,2] 吴婷婷[1,2] 

机构地区：[1]有色金属及材料加工新技术教育部重点实验室,桂林541004 [2]桂林理工大学材料科学与工程学院,桂林541004

出　　处：《中国陶瓷》2016年第5期60-63,共4页China Ceramics

基　　金：国家自然科学基金(51172049);"973"计划前期研究专项课题(2012CB722804);材料复合新技术国家重点实验室(武汉理工大学)开放基金(2015-KF-4);广西有色金属及特色材料加工国家重点实验室培育基地(13AA-1)

摘　　要：采用无压烧结技术,在CaO-MgO-Al_2O_3-SiO_2体系中添加稀土氧化镱制备氧化铝基石油压裂支撑剂。通过XRD和SEM等表征手段,研究Yb_2O_3对陶粒支撑剂烧结温度、视密度、酸溶解度、物相组成和显微结构的影响,探究影响机理。实验结果表明:添加稀土Yb2O3能够大幅度提高压裂支撑剂的耐酸性能,酸溶解度比不掺的降低约为30.7%。在烧结过程中,Yb_2O_3与Al_2O_3反应生成Al_5Yb_3O_(12)。通过对样品酸腐蚀前后物相分析,发现Al_5Yb_3O_(12)具有良好的耐酸性能。另外,Yb_2O_3能够改善氧化铝陶瓷的显微结构,提高致密度。腐蚀过程中,支撑剂表面形成一层致密的皮壳,阻碍了酸液对内部的侵蚀,从而提高压裂支撑剂的耐酸性能。The oil fracturing proppant of Yb_2O_3 doped alumina matrix was prepared by pressureless sintering technique in the Ca O-Mg O-Al_2O_3-SiO_2 system.The effect of Yb_2O_3 content on the sintering temperature,acid solubility,phase composition and microstructure was studied through the method of XRD and SEM.The results show that adding Yb_2O_3 can improve the acid resistance of fracturing proppant,the acid solubility was 30.7% lower than that of without doping.The corrosion resistance mechanism of the ceramic proppant is also discussed.On the one hand,Yb_2O_3 can react with Al_2O_3 to form Al_5Yb_3O_（12 ）with good acid resistance during sintering.On the other hand,adding Yb_2O_3 can improve the microstructure and enhance denseness of the alumina ceramic.On the surface of the sample,a passivation layer is generated during the corrosion process.The protective layer can slow down the corrosion rate,which leads to improving the acid resistance of fracturing proppant.

关 键 词：氧化铝陶瓷 压裂支撑剂 Yb_2O_3 耐酸性 耐酸机理 

分 类 号：TE357[石油与天然气工程—油气田开发工程] TE39