油基钻井液主乳化剂OBE-2的合成与性能评价  

Synthesis and performance evaluation of main emulsifier OBE-2 for oil-based drilling fluid

作　　者：马双政 张耀元 南源 陈小娟 陈金定 MA Shuang-zheng;ZHANG Yao-yuan;NAN Yuan;CHEN Xiao-juan;CHEN Jin-ding(CNOOC Experimental Center,CNOOC Ener Tech-Drilling&Productution Co.,Zhanjiang 524057,China;CNOOC Experimental Center,CNOOC Ener Tech-Drilling&Productution Co.,Haikou 570100,China;Key Laboratory for Complex Oil and Gas Reservoirs of Exploration and Development in Nanhai,Guangdong Province,Zhanjiang 524057,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,广东湛江524057 [2]中海油能源发展股份有限公司工程技术分公司,海南海口570100 [3]广东省南海复杂油气藏勘探开发重点实验室,广东湛江524057

出　　处：《化学工程师》2025年第2期53-58,17,共7页Chemical Engineer

摘　　要：本文通过酰胺化反应、醚化反应合成了一种新型亲油性主乳化剂OBE-2,以提高油基钻井液的乳化稳定性。利用红外光谱和核磁共振实验方法表征了该乳化剂OBE-2的性能及乳状液的分子结构特征。实验结果表明,合成的乳化剂结构中含有相应基团,乳化稳定性能优异,乳化率可达95%,220℃高温老化后破乳电压高达590V以上,同时,配制了一种密度为2.4g·cm^(-3)的油基钻井液体系,其抗温可达200℃,抗盐达20%,破乳电压超过900V,流变性和滤失性能稳定,具有很好的应用前景。This paper synthesized a new type of oil-soluble main emulsifier OBE-2 through amide reaction and etherification to improve the emulsification stability of oil-based drilling fluid.The performance and molecular structure features of the emulsifier OBE-2 were characterized by infrared spectroscopy and nuclear magnetic resonance experimental methods.The experimental results show that the synthesized emulsifier has the corresponding functional groups,with excellent emulsification stability,emulsification rate up to 95%,and a high breakdown voltage of more than 590V at 220℃high-temperature aging.At the same time,a drilling fluid system with a density of 2.4g·cm^(-3) was prepared,which has a high temperature resistance of 200℃and a salt resistance of 20%,a high breakdown voltage of over 900V,stable rheological and filtration properties,and has great application prospects.

关 键 词：主乳化剂 破乳电压 分子结构 油基钻井液 性能稳定 

分 类 号：TE254.4[石油与天然气工程—油气井工程]