改性二氧化硅封堵剂的制备及性能评价  

Preparation and Evaluation of the Modified Silica Dioxide as Plugging Agent

作　　者：党海锋[1] 刘刚[1] Dang Haifeng;Liu Gang(Oilfield Chemicals R&D Institute of COSL,Sanhe 065201,China)

机构地区：[1]中海油田服务股份有限公司油田化学研究院,河北三河065201

出　　处：《山东化工》2024年第9期48-50,共3页Shandong Chemical Industry

摘　　要：为了降低水基钻井液滤液对储层的扰动,以丙烯酰胺、苯乙烯、乙烯基三甲氧基硅烷对纳米SiO_(2)进行表面改性,将柔性链聚合物接枝在纳米刚性SiO_(2)粒子表面,形成一种新型的有机-无机复合封堵剂。实验结果发现:该封堵剂提高了泥饼的致密性和封堵性能,并对岩心孔隙进行了有效封堵,有效抑制岩屑水化现象,为水基钻井液在低渗-致密储层开发过程中的应用提供技术支持。In order to reduce the disturbance of water-based drilling fluid filtrate to the reservoir,acrylamide,styrene and vinyl trimethoxysilane were used to modify the surface of nano-silica dioxide in this paper.And the flexible chain polymer was grafted on the surface of nano-silica dioxide particles to form a new organic-inorganic composite plugging agent.The experimental results showed that the plugging agent can improve the densification and plugging performance of mud cake,effectively sealed the core pores,effectively inhibited the hydration phenomenon of cuttings,and provided technical support for the application of water-based drilling fluid in the development process of low permeability and tight reservoir.

关 键 词：封堵剂 水基钻井液 封堵性能 纳米二氧化硅 滤失量 

分 类 号：TQ127.2[化学工程—无机化工] TE254[石油与天然气工程—油气井工程]