油基纳米封堵防塌剂的制备和评价  

PREPARATION AND EVALUATION OF OIL-BASED NANO PLUGGING AND ANTI SLOUGHING AGENT

作　　者：古晗 马丽华[1] 林凌[1] 邓小刚[1] 宋若男 Gu Han;Ma Lihua;Lin Ling;Deng Xiaogang;Song Ruonan(School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China)

机构地区：[1]西南石油大学化学化工学院,四川成都610500

出　　处：《精细石油化工》2023年第2期1-5,共5页Speciality Petrochemicals

摘　　要：以325目鳞片石墨和高锰酸钾为原料,通过控制高锰酸钾与石墨质量比大于3∶1,制备出粒径分布约200 nm的刚性纳米氧化石墨烯;选取软化点为70℃沥青粉末进行室内氧化。利用FT-IR、热重分析、粒径分布、TEM等手段进行表征。实验结果表明,氧化石墨烯和氧化沥青制备成功;沥青的软化点升高为125℃、分解温度提高至200℃以上。通过刚性材料氧化石墨烯复配能软化变形的氧化沥青,成功制备纳米封堵防塌剂。将3%封堵防塌剂分散在7^(#)白油中进行封堵测试,发现在2 MPa,120℃的条件在孔径为200 nm的微孔滤膜下,30 min内高温高压滤失量为4 mL,封堵性能良好。Oil-based dispersed nano plugging and anti sloughing agent was prepared to reduce the filtration of oil-based high temperature and high pressure to achieve the purpose of plugging nano gap.By controlling the proportion of reagents nano oxide graphene with particle size of about 200 nm was prepared from flake graphite and potassium permanganate.Nanoed-scale plugging and anti sloughing agent was prepared in the oxidized asphalt which can soften and deform and whose decomposition temperature is greater than 200℃.Under the microporous filter membrane with pore diameter of 200 nm,the anti sloughing agent was dispersed in 7#white oil for plugging test.It was found that the filtration loss was 4ml within 30 minutes under the condition of 2 MPa and 120℃,so the plugging performance is good.Using 325 mesh flake graphite and potassium permanganate as raw materials,rigid nano-graphene oxide with a particle size distribution of about 200 nm was prepared by controlling the ratio of potassium permanganate to graphite greater than 3∶1.The asphalt powder with softening point of 70℃ was selected for indoor oxidation.The products were characterized by FT-IR,thermogravimetric analysis,particle size distribution,TEM and other means.The experimental results showed that graphene oxide and asphalt oxide were successfully prepared.The softening point and decomposition temperature of asphalt increase to 125℃ and 200℃,respectively.The nano-blocking agent was successfully prepared by compounding the rigid graphene oxide material with the oxidized asphalt that can soften the deformation.The plugging test was carried out using the agent prepared by dispersing 3%plugging and anti-collapsing agent in 7^(#)white oil.It was found that under the condition of 2 MPa and 120℃,the filtration loss under high temperature and high pressure was 4 mL within 30 min under the microporous filter membrane with a pore size of 200 nm,and the plugging performance was good.

关 键 词：钻井液 封堵防塌剂 油基 纳米 

分 类 号：TE254[石油与天然气工程—油气井工程]