水基钻井液复合纳米成膜封堵剂的制备及性能  

Preparation and properties of composite nano film-forming sealing agent for water-based drilling fluid

作　　者：崔彦琦 于洪江[1] 雷亮 李金涛 黄鹤云 CUI Yanqi;YU Hongjiang;LEI Liang;LI Jintao;HUANG Heyun(College of Chemistry and Chemical Engineering,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China;Yantai Taihe Xingtong New Materials Co.,Ltd.,Qingdao 264006,Shandong,China)

机构地区：[1]西安石油大学化学化工学院,陕西西安710065 [2]烟台泰禾兴彤新材料有限公司,山东青岛264006

出　　处：《精细化工》2024年第9期2031-2037,共7页Fine Chemicals

基　　金：西安石油大学研究生创新与实践能力培养项目(YCS22213092)。

摘　　要：以改性纳米SiO_(2)为刚性粒子,丙烯酰胺、2-丙烯酰胺基-2-甲基丙磺酸、苯乙烯和醋酸乙烯酯为聚合单体,壬基酚聚氧乙烯醚(10)和十二烷基磺酸钠为乳化剂,过硫酸铵和亚硫酸氢钠为引发剂,合成了一种有机/无机复合纳米成膜封堵剂。采用FTIR、SEM、动态光散射(DLS)和TGA对产物进行了表征和测试。考察了不同质量分数复合纳米成膜封堵剂对水基钻井液的流变性、滤失性及封堵性能的影响。结果表明,复合纳米成膜封堵剂呈球形,并保持纳米级分布,中值粒径为325 nm;340℃时的质量损失率为14%;120℃、16 h老化后较老化前表观黏度和塑性黏度均明显增加。当复合纳米成膜封堵剂质量分数为3%时,水基钻井液的静滤失量为10 mL;当质量分数≥2%后,砂床滤失量为0;当质量分数从0增至4%时,高温高压滤失量从104 mL减至29 mL,渗透性为1.56×10^(–2)mD,封堵率为90.7%。A organic/inorganic composite nano film-forming sealing agent was synthesized using modified nano SiO_(2)as rigid particles,acrylamide,2-acrylamido-2-methylpropane sulfonic acid,styrene,and vinyl acetate as polymerization monomers,nonylphenol polyoxyethylene ether(10)and sodium dodecyl sulfonate as emulsifying agents,and ammonium persulfate and sodium bisulfite as initiators,and then characterized by FTIR,SEM,dynamic light scattering(DLS)and TGA.The effects of mass fraction of composite nano film-forming sealing agent on rheological properties,filtration properties,and sealing performance of water-based drilling fluids were studied.The results indicated that the composite nano film-forming sealing agent was spherical in morphology and maintained a nanoscale distribution with a median particle size of 325 nm,while showed a mass loss rate of 14%at 340℃and increment in apparent viscosity and plastic viscosity after aging at 120℃for 16 h.When the mass fraction of composite nano film-forming sealing agent was 3%,the static filtration loss of water-based drilling fluid was 10 mL;When that was≥2%,the filtration loss of the sand bed was 0,when that increased from 0 to 4%,the high-temperature and high-pressure filtration loss was reduced from 104 mL to 29 mL,the permeability was 1.56×10^(–2)mD,and the sealing rate was 90.7%.

关 键 词：水基钻井液 成膜封堵剂 纳米 井壁稳定 油田化学品 

分 类 号：TE254[石油与天然气工程—油气井工程]