聚合物基纳米SiO_2的制备及钻井液性能  

Synthesis and drilling fluid performance of polymer based nano-silica composite

作　　者：毛惠[1] 邱正松[1] 付建国 沈忠厚[1] 黄维安[1] 刘均一[1] 马永乐[3] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]西部钻探准东钻井泥浆公司,新疆准东831511 [3]天津中油渤星工程科技有限公司,天津300451

出　　处：《中南大学学报（自然科学版）》2015年第7期2564-2570,共7页Journal of Central South University:Science and Technology

基　　金：国家科技重大专项(2011ZX05021-004);中央高校基本科研业务费专项资助项目(15CX06019A;YCX2015019);中国石油集团公司重大专项(2014E-38-02)~~

摘　　要：以丙烯酰胺、马来酸酐和N,N-二甲基丙烯酰胺为反应单体,合成三元共聚物P(AMD),并以该三元共聚物为基体,纳米二氧化硅为填料,研制一种具有"核壳"结构的新型微纳米钻井液添加剂SDNP。借助TEM、粒径分布和GPC实验表征SDNP的微观形貌特征和相对分子质量,讨论SDNP对水基钻井液流变性及滤失性的影响,通过抗温性能、粒度分布、抑制性和润滑性室内实验综合评价和分析SDNP的性能及作用机理。研究结果表明:SDNP可显著改善钻井液体系流变性能,提高动塑比,使钻井液粒径分级合理,滤失量降低明显,耐温高达180℃以上,且抑制性和润滑性能突出,当SDNP质量分数为0.5%时,页岩回收率高达94%,而页岩膨胀率仅为2.3%,相对于基浆极压润滑系数降低率高达93.4%。The P（AMD） terpolymer was compounded by acrylamide （AM）, maleic anhydride （MAH） and N,N-dimethyl acrylamide as reactive monomer. This terpolymer was used as matrix, and nano-scilica as filler to synthetize a new micro-nano drilling fluid additives SDNP with Core-shell structure. The microstructure identities and relative molecular mass of this polymer were tested by experiments including TEM, measurement of the diameter distribution and GPC. And the influence of SNDP on theological property and filtration of water-based drilling fluid was also discussed. Furthermore, the characters and mechanism of SNDP were evaluated and analyzed by evaluating experiments of temperature resistance, particle size distribution, inhibitory and lubricity. The results show that SNDP can improve the rheotogy of drilling fluid and dynamic plastic ratio significantly, that size grading is reasonable, that filtration volume is reduced obviously, and that heat-resistant can reach above 180 ℃. What＇s more, inhibition and lubrication performance are outstanding. At the mass fraction of 0.5%, shale recovery rate is as high as 94%, shale inflation rate is only 2.3%, and the reduced rates of extreme pressure lubrication coefficient relative to base slurry can reach 93.4%.

关 键 词：纳米二氧化硅 钻井液 微纳米 复合材料 聚合物基纳米材料 

分 类 号：TE254[石油与天然气工程—油气井工程]