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Nano-fluid loss agent based on an acrylamide based copolymer 'grafted' on a modified silica surface

机译：基于丙烯酰胺基共聚物“接枝”在改性二氧化硅表面上的纳米流体损失剂

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摘要

In this paper, the nano copolymer of acrylamide (AM), 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS), and modified nano-silica (M-SiO2) was synthesized by free radical polymerization in a water solution. The addition of ethanol was used to control the molecular weight of the copolymer. The characterization of the copolymer was measured by Fourier transform infrared spectroscopy, a particle size analyzer, transmission electron microscopy, atomic force microscopy and nuclear magnetic resonance. AM and AMPS were grafted on the surface of M-SiO2 successfully. The grafted copolymer was in nm size not only in the water solution but also in a drilling fluid. Filtration properties and the interaction mechanism of the copolymer with montrillonite (MMT) were studied in a fresh water drilling fluid system and different kinds of salt water drilling fluid systems. The copolymer as fluid loss agent was equal to commonly used fluid loss agents in a fresh water drilling fluid system. The resistance properties to salinity, calcium and high temperature were tested. The copolymer had a resistance temperature of 150 degrees C and saturated brine resistance. The resistance property to calcium was up to 1 wt%. The interaction mechanism between montrillonite and the copolymer was evaluated using a particle size analyzer, transmission electron microscopy, scanning electron microscopy and a surface area analyzer. The copolymer was adsorbed on the surface of MMT. Compared to pristine MMT, the addition of the copolymer resulted in new peaks in the particle size analyzer image. The filter liquor of the drilling fluid with the copolymer showed two peaks in nm scale and the filter liquor of the drilling fluid without the copolymer showed that no peak appeared under 1000 nm. The results presented that the copolymer as a fluid loss agent was a nano material in the drilling fluid. The surface area analyzer (BET) results showed that the surface area of a natural rock reduced after treatment with the copolymer, indicating that the copolymer entered into the nanopores of shale because of the adsorption on the surface of shale.
机译：本文通过水溶液中的自由基聚合，合成了丙烯酰胺（AM），2-丙基丙酰胺-2-甲基-1-丙烷磺酸（AMPS）和改性纳米二氧化硅（M-SiO 2）的纳米共聚物。使用乙醇的添加来控制共聚物的分子量。通过傅里叶变换红外光谱，粒度分析仪，透射电子显微镜，原子力显微镜和核磁共振测量共聚物的表征。 AM和AMPS成功地嫁接了M-SiO2的表面。接枝的共聚物不仅在水溶液中的NM尺寸，而且在钻井液中。在淡水钻井液系统和不同种类的盐水钻井液系统中研究了与蒙特隆钛矿（MMT）的过滤性质和共聚物的相互作用机理。作为流体损失剂的共聚物等于淡水钻井液系统中的常用流体损失剂。测试盐度，钙和高温的抗性特性。共聚物的电阻温度为150℃和饱和盐水抗性。钙的抵抗性高达1wt％。使用粒度分析仪，透射电子显微镜，扫描电子显微镜和表面积分析仪评估蒙特隆钛矿和共聚物之间的相互作用机理。将共聚物吸附在MMT的表面上。与原始MMT相比，添加共聚物导致粒度分析仪图像中的新峰。具有共聚物的钻井液的过滤液显示NM刻度中的两个峰值，并且钻井液的过滤液没有共聚物显示，没有峰值出现在1000nm以下。结果表明，作为流体损失剂的共聚物是钻井液中的纳米材料。表面积分析仪（BET）结果表明，用共聚物处理后天然岩石的表面积减少，表明共聚物由于页岩表面的吸附而进入页岩的纳米孔中。

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  • 来源
    《RSC Advances》 |2016年第21期|共10页
  • 作者

    An Yuxiu; Jiang Guancheng; Qi Yourong; Ge Qingying; Zhang Lingyu;

  • 作者单位

    China Univ Petr State Key Lab Petr Resources &

    Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources &

    Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources &

    Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources &

    Prospecting Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Petr Resources &

    Prospecting Beijing 102249 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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