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Anti-agglomeration of natural gas hydrates in liquid condensate and crude oil at constant pressure conditions

机译：恒压条件下液态水合物和原油中天然气水合物的抗结块

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摘要

An effective anti-agglomerant (AA) can reduce capillary force between hydrate particles to prevent them from sticking together, therefore preventing the blockage in pipelines. In recent studies, we have reported an AA formulation which shows high effectiveness at low dosage in methaneatural gas hydrates over the entire water-cut range. All our past work, however, was conducted in a closed rocking cell system with n-octane as the hydrocarbon liquid phase. In this work, we investigate the effectiveness of an improved formulation in various systems at constant high pressure (similar to 100 bar natural gas) and high cooling rate (-8 degrees C/h) over the water-cut range of 30-80%. Condensate liquid and crude oil are used as the hydrocarbon liquid phase. Because of the impact of the acidic gases in natural gas, a small amount of lithium hydroxide is included in the new formulation. Lithium hydroxide is more efficient than sodium hydroxide which was used in our previous studies. The dosage is reduced by similar to 40% by mass. We demonstrate the effectiveness of improved AA formulation in an extensive set of measurements. The effect of salinity on the AA effectiveness is also investigated. It is found that increasing salinity can decrease the dosage of base chemical in the formulation significantly. (C) 2016 Published by Elsevier Ltd.
机译：有效的抗凝聚剂（AA）可以降低水合物颗粒之间的毛细作用力，以防止它们粘在一起，从而防止管道阻塞。在最近的研究中，我们报告了一种AA制剂，该制剂在整个含水率范围内的甲烷/天然气水合物中低剂量时显示出很高的功效。但是，我们过去的所有工作都是在一个以正辛烷为烃液相的封闭式摇室系统中进行的。在这项工作中，我们研究了在30％至80％的含水率范围内的恒定高压（类似于100 bar天然气）和高冷却速率（-8摄氏度/小时）下，各种系统中改进配方的有效性。 。冷凝液和原油用作烃液相。由于天然气中酸性气体的影响，新配方中包含了少量的氢氧化锂。氢氧化锂比氢氧化钠在我们以前的研究中使用的更有效。剂量减少了约40质量％。我们在大量测量中证明了改进的AA配方的有效性。还研究了盐度对AA有效性的影响。发现增加盐度可以显着降低制剂中基础化学品的剂量。 （C）2016由Elsevier Ltd.出版

著录项

  • 来源
    《Fuel》 |2016年第15期|187-193|共7页
  • 作者

    Zhao Huangjing; Sun Minwei; Firoozabadi Abbas;

  • 作者单位

    Reservoir Engn Res Inst, 595 Lytton Ave Suite B, Palo Alto, CA 94301 USA;

    Reservoir Engn Res Inst, 595 Lytton Ave Suite B, Palo Alto, CA 94301 USA;

    Reservoir Engn Res Inst, 595 Lytton Ave Suite B, Palo Alto, CA 94301 USA|Yale Univ, Dept Chem & Environm Engn, 9 Hillhouse Ave, New Haven, CT 06511 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Flow assurance; Natural gas hydrates; Anti-agglomerant; Gas condensate; Crude oil;

    机译：流量保证;天然气水合物;抗结块;凝析气;原油;

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