| 摘要: |
| 针对水合物抑制剂用量大、应用效率低的问题,采用数值模拟方法研究了甲醇、乙二醇、二甘醇、三甘醇、乙醇5种热力学抑制剂在不同含量下对水合物生成抑制效果的变化规律,并对不同种类不同含量下抑制剂的性能进行了评价。结果 表明:5种热力学抑制剂均对水合物有抑制作用,且随着总含量的累积,乙二醇单位含量抑制效果逐渐增强,二甘醇和乙醇单位含量抑制效果逐渐减弱,三甘醇单位含量抑制效果先变小后变大,甲醇单位含量抑制效果基本不变；摩尔分数小于10%或大于20%时,三甘醇抑制性能最好,中等含量下乙二醇抑制效果较好,整个范围内,乙醇和二甘醇抑制效果较差；研究结果可为水合物抑制剂的选用提供参考,以便节约成本,达到高效利用抑制剂的目的。 |
| 关键词: 水合物抑制剂 抑制效果 天然气水合物 流动保障 数值模拟 |
| DOI：10.3969/j.issn.1007-3426.2020.02.008 |
| 分类号: |
| 基金项目:国家自然科学基金面上项目“液力-磁耦合自旋转井眼清洁工具的旋转传动机理研究”(51674087)；国家科技重大专项课题“复杂结构丛式井钻井水力学与井眼清洁配套技术”(2017ZX05009-003)；东北石油大学研究生创新科研项目“深水钻井过程中天然气水合物黏聚机理及流动保障研究”(YJSCX2017-008NEPU) |
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| Numerical simulation study on performance evaluation and change law of hydrate thermodynamic inhibitor |
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Chen Ye1, Yan Tie1, Sun Xiaofeng1, Hou Zhaokai1, Wang Kewen2, Gao Zhixing3
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1. College of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang, China;2. College of Architecture and Civil Engineering, Xi 'an University of Science and Technology, Xi 'an, Shaanxi, China;3. Downhole Operation Branch of PetroChinaWestern Drilling Engineering Co., Ltd, Karamay, Xinjiang, China
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| Abstract: |
| In order to solve the problems of high consumption and low efficiency of hydrate inhibitors, the inhibition effects of five thermodynamic inhibitors including methanol, ethylene glycol, diethylene glycol, triethylene glycol and ethanol with different contents on hydrate formation were studied by numerical simulation, and their inhibition performances were also evaluated. The results show that all the five thermodynamic inhibitors have inhibition effect on hydrate formation, and with the accumulation of total content, the inhibition effect of unit content of ethylene glycol gradually increased, unit content of diethylene glycol and ethanol gradually weakened, the unit content of triethylene glycol decreased first and then increased, unit content of methanol basically unchanged respectively. When the molar fraction is less than 10% or more than 20%, the inhibition performance of triethylene glycol is the best. Moreover, ethylene glycol is better at medium content, but ethanol and diethylene glycol are poor in the whole range. The results can provide a reference for the selection of hydrate inhibitors to save cost and achieve the purpose of efficient utilization. |
| Key words: hydrate inhibitor inhibition effect gas hydrate flow assurance numerical simulation |
