石油化工高等学校学报

石油化工高等学校学报 ›› 2017, Vol. 30 ›› Issue (5): 86-92.DOI: 10.3969/j.issn.1006-396X.2017.05.016

• 油气储运 • 上一篇    下一篇

CO2溶胀和CH4协同作用下长庆原油流动性的改善

李传宪1,阎孔尧1,杨 爽1,夏 政2,王 博2,杨 飞1   

  1. (1.中国石油大学(华东)储运与建筑工程学院,山东青岛266580;2.西安长庆科技工程有限责任公司,陕西西安710021)
  • 收稿日期:2017-02-21 修回日期:2017-03-15 出版日期:2017-10-31 发布日期:2017-11-10
  • 作者简介:李传宪(1963-),男,博士,教授,从事原油流变学、稠油/含蜡原油化学及物理化学改性的研究;E-mail:lchxian@upc.edu.cn。
  • 基金资助:
    中央高校基本科研业务费专项资金资助(15CX06066A)。

CO2 Swelling and Synergistic Effect of CH4 on Rheological Improvement of Changqing Crude Oil

  1. (1.College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao Shandong 266580,China; 2.Xi'an Changqing Technology Engineering Co., Ltd.,Xi'an Shaanxi 710021,China)
  • Received:2017-02-21 Revised:2017-03-15 Published:2017-10-31 Online:2017-11-10

摘要: 以CO2、CH4 混合气为气源,在地层条件下利用自主研制的饱和溶气原油装置对长庆原油进行预处理,通过逐级降压得到地面集输工况(0~3.5MPa)下的饱和溶气原油。通过溶气原油物性测试装置与高压流变仪分析了气体组成、温度、压力等对饱和溶气原油溶解度Rs、体积系数Bo、凝点TZ、黏度μ 和屈服值τy 的影响规律, 并讨论混合气稀释效应与溶胀效应对长庆原油的影响。结果表明,随着压力升高,Rs、Bo 升高,随着温度降低,Rs 升高,Bo 降低;相同温度、压力下,Rs(CO2)约为Rs(CH4 )的2倍,但CH4 的溶解明显促进了CO2对长庆原油的溶胀效果;n(CO2)/n(CH4 )=9∶1混合气对长庆原油的溶胀作用最佳,且对长庆原油凝点、黏度和屈服值的改善效果最优。

关键词: CO2,    ,  甲烷,    ,  溶气特性,    , 流变特性

Abstract: Based on different proportions of CO2 and CH4 mixture gas source, the experiment pretreated Changqing oil by using selfmade saturated dissolved gas crude oil processing device under simulated stratum conditions, and then saturated dissolved gas crude oil was got through step by step depressurizing under gathering and transportation conditions (0~3.5 MPa). Crude oil's solubility (Rs), volume factor (Bo), condensation point (TZ), viscosity (μ) and yield value (τy) were studied by using highpressure equipment, which could measure properties of live oil, and highpressure rheometer. The results showed that Rs and Bo increased with the increase of pressure. As the temperature increased, Rs decreased and Bo increased. When experiments were conducted with the same temperature and pressure, Rs (CO2) was the double of Rs(CH4), and the Rs of mixture gas was between the two formers, and the crude oil got better expansion effect with the mixture gas. Among mixture gas, molar ratio of 9∶1 (n(CO2)/n(CH4)) had the best expansion effect, and such mixture gas had best improvement of crude oil's condensation point, viscosity and yield value.

Key words: Carbon dioxide,    ,  Methane,    ,  Solubility,   ,  Rheological properties

引用本文

李传宪,阎孔尧,杨 爽. CO2溶胀和CH4协同作用下长庆原油流动性的改善[J]. 石油化工高等学校学报, 2017, 30(5): 86-92.

Li Chuanxian,Yan Kongyao,Yang Shuang,et al. CO2 Swelling and Synergistic Effect of CH4 on Rheological Improvement of Changqing Crude Oil[J]. Journal of Petrochemical Universities, 2017, 30(5): 86-92.

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