新疆石油地质 ›› 2002, Vol. 23 ›› Issue (3): 233-235.

• 油藏工程 • 上一篇    下一篇

毛细凝聚和吸附-脱附回路的物理化学解释

汪政德1, 张茂林1, 梅海燕1, 孙良田1, 李士伦1, 吴清松2   

  1. 1.西南石油学院,四川 南充 637001;
    2.中国科学技术大学,安徽 合肥 230026
  • 收稿日期:2001-10-10 出版日期:2002-06-01 发布日期:2020-08-07
  • 作者简介:汪政德(1964-),男,四川南部,在读博士,主要从事油气田开发工程研究。
  • 基金资助:
    油气藏地质及开发工程国家重点实验室”开放基金资助项目,编号PLN9902

The Physical Chemistry Explanation of the Capillary Condensation and the Circuit of Adsorption-Desorption

WANG Zheng-de, ZHANG Mao-lin, MEI Hai-yan, SUN Liang-tian, LI Shi-lun, WU Qing-song   

  • Received:2001-10-10 Online:2002-06-01 Published:2020-08-07
  • About author:WANG Zheng-de (1964-), Male, Doctor Candidate, Oil-Gas Field Development Engineering, Southwest Petroleum Institute, Nanchong, Sichuan 637001, China

摘要: 在测定多孔介质的吸附等温线时,常出现脱附滞后现象,即在同一压力下,吸附等温线与脱附等温线不相重合,脱附曲线高于吸附曲线,形成所谓“吸附-脱附回路”。从物理化学中亚稳状态的基本理论出发,得到平面液体的饱和蒸气压与微小液滴的饱和蒸气压之间的关系—开尔文(Kelvin)方程,利用该方程解释了毛细凝聚现象,论证了产生吸附-脱附回路现象的原因,分析了在多孔介质中毛细管压力对油气体系相平衡的影响。

关键词: 凝聚, 吸附, 脱附, 毛细管压力, 亚稳状态, 开尔文(Kelvin)方程

Abstract: The desorption lag phenomenon is often appeared when measuring the adsorption isotherm of the porous media, that is the desorption isotherm is higher than the adsorption isotherm at the same pressure, shaping the circuit of adsorption and desorption. The Kelvin equation to be used for describing the relationship between a small drop and a plane of liquid is derived from the basic metastabel state theory of physical chemistry. The capillary condensation phenomenon, the adsorption-desorption circuit, and the capillary pressure effect on the phase equilibrium of the oil-gas system are well explained by using the Kelvin equation.

Key words: capillary condensation, adsorption, desorption, capillary pressure, metastable state, Kelvin equation

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