石油学报 ›› 2000, Vol. 21 ›› Issue (5): 68-71.DOI: 10.7623/syxb200005014

• 油田开发 • 上一篇    下一篇

N2、CO2和天然气在岩心孔隙内表面的吸附量的测定

欧成华1, 易敏1, 郭平1, 李仕伦1, 伍轶鸣2   

  1. 1. 西南石油学院, 四川南充637001;
    2. 塔里木勘探开发指挥部勘探开发研究院, 新疆库尔勒841000
  • 收稿日期:1999-05-17 修回日期:1999-12-13 出版日期:2000-09-25 发布日期:2010-05-21
  • 作者简介:欧成华,男,1971年5月生,1995年毕业于西南石油学院勘探系石油地质专业,1997年获该院煤田、油气地质与勘探专业硕士学位.现为该院油气田开发专业博士.通讯处:四川省南充市.
  • 基金资助:
    中国石油天然气集团公司“九五”重点科技攻关项目(970506)“天然气开发综合利用新技术”中部分内容.

EXPERIMENTS FOR MEASURING ABSOLUTE ADSORPTION OF N2, CO2AND NATURAL GAS ON CORES

OU Cheng-hua1   

  1. Petroleum Engineering Department of Southwest Petroleum Institute, Nancong 637001, China
  • Received:1999-05-17 Revised:1999-12-13 Online:2000-09-25 Published:2010-05-21

摘要: 利用高精度孔隙度测定仪和气相色谱分析仪,采用恒体积法,测定了室温(283~292K)、低压(0.167~0.3MPa)下N2、CO2和天然气在8个不同的岩心孔隙内表面的吸附量,对于天然气,还测定了吸附前后自由气体的摩尔组成,被吸附气体(吸附相)的摩尔组成和天然气各组分的相对吸附量.实验结果表明:用N2测得的吸附气量在原始气中所占的比例为0.4%~4%不等,CO2的为1%~5%不等,天然气的为3%~6%不等;吸附前后自由天然气的摩尔组成有显著的差异,表明岩心对天然气有明显的吸附;天然气各组分间存在竞争吸附,重质组分的相对吸附量大于轻质组分.

关键词: 气体吸附, 实验, 人造岩心, 多孔介质, 低压, 测定

Abstract: Study on adsorption in porous media of reservoir is very important for phase equilibrium calculation of condensate gas and the right way of insight at the gas or condensate gas reservoir.In this paper,experiments for measuring absolute adsorption of N2, CO2 and natural gas on 8 different artificial cores using an accurate porosimeter and an precise chromatographic instrument under room temperature (283~292°K) and low pressure (0.167~0.3MPa) have been studied.From these experiments,the following results can be obtained:i.The proportion of the N2 adsorbed and that imported into the equipment is about 0.4%~4.0%,and that of CO2 is 1%~5% and natural gas is about 3%~6%;ii.The mole composition between the bulk phase of natural gas after adsorption equilibrium and the original natural gas is different,which is the proof of artificial cores has a obvious adsorption ability to the natural gas; iii. The adsorption capacity of heavy composition of natural gas is more than that of light one.

Key words: gas adsorption, experiment, artificial core, porous media, low pressure

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