钟立国,马帅,鲁渊,王彦超,高立明
ZHONG Liguo,MA Shuai,LU Yuan,WANG Yanchao,GAO Liming

• 1:中国石油大学提高采收率研究院
• 2:东北石油大学石油工程学院
• 3:中石化胜利石油工程有限公司

摘要(Abstract)：

高温高压下,稠油与CO_2、N_2或CH_4等气体之间的界面张力数据,具有十分重要的理论和实用价值。在不同温度和压力下,采用ADSA方法(对称液滴形状分析法)测量了渤海稠油与CO_2、N_2或CH_4体系的平衡界面张力。实验结果表明,在不同温度和压力下,渤海稠油与CO_2、N_2或CH_4体系的界面张力由小到大的顺序依次为CO_2、CH_4或N_2。对于稠油与CO_2体系,当压力低于CO_2临界压力(7.39 MPa)时,升高温度对界面张力影响不大;当压力高于CO_2临界压力时,升高温度对界面张力影响明显变大。对于稠油与CH_4体系,由于高温蒸馏的作用造成150℃时界面张力要高于100℃,而温度对稠油与N_2体系界面张力的影响不明显。增大压力可使稠油与CO_2、CH_4和N_2体系的界面张力分别降低60%~70%、40%~50%和20%~30%。
There are very valuable theoretical and practical values for the interfacial tension(IFT) data between the heavy oil and CO_2,N_2 and CH_4 under the conditions of high temperatures and high pressures.The IFTs between Bohai heavy oil and above gases are measured under different temperatures and pressures by means of ADSA(Ax Symmetric Drop Shape Analysis) method.The experimental results show that the sequence of the IFTs for the stated systems is CO_2,CH_4 and N_2 in ascending order.For the system between the heavy oil and CO_2,when the pressure is lower than the critical pressure of CO_2(7.39 MPa),the effects of the temperature increment on the interfacial tension is not so serious;however,when the pressure is larger than the critical pressure of CO_2,the results are just opposite.For the system between the heavy oil and CH_4,the interfacial tension at 150 ℃ is larger than that at 100 ℃ due to the effects of the high-temperature distillation,while the effects of the temperature on the system between the heavy oil and N_2 are not obvious.The increments of the pressures can seperately reduce the above IFTs by 60%-70%for CO_2,40%-50%for CH_4 and 20%-30%for N_2.

关键词(KeyWords)： 对称液滴形状分析法;高温高压;油气界面张力;稠油
Ax symmetric drop shape analyzing(ADSA) method;high temperature and high pressure;the interfacial tension between oil and gas;heavy oil

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51004024和51174041);; 中国石油科技创新基金研究项目(2011D-5006-0203)

作者(Author): 钟立国,马帅,鲁渊,王彦超,高立明
ZHONG Liguo,MA Shuai,LU Yuan,WANG Yanchao,GAO Liming

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