| 高压悬滴法测定 CO 2 -原油最小混相压力 |
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| 引用本文： | 黄春霞,汤瑞佳,余华贵,江绍静. 高压悬滴法测定 CO 2 -原油最小混相压力[J]. 岩性油气藏, 2015, 27(1): 127-130. DOI: 10.3969/j.issn.1673-8926.2015.01.019 |
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| 作者姓名： | 黄春霞 汤瑞佳 余华贵 江绍静 |
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| 作者单位： | 陕西延长石油（集团）有限责任公司 研究院，西安 710075 |
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| 基金项目： | 国家科技支撑计划项目“陕北煤化工CO2捕集、埋存与提高采收率技术示范”(编号:2012BAC26B00)资助 |
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| 摘 要： | CO 2 - 原油体系的最小混相压力是 CO 2 驱油技术研究中的一个重要参数。 采用高压悬滴法测定了延长油田特低渗油藏原油在 44 ℃ 油藏温度下 CO 2 - 原油体系界面张力随压力的变化。 实验结果表明： CO 2 -原油两相间的界面张力随体系压力的升高而呈近线性下降趋势。 根据外推法得出两相体系界面张力为0 时的最小混相压力为 23.56 MPa 。 利用该方法既可以较精确地得到 CO 2 - 原油体系最小混相压力数据，又可以直接地观察到 CO 2 - 原油混相互溶时的状态。 实验操作时间较短，且简单易行，对同类实验的测定方法具有一定的参考价值。
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| 关 键 词： | 界面张力 最小混相压力 二氧化碳 悬滴法 |
Determination of the minimum miscibility pressure of CO2 and crude oil system by hanging drop method |
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| HUANG Chunxia,TANG Ruijia,YU Huagui,JIANG Shaojing. Determination of the minimum miscibility pressure of CO2 and crude oil system by hanging drop method[J]. Northwest Oil & Gas Exploration, 2015, 27(1): 127-130. DOI: 10.3969/j.issn.1673-8926.2015.01.019 |
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| Authors: | HUANG Chunxia TANG Ruijia YU Huagui JIANG Shaojing |
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| Affiliation: | Research Institute of Shaanxi Yanchang Petroleum （ Group ） Co. Ltd. ， Xi ’ an 710075 ， China |
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| Abstract: | The minimum miscibility pressure of CO 2 and crude oil system is an important parameter for the research of CO 2 flooding technology. The interfacial tension data of CO 2 and crude oil system were measured by pendant drop method under the conditions of reservoir temperature of 44℃ and different pressure. The oil samples are produced in low permeability reservoir of Yanchang Oilfield. The experiment results show that the interfacial tension of CO 2 and crude oil decreased almost linearly as increasing pressure. According to the extrapolated method, the minimum miscibility pressure is 23.56 MPa when the interfacial tension of CO 2 and crude oil is zero. This method can be used to not only obtain the minimum miscibility pressure of CO 2 and crude oil system, but also directly observe the miscible phase picture of CO 2 and crude oil. The experiment is easier in operation and needs less time than the others, so it has a certain reference value on the measurement for similar experiments. |
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| Keywords: | dolomitized rocks “white smoke type&rdquo exhalative rock new type of tight oil reservoir Lower Permian Fengcheng Formation Urho area Junggar Basin |
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