| 挥发油油藏在注气过程中的相态变化 |
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| 引用本文： | 梅海燕,张茂林,李闽,孙良田.挥发油油藏在注气过程中的相态变化[J].中国海上油气,2003(5). |
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| 作者姓名： | 梅海燕 张茂林 李闽 孙良田 |
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| 作者单位： | 西南石油学院 四川南充637001
(梅海燕，张茂林，李闽)，西南石油学院 四川南充637001(孙良田) |
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| 基金项目： | “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 (PLN990 1)部分研究成果 |
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| 摘 要： | 根据气液两相相平衡热力学模型研究了某挥发油油藏在注天然气过程中油藏体系相态特征的变化规律。挥发油油藏注天然气 ,对原始油藏体系的相态会产生较大的影响 ,表现在P T相图上 :主要改变泡点线 ,而对露点线影响小 ;使气液两相相边界曲线向上方移动 ,临界点也相应地向左上方偏移 ;使泡点线抬高 ,气液两相相边界曲线变宽 ,气液两相区范围扩大。挥发油油藏注天然气 ,使油藏的饱和压力有较大幅度的提高
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| 关 键 词： | 挥发油油藏 注天然气 相态特征 P-T相图 |
THE VARIATION OF PHASE BEHAVIOR IN A VOLATILE OIL RESERVOIR DURING GAS INJECTION |
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| Mei Haiyan,Zhang Maolin,Li Min,Sun Liangtian.THE VARIATION OF PHASE BEHAVIOR IN A VOLATILE OIL RESERVOIR DURING GAS INJECTION[J].China Offshore Oil and Gas,2003(5). |
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| Authors: | Mei Haiyan Zhang Maolin Li Min Sun Liangtian |
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| Abstract: | Based on a thermodynamic model of gas_liquid equilibrium, the variation of phase behavior in a volatile oil system during gas injection has been investigated. The gas injection in volatile oil reservoirs can make a greater impact on the phase behavior of initial oil systems. In the P_T diagram, the impact may have several manifestations: (1) the change of bubble point line is much greater than that of dew point line; (2) the boundary curve between gas and liquid phase moves upwards and the critical point shifts to the up_left accordingly; (3) the bubble point line moves upwards and the range of gas and liquid phase widens. Furthermore, the saturation pressure in a volatile oil reservoir can increase greatly by gas injection. |
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| Keywords: | volatile oil reservoir gas injection phase behavior P_T diagram |
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