| 摘要: |
| 针对中原油田胡12块油藏非均质性严重及水驱效果差的现状,对原油-空气泡沫的氧化特性、封堵效果及其影 响因素、驱油效果进行模拟试验研究。结果表明:胡12块原油具有较好的氧化活性,温度、压力、含水饱和度与黏土 含量对氧化速率都有影响;空气泡沫的存在对原油静态氧化有一定影响，而对油藏条件下的动态氧化影响不大;气 液比为1:1 ~2:1、温度越低、压力及岩心渗透率越高时,泡沫稳定性越好,封堵能力越强;空气泡沫驱阶段可提高驱油 效率13% ~24%，适用于非均质严重地层提高原油采收率。 |
| 关键词: 空气泡沫 低温氧化 封堵能力 提高采收率 非均质性 |
| DOI： |
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| 基金项目:中国石油化工集团公司先导性科技项目(P06051)；山东省泰山学者建设基金项目(TSXZ2006-15) |
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| Experiment of improved oil recovery by air foam injection low temperature oxidation process |
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YU Hong-min1,REN Shao-ran1,ZUO Jing-luan1,WANG Rui-he1,LIN Wei-min2
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(1.College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China;2. Oil Production Engineering Technology Institute of Zhongyuan Oilfield，Puyang 457001，China)
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| Abstract: |
| Aimed to the poor performance of waterflood due to serious heterogeneity of block Hu 12 in Zhongyuan Oilfield, the simulation experiments of oxidation characteristics，shut-off capability and its influence factors，and oil displacement efficiency were conducted. The results show that the oil of block Hu 12 has good oxidation activity, and the temperature, pressure, water saturation and clay content have effect on oxidation rate. Air foam can reduce oxidation rate at static conditions，but this effect is not significant at dynamic (flooding) conditions. The ratio of air and foaming liquid with a range from 1:1 to 2:1 has much effect on the stability and shut-off capability of air foam. And the stability and shut-off capability of air foam increase with the temperature decreasing, pressure and permeability increasing. Air foam injection can increase oil recovery efficiency by 13%-24% after water flooding in the experiment of sand-pack displacement. This technology could effectively improve oil recovery efficiency of heterogeneous reservoir. |
| Key words: air foam low temperature oxidation shut-off capacity improved oil recovery heterogeneity |
