| 低渗透油藏自发渗吸驱油实验研究 |
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| 引用本文： | 李士奎,刘卫东,张海琴,萧汉敏. 低渗透油藏自发渗吸驱油实验研究[J]. 石油学报, 2007, 28(2): 109-112. DOI: 10.7623/syxb200206022 |
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| 作者姓名： | 李士奎 刘卫东 张海琴 萧汉敏 |
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| 作者单位： | 1. 中国科学院广州地球化学研究所, 广东广州, 510630;2. 大庆油田有限责任公司第五采油厂, 黑龙江大庆, 163453;3. 中国石油勘探开发研究院廊坊分院, 河北廊坊, 065007 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 通过低渗透亲水岩心自发渗吸实验,探讨了低渗透油藏不同界面张力体系的渗吸驱油过程。研究结果表明,注入水渗吸体系因毛细管力较高、毛细管力与重力比值较大,其渗吸过程为毛细管力支配下的逆向渗吸。与注入水渗吸结果相比,化学剂溶液因降低油水界面张力,在孔隙介质中能使更多的原油参与渗流过程,使更多的剩余油变为可动油,提高了渗吸平衡时的原油采出程度,因而提高了低渗透油藏原油的采收率。
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| 关 键 词： | 低渗透油藏 渗吸驱油实验 界面张力 毛细管力 可动油 原油采收率 |
| 文章编号： | 0253-2697（2007）02-0109-04 |
| 收稿时间： | 2006-03-26 |
| 修稿时间： | 2006-03-26 |
Experimental study of spontaneous imbibition in low-permeability reservoir |
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| Li Shikui,Liu Weidong,Zhang Haiqin,Xiao Hanmin. Experimental study of spontaneous imbibition in low-permeability reservoir[J]. Acta Petrolei Sinica, 2007, 28(2): 109-112. DOI: 10.7623/syxb200206022 |
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| Authors: | Li Shikui Liu Weidong Zhang Haiqin Xiao Hanmin |
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| Affiliation: | 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510630, China;2. The Fifth Oil Production Plant, Daqing Oilfield Limited Company, Daqing 163453, China;3. Langfang Branch of PetroChina Exploration and Development Research Institute, Langfang 065007, China |
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| Abstract: | The spontaneous imbibition process of solution with different interfacial tension in low permeability reservoir was investigated experimentally by low permeability (about 0.004μm2) water wet oil saturated sandstone cores.The result showed that the fluid flow for the water wet system is countercurrent at high capillary force. Especially in the presence of brine and high interfacial tension, the imbibition process was entirely governed by capillary force.The evaluation of the positive changes in recovery rate and ultimate recovery compared to the brine imbibition showed that the low interfacial tension made the residual oil more easily to flow and enhanced oil recovery of surfactant imbibition in low permeability reservoirs. |
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| Keywords: | low-permeability reservoir imbibition experiment interfacial tension capillary force mobile oil oil recovery |
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