| 低渗透岩心渗流过程压力传播特征研究 |
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| 引用本文： | 吕静,刘玉章,李宜坤.低渗透岩心渗流过程压力传播特征研究[J].水动力学研究与进展(A辑),2010,25(6). |
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| 作者姓名： | 吕静 刘玉章 李宜坤 |
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| 作者单位： | 中国石油勘探开发研究院采油所;中国石油勘探开发研究院; |
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| 摘 要： | 深入认识低渗透储层的渗流特征,对如何经济有效开发低渗透油田具有重要指导意义。应用1米长露头岩心渗流模拟系统,研究了低渗透岩心单相渗流过程、恒压水驱油过程中压力动态传播特征,克服了短岩心模拟过程中产生的端面效应,较真实的反映了低渗透储层的渗流特征。低渗透长岩心单相水渗流实验表明,低渗透储层由于应力敏感效应导致渗透率沿渗流方向降低。储层渗透率并非常数,而是孔隙流体压力的函数。低渗透储层内部压力分布呈非线性特征,生产压差越大,岩心内部压力分布的非线性程度增强。压力损失因应力敏感效应主要消耗在生产井近井地带,越靠近生产井,压力分布的非线性程度越明显。恒压水驱油过程中,渗流阻力主要损失在油水两相区。在油水前缘到达各测压点之前,其压力逐渐下降,油水前缘通过该点后,其压力逐渐上升。
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| 关 键 词： | 长岩心 渗流 压力分布 物理模拟 |
Study on pressure propagation characteristics of low permeability core seepage flow |
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| LV Jing,LIU Yu-zhang,LI Yi-kun.Study on pressure propagation characteristics of low permeability core seepage flow[J].Journal of Hydrodynamics,2010,25(6). |
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| Authors: | LV Jing LIU Yu-zhang LI Yi-kun |
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| Affiliation: | LV Jing1,LIU Yu-zhang2,LI Yi-kun(1.Oil Production Department,Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China,2.Research Institute of Petroleum Exploration & Development,China) |
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| Abstract: | Learning more about flow characteristics of low permeability reservoir is significant to develop low permeability oil field cost-effectively.One-meter-long outcrop seepage flow simulator was set up to study the dynamic pressure propagation under the condition of single phase seepage flow and water flooding with constant differential pressure.End effect in short core simulator was eliminated and the seepage characteristics of low permeability reservoir were revealed in this paper.It's showed that,in the sing... |
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| Keywords: | Long core simulator seepage flow pressure distribution physical modeling |
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