| 低渗透砂岩储层应力敏感性研究 |
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| 引用本文： | 孙玉学,孔翠龙,王瑛琪. 低渗透砂岩储层应力敏感性研究[J]. 科学技术与工程, 2009, 9(15) |
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| 作者姓名： | 孙玉学 孔翠龙 王瑛琪 |
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| 作者单位： | 大庆石油学院,大庆,163318;胜利石油管理局孤岛采油厂,东营,257300 |
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| 摘 要： | 低渗透砂岩储层在开采过程中,随着有效应力的升高将会发生渗透率应力敏感,导致渗透率的下降.在考虑储层原地应力的情况下,对吉林油田新326块油层岩芯进行了实验研究.结果表明:该区块的应力敏感性不强,变化规律符合指数关系式,高渗岩芯的应力敏感性高于低渗岩芯.此外,通过实验及理论分析表明;渗透率相对较小的岩芯在加载卸载过程中的渗透率损失相对较大,加载卸载过程将引起岩石的弹塑性变形,这是导致渗透率下降并不能完全恢复的主要原因.
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| 关 键 词： | 低渗透砂岩 渗透率 应力敏感性 加载卸载实验 |
Stress Sensitivity of Low-permeability Sandstone Reservoir |
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| SUN Yu-xue,KONG Cui-long,WANG Ying-qi. Stress Sensitivity of Low-permeability Sandstone Reservoir[J]. Science Technology and Engineering, 2009, 9(15) |
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| Authors: | SUN Yu-xue KONG Cui-long WANG Ying-qi |
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| Affiliation: | Daqing Petroleum Institute;Daqing 163318;P.R.China;Gudao Oil Recovery Factory of Shengli Petroleum Administration1;Dongying 257300;P.R.China |
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| Abstract: | In the time of low-permeability sandstone reservoir explored,effective stress rise gradually,stress sensitivity has happened,which cause permeability decline. Allowing to initial geostress,the study on Jilin oil field xin326 oil layer and made the rock core experiment are presented. The experimental results show that the stress sensitivity of this oil layer is small;the regularity of permeability changes is in accordance with exponential function .The stress sensitivity of high permeability core is larger t... |
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| Keywords: | low-permeability sandstone permeability stress sensitivity load and unload process |
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