| 低渗气藏中气体非线性渗流的特征分析 |
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| 引用本文： | 赵继涛,梁冰.低渗气藏中气体非线性渗流的特征分析[J].辽宁工程技术大学学报(自然科学版),2010,29(6). |
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| 作者姓名： | 赵继涛 梁冰 |
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| 作者单位： | 1. 黑龙江科技学院,数力系,黑龙江,哈尔滨,150027
2. 辽宁工程技术大学,力学与工程学院,辽宁,阜新,123000 |
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| 基金项目： | 国家重点基础研究发展计划基金项目资助(2005CB221503) |
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| 摘 要： | 为了对低渗气藏中气体渗流特征有一个清楚和较为准确的认识,采用实验研究的方法,分析了低渗透储层中气体渗流特征。结果表明:在低渗透储层中,气体渗流表现出明显的非线性渗流特征,并且受多种因素影响;有效应力的增加,会导致岩石渗透率降低,气体在地层中渗流越困难;启动压力梯度增大,气体非线性渗流愈明显;滑脱作用越强,越有利于气体的渗流,提高气藏的产能;相同的压力梯度下含水率越高,渗流速度就越低,储层岩石的初始气测渗透率越低。该成果对天然气开采工程具有一定的参考价值和指导意义。
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| 关 键 词： | 非线性渗流 有效应力 启动压力梯度 滑脱效应 含水饱和度 |
Analysis of gas non-linear characteristics on low-permeability gas reservoirs |
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| ZHAO Jitao,LIANG Bing.Analysis of gas non-linear characteristics on low-permeability gas reservoirs[J].Journal of Liaoning Technical University (Natural Science Edition),2010,29(6). |
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| Authors: | ZHAO Jitao LIANG Bing |
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| Institution: | ZHAO Jitao1,LIANG Bing2(1.College of Mechanics and Engineering,Heilongjiang Technical College,Haerbin150027,China,2.Department of Mechanics and Engineering Sciences,Liaoning Technical University,Fuxin 123000,China) |
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| Abstract: | In order to better understand the characteristics of gas permeability in a low permeability reservoir,an experimental study on gas flow and gas percolation characteristics was conducted in this study.The results show that in a low permeability reservoir,the gas flow has an obvious nonlinear percolation characteristic and is influenced by many factors.For instance,the increase of effective stress leads to the decrease of rock permeability,and the difficulty of gas flow in reservoir.With the increase of start... |
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| Keywords: | nonlinear seepage effective stress start-up pressure gradient slip effect water saturation |
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