| 页岩气井渗流机理及产能递减分析 |
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| 引用本文： | 李建秋,曹建红,段永刚,何玮.页岩气井渗流机理及产能递减分析[J].天然气勘探与开发,2011,34(2):34-37. |
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| 作者姓名： | 李建秋 曹建红 段永刚 何玮 |
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| 作者单位： | "油气藏地质及开发工程"国家重点实验室·西南石油大学 |
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| 摘 要： | 在研究页岩气藏特征及渗流规律的基础上,建立了考虑解析作用的页岩气井渗流微分方程,求解了定生产压力圆形封闭地层中心一口垂直页岩气井的无因次Laplace空间流量解,并通过Stehfest数值反演绘制了页岩气井无因次的产能递减曲线。研究表明,页岩气井达到拟稳态流动时间比常规气井晚,其生产周期长;Langmuir体积对产能递减的影响是线性的,而Langmuir压力的影响是非线性的。
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| 关 键 词： | 页岩气 气藏特征 渗流模型 产能递减 Langmuir定律 |
Seepage Mechanism and Productivity Decline of Shale-Gas Well |
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| LI Jianqiu,CAO Jianhong,DUAN Yonggang,HE Wei.Seepage Mechanism and Productivity Decline of Shale-Gas Well[J].Natural Gas Exploration and Development,2011,34(2):34-37. |
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| Authors: | LI Jianqiu CAO Jianhong DUAN Yonggang HE Wei |
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| Affiliation: | LI Jianqiu,CAO Jianhong,DUAN Yonggang and HE Wei(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University). |
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| Abstract: | Based on the properties of shale-gas reservoir and its seepage law,a differential equation considering desorption is established.Dimensionless Laplace space flow of a vertical shale-gas well,which determines working pressure,in the center of circular sealed bed is solved.And dimensionless productivity-decline curve is drawn through Stehfest numerical inversion.Result shows that(1) shale-gas well needs more time to reach pseudo steady-state flowing than conventional gas well,resulting in a long production cy... |
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| Keywords: | shale gas gas reservoir property seepage model productivity decline Langmuir law |
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