| 天然气水合物固定井压开采过程数值模拟 |
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| 引用本文： | 左林,由长福. 天然气水合物固定井压开采过程数值模拟[J]. 清华大学学报(自然科学版), 2008, 48(11) |
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| 作者姓名： | 左林 由长福 |
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| 作者单位： | 清华大学,热能工程系,北京,100084;清华大学,热能工程系,北京,100084 |
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| 摘 要： | 采用数值模拟方法研究天然气水合物在压降条件下的开采过程.在井压固定的前提下,建立了轴对称结构下的物理与数学模型.通过计算获得了储藏层中的天然气水合物在不同环境条件下的温度、压力、分解锋面与井间距离,以及以时间为函数的产气率.计算结果表明:天然气水合物的分解程度对井压、储藏层温度的变化十分敏感;大范围的分解并不会带来产气率的大幅度提高;较高的储藏层温度、较低的井压将增大产量;产气率随时间缓慢降低.
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| 关 键 词： | 天然气水合物 固定井压 分解 数值模拟 轴对称模型 |
Numerical simulation of natural gas hydrate production from a well at constant pressure |
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| ZUO Lin,YOU Changfu. Numerical simulation of natural gas hydrate production from a well at constant pressure[J]. Journal of Tsinghua University(Science and Technology), 2008, 48(11) |
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| Authors: | ZUO Lin YOU Changfu |
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| Affiliation: | ZUO Lin,YOU Changfu(Department of Thermal Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Natural gas production from an isolated hydrate reservoir by depressing was numerically simulated using an axis-symmetric model to calculate the temperature distribution,the pressure distribution,the dissocial front,and the gas production rate of a well at constant pressure for various conditions.The results indicate that the natural gas hydrate dissociation process is sensitive to the well pressure and the reservoir temperature and that a large scale of dissociation cannot result in a large increment of pr... |
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| Keywords: | natural gas hydrate constant pressure dissociation numerical simulation axis-symmetric model |
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