| 考虑煤自调节效应的煤层气藏物质平衡方程 |
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| 引用本文： | 胡素明,李相方.考虑煤自调节效应的煤层气藏物质平衡方程[J].天然气勘探与开发,2010,33(1):38-41. |
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| 作者姓名： | 胡素明 李相方 |
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| 作者单位： | 中国石油大学(北京)石油天然气工程学院 |
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| 摘 要： | 在研究煤层气藏的物质平衡时,必须考虑裂缝孔隙度的动态变化问题。在考虑自调节效应(即气体吸附到基质表面时,基质膨胀;气体从基质表面解吸时,基质收缩)对孔隙度变化影响的前提下,推导了煤层气藏的物质平衡方程,并通过实例分析发现,若忽略或忽视自调节效应,则运用物质平衡法预测的煤层气地质储量将比真实值偏小。
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| 关 键 词： | 煤层气 物质平衡 裂缝孔隙度 自调节 水侵 |
MATERIAL BALANCE EQUATION OF COAL-BED METHANE RESERVOIR WITH CONSIDERATION OF SELF-ADJUSTMENT EFFECT OF COAL |
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| HU Suming,LI Xiangfang.MATERIAL BALANCE EQUATION OF COAL-BED METHANE RESERVOIR WITH CONSIDERATION OF SELF-ADJUSTMENT EFFECT OF COAL[J].Natural Gas Exploration and Development,2010,33(1):38-41. |
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| Authors: | HU Suming LI Xiangfang |
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| Affiliation: | HU Suming , LI Xiangfang (Petroleum Engineering Faculty,China University of Petroleum-Beijing). |
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| Abstract: | Dynamic variation of fracture porosity should be taken into account when researching material balance of coal-bed methane (CBM). However, porosity reduction caused by depressurizing was only taken into consideration by previous study whereas its enlargement induced by desorption was neglected. Therefore, a new material balance equation has been derived for CBM reservoir. It is shown that the predicted reserves may be smaller than its true value if self-adjustment effect is neglected. |
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| Keywords: | coal-bed methane material balance dynamic analysis fracture porosity self-adjustment |
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