| 煤层气─固界面作用与吸附模型 |
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| 引用本文： | 邓英尔,马宝岐,刘慈群.煤层气─固界面作用与吸附模型[J].煤田地质与勘探,2004,32(3):24-26. |
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| 作者姓名： | 邓英尔 马宝岐 刘慈群 |
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| 作者单位： | 1. 油气藏地质及开发工程国家重点实验室, 四川 成都 610059; |
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| 基金项目： | 国家 973项目 (编号 :2 0 0 2CB2 1170 0 )，国家自然科学基金项目 (面上项目,编号 :4 0 2 0 2 0 36 ) |
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| 摘 要： | 按照毛细管模型与单分子层作用模型, 推导了煤层气-固界面作用与煤层渗透性的关系;根据煤层气吸附实验资料, 运用非线性回归方法, 分别按Langmuir吸附理论和BET吸附理论计算了煤层气吸附规律。实例分析表明:煤层气-固界面作用的强弱与煤层介质的渗透率平方根或煤层介质的孔径大小成反比, 它揭示了低渗透煤层气解吸困难、开采难度较大的机理;BET吸附模型比Langmuir吸附模型能更好地描述煤层气的吸附规律。研究结果为煤层气开发工程提供了科学依据。
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| 关 键 词： | 煤层气 吸附 模型 解吸 机理 非线性回归 |
| 文章编号： | 1001-1986(2004)03-0024-03 |
| 收稿时间： | 2003-11-05 |
| 修稿时间： | 2003年11月5日 |
Interaction between coal-bed methane and coal and model for adsorption |
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| DENG Ying-er ,MA Bao-qi ,LIU Ci-qun.Interaction between coal-bed methane and coal and model for adsorption[J].Coal Geology & Exploration,2004,32(3):24-26. |
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| Authors: | DENG Ying-er MA Bao-qi LIU Ci-qun |
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| Institution: | 1. State key laboratory of Oil-Gas Reservoir Geclogy and Development, Chengdu University of Techndogy, Chengdu, 610059, China;2. School of Water Conservancy & Hydropower Eng., Sichuan University, Chengdu 610064, China;3. Institute of Oil Field Chemistry, Xi'an Petroleum University, Xi'an 710065, China;4. Porous Flow and Fluid Mechanics, Chinese Academia of Sciences, Langfang 065000, China |
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| Abstract: | A relationship between permeability of coal-bed and interaction of coal-bed methane and coal was derived according to a capillary model and a singular layer molecular model. Adsorption law of coal-bed methane was obtained by a nonlinear regression method based on experiment data of the adsorption, according to adsorption theories of Langmuir and BET respectively. An example was given and discussed. Results show that the interaction strength is inverse proportion to square root of permeability and pore radius of coal-bed, which suggested the mechanisms why desorption of the methane in low permeability coal is difficult and the methane is not easy to develop, as well as the BET model is better fit for adsorption of coal-bed methane than the Langmuir model. The results can provide coal-bed methane development engineering design with scientific basis. |
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| Keywords: | coalbed methane adsorption model desorption mechanism nonlinear regression |
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