| 倾斜煤层中不同倾向多分支井产能预测模型 |
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| 引用本文： | 孟伟东,王延斌,李玉魁,王志华.倾斜煤层中不同倾向多分支井产能预测模型[J].煤田地质与勘探,2008,36(3):27-30. |
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| 作者姓名： | 孟伟东 王延斌 李玉魁 王志华 |
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| 作者单位： | 1. 中国矿业大学资源与安全工程学院, 北京 100083; |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 煤层气分支井产能预测对区块优选、经济评价和排采生产管理等都具有重要的指导意义。根据多分支井在倾斜煤层不同钻进方式引起的分支井段及末端压降特点,回避煤层气从基质、裂隙系统运移的复杂过程,结合达西定律,分别建立了下倾钻进和上覆钻进两种方式下分支井段内与末端的压降模型、解吸半径模型和产气量预测模型。计算结果表明:这些模型能较准确地预测多分支井产能趋势,且方法简便、快捷,对现场排采工作制度具有一定指导作用。
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| 关 键 词： | 多分支井 倾斜煤层 煤层气 预测模型 |
| 文章编号： | 1001-1986(2008)03-0027-04 |
| 收稿时间： | 2007-10-26 |
| 修稿时间： | 2007年10月26 |
The production forecasting model about multi-branch wells in inclined seam in different tendencies |
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| MENG Wei-dong,WANG Yan-bin,LI Yu-kui,WANG Zhi-hua.The production forecasting model about multi-branch wells in inclined seam in different tendencies[J].Coal Geology & Exploration,2008,36(3):27-30. |
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| Authors: | MENG Wei-dong WANG Yan-bin LI Yu-kui WANG Zhi-hua |
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| Institution: | 1. School of Resource and Safety Engineering, China University of Mining and Technology, Beijing 100083, China;2. Orion Energy International Inc, Beijing 100080, China |
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| Abstract: | The production forecasting about CBM multilateral wells is of guiding significance in many sides such as optimized blocks,economic evaluation and drainage management and so on.Based on dropping pressure char-acteristics about multilateral wells from the multi-branch and the end of the branch in inclining seam in different drilling ways,avoiding complicatedly moving process of CBM from the matrix and cranny,combined with Darcy laws,some models such as dropping of pressure model,desorption radius model and production forecasting model about multi-branch and the end of the branch in two drilling ways along the declining and ascending seams were established.Results showed the preferable applied prospect. |
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| Keywords: | multilateral wells inclined seam CBM forecasting model |
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