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| 煤层气多分支水平井分支间距优化研究 | |
| 引用本文： | 李晓益.煤层气多分支水平井分支间距优化研究[J].科学技术与工程,2012,12(8):1885-1888. |
| 作者姓名： | 李晓益 |
| 作者单位： | 1. 中国石油大学(北京)教育部石油工程重点实验室,北京,102249 2. 中联煤层气有限责任公司,北京,100011 3. 中国石油集团钻井工程技术研究院,北京,100097 |
| 基金项目： | 国家科技重大专项研究项目（2011ZX05037） |
| 摘 要： | 建立了非均质双孔介质煤层气储层多分支水平井开采的数学模型，模型中考虑了裂缝中气体的扩散和主支、分支井筒内压降的影响，分析了煤层气多分支水平井分支间距对产能的影响。研究表明：采用多分支水平井开采煤层气储藏时，给定井身结构条件下，存在最优分支间距，当分支间距小于最优分支间距时，实际控制面积小，峰值产气量和累计产气量小；当分支间距大于最优分支间距时，累计产气量降低，相同控制面积下采出程度降低；现场开采煤层气储层时，当最优分支间距较小时，相对而言实际控制区域内煤层气采出程度更高；本文计算条件下，煤层气多分支水平井最优分支间距为200-300m。 |
| 关 键 词： | 煤层气 多分支水平井 最优分支间距 |
| 收稿时间： | 1/4/2012 2:57:42 PM |
| 修稿时间： | 1/4/2012 2:57:42 PM |
Optimization of Branch Spacing for Multi-lateral Horizontal well in CBM reservoirs |
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| lixiaoyi.Optimization of Branch Spacing for Multi-lateral Horizontal well in CBM reservoirs[J].Science Technology and Engineering,2012,12(8):1885-1888. | |
| Authors: | lixiaoyi |
| Institution: | 3 (MOE Key Laboratory of Petroleum Engineering,China University of Petroleum1,Beijing 102249,P.R.China; China United Coalbed Methane Co.,Ltd2.,Beijing 100011,P.R.China; Drilling Technology Research Institute,CNPC3,Beijing 100097,P.R.China) |
| Abstract: | A mathematical model of multi-lateral horizontal well for coalbed methane reservoirs is developed.The friction and acceleration loss in wellbore are considering in this modle,the influence of branch spacing to production behaviors was analysed.Research shows that: a optimal branch spacing affecting the multi-lateral horizontal well’ production behaviors exists,when the branch spacing is less than the optimal branch spacing.The actual control area is small,the peak gas production and cumulative gas production is small.When the branch spacing is more than the optimal branch spacing,the total gas production reduces,the recovery rate reduces under the same control area.The optimal branch spacing is 200—300 m in the computational conditions. |
| Keywords: | Coalbed methane multi-lateral horizontal well optimal branch spacing |
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