| 煤层气排采时渗透率动态特征研究 |
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| 引用本文： | 蔡振华,;廖新维,;杜志强,;张倩,;范希良.煤层气排采时渗透率动态特征研究[J].焦作工学院学报,2014(2):149-153. |
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| 作者姓名： | 蔡振华 ;廖新维 ;杜志强 ;张倩 ;范希良 |
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| 作者单位： | [1]海油发展工程技术公司,天津300450; [2]中国石油大学(北京)石油工程学院,北京102249; [3]中煤科工集团西安研究院煤层气所,西安710077; [4]中国石油新疆油田公司油藏评价处,新疆克拉玛依834000; [5]中国石油长庆油田公司,西安710077 |
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| 基金项目： | 国家自然科学基金资助项目（U1262101）;国家重大科技专项项目（2011ZX05016-006）. |
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| 摘 要： | 正确认识煤层气井开采过程中的渗透性变化特征是实现煤层气科学高效开发的重要前提.目前,大量的室内实验研究渗透率随排采的变化时仅考虑压力敏感性,而没有考虑在实际生产过程中存在的基质收缩效应的影响.笔者提出一种动态分析方法,利用实际生产数据,分段拟合出不同生产时间下的煤层参数,包括渗透率和地层压力等,并且在前人研究的基础上建立了考虑应力敏感效应和基质收缩效应的渗透率数学模型,通过数据回归获得到模型的具体参数.该方法可以用于描述煤层渗透率的动态特征,预测煤层气产量变化,指导现场配产.
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| 关 键 词： | 煤层气 应力敏感 基质收缩 动态渗透率 生产动态分析 |
Research method for dynamic permeability of coal bed methane reservoir |
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| Affiliation: | CAI Zhen-hua,LIAO Xin-wei,DU Zhi-qiang,ZHANG Qian, FAN Xi-liang(1.Cnooc Enertech-Drilling Production Co., Tianjin 300450, China;2.College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;3.Xi＇an Research Institute of China Coal Technology ＆ Engineering Group Corp ,Xi＇an 710077, China;4.Reservoir Evaluation Department, Xinjiang oilfield company, Petro China, Karamay 83400,Xinjiang, China;5.PetroChina Changqing oil company, Xi＇an 710077, China) |
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| Abstract: | Fully understanding the characteristic of a coal bed is a key to develop coal bed methane.The previous researchers only pay attention to its stress sensitivity,and rarely consider the matrix shrinkage.A new method is presented,in which the production data is utilized,and it can invert properties of a coal bed,including reservoir pressure and permeability.In addition,a mathematical model of permeability has been built by combining pervious researches.The model can be regressed by permeability versus reservoir pressure.This method can describe the performance of permeability,and predict gas rate to guide production assignment. |
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| Keywords: | coal bed methane stress sensitivity matrix shrinkage permeability performance production data analysis |
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