Abstract: The developing situation of drilling and completion technology in coal-bed methane wells in last decade in our country is reviewed.The successful technology and the research results of coal-bed methane obtained in America are summurized.Some problems about existing technology and the main factors restricting coal-bed methane development in China are discussed in the view of drill and completion engineering.Some technique difficulties,the thoughts and relative measures for solving the problems in drilling and completion of coal-bed methane wells in China under the condition of coal-bed with low pressure,low permeability,gas saturated and other special physical properties are proposed.

Key words: coal-bed methane, drilling, completion, situation, measure

摘要： 对10多年来我国煤层气钻井完井技术状况进行了回顾,结合美国煤层气开发成功的技术和研究成果,从钻井完井工程的角度分析了我国现有技术存在的问题和制约煤层气开发效果的主要因素.提出了在我国煤层低压、特低渗透、气饱和等特殊物性条件下钻井完井过程中的技术难点、解决问题的思路和应采取的技术措施.

关键词: 中国, 煤层气, 钻井, 完井, 技术现状, 对策