煤层气开采技术探讨

摘要

Due to the special geological structures and the development of the coal, the coalbed methane(CBM) reservoir shows “three lows” properties, which are the low gas saturation, low permeability and low pressure. In this paper, we describe the storage form of the CBM and its reservoir characteristics, and also state the extraction of the CBM, the technology of well completion and the fracturing techniques used to increase the CBM recovery. Especially, we focus on more details of the various methods used in the well completion to the CBM and the fracturing designs and different techniques.%由于地质的内部结构和煤炭的生成环境，使得形成的煤层气的含气饱和度较低，并且内部的压力环境和石头成都都较小。文章介绍了煤层气储藏方式及不同的存储层的特征，并在此基础上探讨煤层气的开采技术，以及在开采过程中的关键技术要点，重点对煤层气完井种类和压裂技术做了详细介绍。