贵州煤层气特点和排采技术  

FEATURES AND RECOVERY TECHNOLOGY OF COAL-BED GAS IN GUIZHOU

作　　者：谢炜[1,2] 贺婷[2] 杨明[2] 张利亚[3] 刘家霞[1] 

机构地区：[1]西南石油大学石油工程学院 [2]西南石油局井下作业公司 [3]重庆科技学院石油工程学院

出　　处：《钻采工艺》2011年第3期58-60,116,共3页Drilling & Production Technology

摘　　要：贵州素有"江南煤海"之称,具有储量大、煤种全、埋藏浅、分布聚、组合好的特点,煤层中还蕴藏有丰富的可供开发煤层气。该地区的煤层气以煤层为储基层,气源由煤层自身生成,主要以吸附态存在,它不像常规油气藏那样遵循重力分异原理。其不必受由高气势面构成的三维封闭的低气势而形成的圈闭的控制,只要有较好的盖层条件,能够维持相当的地层压力,使煤层能"吸附住"一定的气体,无论在储层(即煤层)的构造高部位还是低部位,都能形成气藏。但由于缺乏对煤层气开发技术的研究等原因,导致至今煤层气利用率并不高。文章以贵州某煤层气井为引并根据煤层气的赋存条件复杂、产出机理、物性或电性平衡等特点,结合操作经验,介绍了作业现场排采工艺的操作要领。There are abtundant coal-bed methane resources in coal bed of Guizhou.The coal-bed gas is taking coal -bed as subbase, it mainly absorbs in coal bed, its exploitation is very difficult because lack of the research on coal-bed gas production technology and its unique storage conditions in China, so, its utilization ratio is very low. Taking an example in Guizhou CBM wells, according to the complex storage condition, production mechanism, physical property or electric balance feature of coal-bed gas, and combined with operation experience, the field operation methods of coal-bed gas production were introduced.

关 键 词：煤层气 排采工艺 物性或电性平衡 

分 类 号：TD84[矿业工程—煤矿开采]