大佛寺井田煤层气井产能主控因素分析

Analysis on main controlling factors of coalbed methane wells productivity in Dafosi mine field

受煤层气开发时间、规模、地质条件、完井方式、排采方式与工作制度等方面的影响,煤层气井的生产效果往往会有较大的差别。彬长矿区大佛寺井田已实施的43口煤层气井中既有高产井,也有大量的低产井甚至不产气井。通过对大佛寺井田煤层气生产井资料统计对比分析,总结出影响煤层气井产气量的主要控制因素,如井型、构造、煤层含气量等,可为其他区块煤层气的开发提供借鉴。

Due to the influence of coalbed methane development time,scale,geological conditions,well completion mode,drainage mode and working system,the production effect of coalbed methane wells is often quite different.Among the 43 coalbed methane wells implemented in Dafosi mine field of Binchang mining area,there are not only high production wells,but also a large number of low-yield wells or even non production wells.Based on the statistics and comparative analysis of a large number of coalbed methane production well data in Dafosi mine field,this paper summarizes the main control factors affecting coalbed methane production,such as well type,structure,coalbed methane content,etc.,which can provide reference for the development of coalbed methane in other blocks.