煤层气排采动态的被动式超低频频谱分析

摘要

Exploration and development of the coal-bed methane (CBM) is very important to economics, environment and society. It is a key factor to trace and assess the process of the coal-bed gas mining dynamically for its efficient development. In the present article, based on the theory of natural resources super low frequency (SLF) electromagnetic detecting, the method that uses the SLF to trace the coal-bed gas mining dynamic is introduced. The field tests in 2007 and 2010 in the QIN-Shui basin,Shanxi province of China indicate that this method is efficient for the dynamic of the coal-bed gas mining.%煤层气的勘探与开发具有很强的经济意义、环境意义以及社会效益.煤层气排采过程动态监测与准确评估是煤层气高效开发的关键.文章从煤层气排采动态的天然源超低频电磁探测原理出发,采用北京大学超低频电磁探测仪器,通过分析煤层气排采过程中不同时间段的超低频电磁探测频谱,揭示煤层气排采的动态变化.山西沁水盆地实际探测结果表明:被动式超低频电磁探测技术能够简单、有效、尤损伤的探测煤层气排采动态.