正明井田煤层气井排采效果分析
Producing Efficiency of Coalbed Methane Well in Zhengming Minefield
田庆玲1
作者信息
- 1. 煤与煤层气共采国家重点实验室,山西 晋城 048012
- 折叠
摘要
左权县正明井田为高瓦斯矿井,严重制约着煤矿的安全高效开采.通过分析正明井田煤层气地质条件,对比已投运的 28 口煤层气地面预抽井 4 种排采方式的生产效果,得出以下结论:正明井田 7-10#煤层适合合层排采;15#煤层适合单层排采,而 15#煤层直接顶板为砂岩,煤层气赋存能力差,形成逸散,使得 15#煤层排采效果不及7-10#煤层;本井田灰岩不适于参与煤层的合层排采.
Abstract
Zuoquan Zhengming minefield is a gas-rich mine,which seriously restricts the safe and efficient mining of the coal mine.Based on the analysis of coalbed methane geological conditions in Zhengming minefield,this paper compared the production effects of four drainage methods of 28 surface pre-pumping wells that have been put into operation,and drawed the following conclusions:7-10#coal seam in Zhengming minefield is suitable for co-drainage.15#coal seam is suitable for single-layer drainage.The direct roof of 15#coal seam is sandstone,which cause the loose of coalbed gas,forming a low-gas coal seam.As the result,the gas producing efficiency of 15#coal seam is not as good as that of 7-10#coal seam.The limestone in Zhengming minefield is not suitable to participate in the co-drainage of coal seams.
关键词
正明井田/煤层气/单层排采/合层排采Key words
Zhengming minefield/coalbed methane/single-layer drainage/co-drainage引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据