煤层割理在煤层气开发中的试验研究

详细信息

Experimental study on coal cleat in coalbed methane development

摘要: 根据煤层割理渗透率的各向异性,采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。测定研究表明:垂直面割理方向钻孔初始瓦斯抽放百米流量是平行面割理方向钻孔的1.2倍,衰减系数比平行面割理方向钻孔减少了53.7%。垂直面割理方向钻孔的抽放量在任何相应时期都大于平行面割理方向钻孔的抽放量。从而得出:垂直面割理方向钻孔抽放效果明显优于平行面割理方向钻孔,为探索提高煤层气抽放量找到了一条途径。
- 煤层气 /
- 煤层割理 /
- 抽放量
Abstract: This experiment bases on different permeability in different directions of coal seam cleats.To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted.It is confirmed that the initial methane drainage of 100 metre well in direction vertical to face cleat is 1.2 times than parallel direction, and the exhausting coefficient is reduced by 0.537.The methane drainage in vertical to face cleat is superior to parallel wells in all the times.From all the views of points, it is concluded that the methane drainage of wells in vertical direction to face cleat is much better than that of wells in parallel to face cleat.
- coalbed methane /
- coal cleat /
- drainage volume