中文摘要：

井径扩大对高效开发煤层气具有重要的控制作用.依据测井曲线视电阻率值的相对大小,划分出了潘庄区块部分煤层气井对应的硬煤和软煤,并对软煤所占百分比进行统计,展现区块内软煤比率的空间展布规律.应用线性回归方法,对比分析煤层倾角、岩体强度因子、软煤比例及软煤厚度对井径扩大的影响,得出软煤比例与井径扩大的关系最为密切,岩体强度因子及软煤厚度与井径扩大具有一定的相关性,煤层倾角对井径扩大基本上无影响,为高效开发煤层气奠定了坚实的基础.

英文摘要：

Borehole enlargement of the efficient development of CBM has an important controlling role. This paper based on the value of apparent resistivity log curve relative size, carves out of the block part of the CBM wells Pan- zhuang corresponding hard coal and soft coal. Soft coal and the percentage of a statistical, show the spatial distribu- tion law of the soft coal ratio within a block. Linear regression analysis reveales that angle of coal seam, rock mass strength factor, the proportion of soft coal and soft coal thickness of hole enlargement and concludes the proportion of soft coal and hole enlargement, most closely related to the rock intensity factor and soft coal thickness and hole enlargement has some relevance, seam dip angle of the hole enlargement is basically no effect. It has laid a solid foundation for the efficient development of CBM.