河南胡襄煤田煤层赋存特征及控气因素  

Coal-seam existence characteristic and control factors of CBM in Huxiang coalmine of Henan province

作　　者：李文前[1] 王昆[1] 许亚坤[1] 冯斌[1] 

机构地区：[1]河南省地质矿产勘查开发局第四地质矿产调查院,河南商丘476000

出　　处：《河南理工大学学报（自然科学版）》2014年第1期39-44,共6页Journal of Henan Polytechnic University（Natural Science）

摘　　要：以河南胡襄煤田为研究区,通过定性分析和定量研究,探讨了煤层厚度、煤层埋深、上覆基岩厚度、地质构造、顶底板岩性以及变质程度等因素对煤层气富集的控制作用.通过数理统计方法,得出了煤层厚度、埋深、上覆基岩厚度与煤层含气量的回归方程,并进行了显著性检验.研究结果表明,随着煤层厚度的增加,含气量有着增大的趋势,两者之间具有线性正相关关系;随着埋深和上覆基岩厚度的增加,含气量都有着先快速增大而后缓慢增大的趋势,且具有对数正相关关系;煤变质程度是二1煤层和二2煤层含气量变化的影响因素之一,且含气量随Ro,max的增加而增大;次级褶曲向斜翼部和背斜轴部富气,且向抬升区域运移;断层或煤层露头线附近,含气量较小;断层的上升盘含气量明显小于下降盘;断层尖灭端附近,含气量大;煤层顶底板岩性对含气量有一定的影响.Used qualitative and quantitative analyses,the influences of the factors such as thickness,burial depth and thickness of overlying bedrock,geology structures,lithology of the roof and floor rocks,and metamorphism on CBM enrichment has been discussed.By the mathematical statistics,the regression equations about the relationship among the thickness,the burial depth,the thickness of overlying bedrock and CBM-content had been gained and the test of significance of the equations was done.The results show that：（1） with the increase of seam thickness,CBM-content increases in a linearity; （2） the relationship among burial depth,the thickness of overlying bedrock and CBM-content is a positive correlation in a logarithm; （3） with the increase of Ro,max,CBM-content of Ⅰ 1 and Ⅱ 2 coal-seam also increase; （4） CBM enrich at the alar part of syncline and axis of anticline and migrate to the lifting regions; nearby the faults and the outcrop of a coal seam,CBM-content is low; gas content in the up-thrown side of a fault is lower than that in a down-thrown side; gas content at the vanishing end of faults is high ; （5） the lithology of the roof and the floor rocks has a certain influence on CBM-content.

关 键 词：胡襄煤田 煤层气 赋存特征 

分 类 号：P618.11[天文地球—矿床学]