【摘要】 煤层含气性是煤层气资源评价的的重要参数。豫西地区石炭系二叠系煤层发育,本文依据大量的煤田地质资料和含气量测试、瓦斯涌出量等数据,分析了含气量测试数据的可信度,深入解剖了煤变质程度、埋深、构造、上覆连续沉积地层厚度、煤层厚度及煤层顶底板岩性等主要控制因素对煤层含气性的影响,进而建立了煤层含气量与煤级、埋深的拟合曲线及其函数关系,并对全区二₁煤层含气量空间分布规律进行了总结,得出了本区煤层含气量高、煤层气勘探开发前景十分广阔的结论。更多还原

【Abstract】 The gas content of the coalbed is one of important parameters for assessing coalbed methane resources. There is rich coal in the Carbonaceous -Permian of western Henan. Based on the coal geology i gas content measurements, gas emission and other data, this paper analyzes the reliability of gas content measurement and the influences of the ranks of coal metamorphism, coal burial depth, structure, thickness of overlying continuous deposits, thickness of coal and lithologic characters of the hanging wall and foot wall of the coalbed on the gas content of the coalbed. Then the curves fitting the relationships of the gas content with the rank of coal metamorphism and depth as well as their functional relationships are established and the characteristics of the spatial distribution of the gas content of a coalbed are summarized. Finally, the authors conclude that the gas content of the coalbed is high and the prospects of exploiting coalbed methane are very bright.更多还原