屯兰煤矿煤层气成藏地质影响因素分析
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摘要
为了研究煤层气成藏的地质影响因素,本文以屯兰煤矿2#、8#和9#煤层为研究背景,分析了煤层顶底板岩性及厚度、煤层厚度、埋深、煤层变质程度、区域构造等与煤层气成藏之间的关系。得出储层气含量与煤层顶底板厚度不具有明显的相关性;与煤层厚度呈正相关,与煤中灰分、挥发分和水分含量呈负相关。煤层气成藏主要受煤化作用、构造特征、储层埋藏深度和煤层厚度影响,是多种影响因素综合作用的结果。
In order to study the geological influencing factors of coalbed methane accumulation, this paper analyzes the lithology and thickness of coal seam roof, coal seam thickness, buried depth, coal seam metamorphism degree and area by using 2#, 8# and 9# coal seams in Yulan Coal Mine as background. The relationship between structure and coalbed methane accumulation. It is concluded that the reservoir gas content does not have a significant correlation with the thickness of the coal seam roof and floor; it is positively correlated with the coal seam thickness and negatively correlated with the coal ash, volatile matter and moisture content. Coalbed methane accumulation is mainly affected by coalification, structural characteristics, reservoir burial depth and coal seam thickness, which is the result of a combination of various influencing factors.
In order to study the geological influencing factors of coalbed methane accumulation, this paper analyzes the lithology and thickness of coal seam roof, coal seam thickness, buried depth, coal seam metamorphism degree and area by using 2#, 8# and 9# coal seams in Yulan Coal Mine as background. The relationship between structure and coalbed methane accumulation. It is concluded that the reservoir gas content does not have a significant correlation with the thickness of the coal seam roof and floor; it is positively correlated with the coal seam thickness and negatively correlated with the coal ash, volatile matter and moisture content. Coalbed methane accumulation is mainly affected by coalification, structural characteristics, reservoir burial depth and coal seam thickness, which is the result of a combination of various influencing factors.
引文
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