焦作煤田煤层气富集地质控制因素分析  

Analysis of CMB Enrichment Geological Control Factor in Jiaozuo Coalfield

作　　者：郑继荣[1] 张俊[1] 张苗苗[1] 

机构地区：[1]河南省地质矿产勘查开发局第二地质队,河南郑州450000

出　　处：《资源导刊（地球科技版）》2012年第5期37-41,共5页

摘　　要：焦作煤田煤层气的富集规律和可采性特征，受到构造、沉积、水文三大类地质因素的综合影响。其中含煤盆地构造演化历史控制了煤层气生成、运移、富集、赋存、开采地质条件等各个环节，尤其是中生代末的抬升剥蚀和断块的差异升降运动以及强烈褶皱运动，对煤层气的生成和富集程度、储层压力、渗透率产生重要影响；沉积特征直接决定了煤层顶板的岩性、厚度、稳定性和砂体展布方向，从而对煤层含气性的区域分异产生一定影响；水文地质条件对煤层气的保存条件具有直接影响，但其又受控于在构造演化历史控制之下的总体构造面貌。本次分析表明，影响焦作煤田煤层气富集和分布的主要因素体现在五个方面，即煤层埋深特别是基岩埋深、断裂构造、水文地质条件、煤层顶底板岩性的组合关系以及煤化程度。The enrichment regularity and workability of Jiaozuo coalfield are influenced by the structure, sedimentary, hydrology factors. Generation, migration, enrichment and occurrence as well as mining geological conditions are controlled by the coal contain basin tectonic evolution history, especially by the uplift and fault block lifting movement in the end of the Mesozoic era. The lithology, thickness, stability and sand body exhibition cloth direction, and the coal seam showings of regional differentiation are directly determined by the sedimentary characteristics. Hydrogeology conditions on the coal bed methane preservation conditions have direct effect, but it is also controlled by the overall structure look which under the control of te：tonic evolution history. The analysis shows that the major factors which influence of Jiaozuo coalfield CBM enrichment and distribution are： coal buried depth of bedrock, especially fracture, hydrology geology condition, the top floor rock seam the combination of the project, as well as the relations between the degrees.

关 键 词：基岩埋深 煤化程度 煤层气含量 焦作煤田 

分 类 号：P618.51[天文地球—矿床学]