甜水河勘查区富油煤煤岩煤质及成煤环境

Coal-Rock Coal Quality and Coal-forming Environment of Tar-rich Coal in Tianshuihe Exploration Area

为提升国内油气自主保障能力,实现煤炭清洁高效利用,以大量煤田地质勘探和煤质分析资料为基础,对宁东煤田甜水河勘查区富油煤的煤岩煤质进行系统研究,结合煤层显微组分、硫分、煤灰成分对研究区富油煤成煤环境进行探讨。结果表明,甜水河勘查区各煤层焦油产率8.63%~9.87%,整体富油性较好,以富油煤为主。有机显微组分以镜质组为主,惰质组次之,壳质组少量,为中水分、低灰-中灰、中高挥发分、低硫-中低硫、中等煤化程度烟煤。研究区各煤层形成于温暖潮湿的古气候条件,成煤时水动力条件较弱、覆水较深,泥炭沼泽还原性较强。

In order to improve the domestic oil and gas independent guarantee capacity,to achieve clean and efficient utilization of coal,based on a large number of coal geological exploration and coal quality analysis data,the coal rock coal quality of tar-rich coal in the Tianshuihe exploration area of Ningdong coal field was systematically studied,and the coal-rich coal-forming environment of tar-rich coal in the study area was studied and discussed by combining the microscopic components,sulfur and coal ash components of the coal seam.The results show that the average tar yield of each coal seam in the Tianshuihe exploration area is 8.63%~9.87%,and the over all tar richness is good,mainly tar-rich coal.The organic microscopic components were mainly vitrinous group,followed by inert group,and a small amount of chitin group,which was medium moisture,low ash~medium gray,medium and high volatile content,low sulfur-medium and low sulfur,medium coal degree bituminous coal.The coal seams in the study area were formed under warm and humid paleoclimatic conditions,and the hydrodynamic conditions were weak and the water cover was deep during coal formation,and the reduction ability of peat bogs was strong.