伊川县柳庄勘查区山西组沉积环境及聚煤规律研究

Study on Sedimentary Environment and Coal Accumulation Law of Shanxi Formation in Liuzhuang Exploration Area, Yichuan County

二叠系山西组是研究区最主要的产煤地层,通过对钻孔岩心的观察描述、煤质的分析,煤岩层厚度的统计,对山西组的沉积环境及聚煤规律进行了研究,将山西组划分为四个岩性段,主要发育潮坪相、泻湖相、三角洲平原3种沉积相,二1煤层形成于复水较深的泥潭沼泽还原环境,聚煤中心位于勘查区西部(0007-0703孔)和东部(2 704孔)一带。

The Permian Shanxi Formation is the main coal-producing stratum in the study area.Based on the observation and description of drill cores,the analysis of coal quality,and the statistics of coal bed thickness,the sedimentary environment and coal accumulation rule of Shanxi Formation are studied.The Shanxi Formation is divided into four lithologic sections,mainly developing three sedimentary facies:tidal flat facies,lagoon facies,and delta plain.Coal seam II 1 is formed in a deep-water recovery swamp reduction environment,the coal accumulation center is located in the west(hole 0703-0007)and east(hole 2704)of the exploration area.