摘要
论文分析了冀南某井田研究区主要含煤地层的沉积特征和聚煤规律,通过钻井岩芯、测井资料等研究可知,该井田山西组主要以三角洲沉积体系为主,包括三角洲平原、三角洲前缘和前三角洲。通过沉积微相的划分,结合研究区内的钻孔资料,从沉积古环境和成煤条件等方面研究了该区煤层厚度变化的原因。结果表明:研究区山西组煤层稳定,煤层较厚,是在基准面相对较稳定,逐渐下降时期发生的浅水三角洲沉积形成的;在三角洲平原上泥炭沼泽广布,而且维持时间较长,形成本区厚度较大、分布稳定的2~#主采煤层。
In order to make the sedimentary system and coal accumulation Law of Shanxi formation of the study area clearly,by comprehensive study of drilling cores and logging data,Shanxi formation of the Coal Mine is mainly dominated deltaic depositional system,include Delta plain,delta front and delta.By classifying microfacies,combined with the borehole data of the study area,studies the reasons for the change of thickness of the coal seams of the region from ancient sedimentary environment and the coal-forming conditions.The results show that Shanxi Formation coal beds of the study area are comparatively stable and thick,they are formed because of shallow water delta deposition,which was happened in the period that the base level is relatively stable or gradually decreased.Peat swamps on the delta plain are widely distributed and maintain a longer time,forming the comparatively thick and distributed stably2#main coal seams.
作者
薛园园
邵长奎
XUE Yuan-yuan;SHAO Chang-kui(China University of Geosciences, Baoding, Hebei 071000;Geophysical Exploration Academy of China Metallurgical Geology Bureau, Baoding, Hebei 071051)
出处
《河北地质大学学报》
2017年第6期13-17,共5页
Journal of Hebei Geo University
关键词
冀南
山西组
沉积体系
煤层厚度
聚煤规律
southern Hebei
Shanxi formation
sedimentary system
coal seam thickness
coal accumulation law
