古城矿区富油煤赋存特征及主控因素分析  

Occurrence Characteristics and Main Controlling Factors Analysis of Oil-rich Coal in Gucheng Mining Area

作　　者：贺丹 杨甫 马丽 付德亮 张丽维 HE Dan;YANG Fu;MA Li;FU Deliang;ZHANG Liwei(Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Natural and Resources,Xi′an 710026,China;Shaanxi Provincial Coal Geology Group Co.,Ltd.,Xi′an 710026,China;School of Electrical Engineering,Xi′an Jiaotong University,Xi′an 710049,China;Xi′an University of Science and Technology,Xi′an 710054,China)

机构地区：[1]自然资源部煤炭资源勘查与综合利用重点实验室,西安710026 [2]陕西省煤田地质集团有限公司,西安710026 [3]西安交通大学电气工程学院,西安710049 [4]西安科技大学,西安710054

出　　处：《煤炭技术》2024年第2期97-103,共7页Coal Technology

基　　金：自然资源部煤炭资源勘查与综合利用重点实验室课题(SMDZ-2019ZD-1);陕西省创新能力支撑计划项目(2022KJXX-24)。

摘　　要：以前期煤田勘查成果为基础,选取4^(#)、8^(#)和9^(-1#)煤为研究对象,通过原煤焦油产率分级划分,研究了各煤层的富油煤赋存特征;从镜惰比(V/I)、H/C原子比、挥发分产率及灰成分指数等方面,探讨了富油煤的时空分布规律及主控因素。结果表明:各煤层焦油产率主要分布在9.02%~11.43%;平面上,4^(#)、8^(#)煤多为富油煤,高油煤零星分布;9^(-1#)煤以富油煤为主,局部分布高油煤;垂向上,自上而下煤层焦油产率呈增大趋势。煤层焦油产率与挥发分产率、氢元素含量均呈正相关,与灰分产率负相关,与灰成分中CaO含量呈弱正相关。煤层镜质体反射率为0.723%~0.733%,变质程度中等,生油潜力较大,含腐泥型母质为生油提供了物质基础,温暖、潮湿的气候环境和较深覆水或闭塞条件下的还原环境有利于富油煤形成。Based on previous coalfield exploration results,No.4,No.8 and No.9^(-1) coal were selected as the research object,and the occurrence characteristics of oil-rich coal in each coal seam were studied through classification of raw coal tar yield.The temporal and spatial distribution of oil-rich coal and its main controlling factors are discussed from the mirror inertia ratio(V/I),H/C atomic ratio,volatile yield and ash component index.The results show that:the tar yield of each coal seam mainly ranges from 9.02%to 11.43%.On the plane,No.4 and No.8 coals are mostly oil-rich coal,high-oil coal scattered distribution;No.9^(-1) coal is mainly oil-rich coal,and local distribution of high oil coal.The tar yield of coal seam increases from vertical to top.The tar yield of coal seam has positive correlation with volatile yield and hydrogen content,negative correlation with ash yield,and weak positive correlation with CaO content in ash composition.The vitrinite reflectance of coal seam is 0.723%-0.733%,with medium metamorphism and great potential oil generation,and sapropelic parent material provides material basis for oil generation.The warm and humid climate environment and deep water covered or blocked reduction environment are conducive to the formation of oil-rich coal.

关 键 词：古城矿区 富油煤 焦油产率 赋存特征 主控因素 

分 类 号：P618.1[天文地球—矿床学]