摘要
老黑山盆地蕴含丰富的煤炭和油页岩资源,下白垩统穆棱组上部含煤段发育8层油页岩和12层煤,二者常以互层的方式出现。通过沉积相分析,发现穆棱组煤发育在湖沼环境,油页岩发育在浅湖环境。穆棱组划分为4个三级层序,其中三级层序Ⅰ、Ⅱ、Ⅲ内发育完整的4个体系域,在层序Ⅲ的水进和高水位体系域中发育有煤和油页岩沉积,油页岩为准层序的底部,向上水体逐渐变浅沉积有较厚煤层。通过对钻孔岩心进行系统取样,通过工业分析、低温干馏等测试发现,煤与油页岩差异较明显,煤具有高的含油率(平均10.29%)、高发热量(平均20.33MJ/kg)和低灰分(平均31.08%)的品质特征,油页岩多为中等含油率(平均6.23%)、中高发热量(平均11.51 MJ/kg)和中低灰分(平均61.32%)的品质特征,油页岩与煤相比工业品质偏低,且厚度较薄,单独开发不具备资源潜力。
The Laoheishan Basin has abundant coal and oil shale resources.In upper part of the Lower Cretaceous Muling Formation have developed 8 oil shale layers and 12 coal seams,the two are commonly presented in alternating beds.Through sedimentary facies analysis has found that the Muling Formation coal developed in a limnetic environment,while oil shale in shallow lacustrine environment.Muling Formation can be subdivided into 4 tertiary sequences,among them,in the sequencesⅠ,ⅡandⅢhave developed complete 4 systems tracks,in the sequenceⅢtransgression and highstand system tract developed coal and oil shale deposits,oil shale at the bottom of quasi-sequence,upward,water body gradually shallower and deposited thicker coal seams.Through drilling core systematic sampling,after proximate analysis,low temperature pyrolysis test have found obvious differences between coal and oil shale.Coal has quality features of high oil content(average 10.29%),high calorific value(average 20.33 MJ/kg)and low ash content(average 31.08%);oil shale has quality features of mostly medium oil content(average 6.23%),medium-high calorific value(average11.51 MJ/kg)and medium-low ash content(average 61.32%),Comparing with coal,oil shale has low industrial quality,thickness thinner,without separate exploitation resource potential.
作者
徐银波
王君贤
刘招君
孟庆涛
宋宇
张家强
李锋
Xu Yinbo;Wang Junxian;Liu Zhaojun;Meng Qingtao;Song Yu;Zhang Jiaqiang;i Feng(Oil and Gas Survey,China Geological Survey,Beijing 100083;The Key Laboratory of Unconventional Oil and Gas Geology,CGS,Beijing 100083;College of Earth Sciences,Jilin University,Changchun,Jilin 130061;Key Laboratory of Oil Shale and Coexisting Minerals in Jilin Province,Changchun,Jilin 130061;School of Earth Resources,China University of Geosciences,Wuhan,Hubei 430074)
出处
《中国煤炭地质》
2019年第10期27-32,58,共7页
Coal Geology of China
基金
中国地质调查局项目(DD20189606、DD20160188)
国土资源部全国油气资源战略选区调查项目(1211302108025-3)
国家自然基金(41772092)
关键词
油页岩
煤
工业品质
沉积环境
共生特征
oil shale
coal
industrial quality
sedimentary environment
paragenetic features
