摘要
以南方早古生代海相页岩和华北石炭–二叠纪陆相(包括海陆交互相)页岩为研究对象,以场发射扫描电镜微观观测和相关物化测试结果为基础资料,重点对页岩的矿物成因、显微组分、有机质孔隙、岩石力学性质等进行对比性研究。结果表明:海相页岩与陆相页岩有异有同;海相页岩的基本特征是自生矿物多于陆源碎屑,自生石英含量丰富且与有机质同源分异,交互共生,显微组分是以低等生物为原始质料的沥青质体,且纳米级孔隙发育较好;陆相页岩的基本特征是陆源碎屑和泥质为主,自生矿物含量少,显微组分主要是以高等植物为原始质料的各种有机碎屑体,有机质纳米孔隙不发育。这些基本特征导致海相页岩和陆相页岩的生烃潜力、储层物性、岩石可压裂性等均有明显差异,页岩气资源评价与勘探开发需要区别对待。
Taking the Lower Paleozoic marine shale in south China and the Carboniferous-Permian continental shale in North China as the research object,based on microscopic observations of field emission scanning electron microscope(FESEM)and related physical chemical testing,the comparative study on the mineral genesis,the maceral,organic pore and rock mechanical properties of shale is emphasized.The results show:there are differences and similarities between marine shale and continental shale.The basic feature of marine shale is that there are more authigenic minerals than terrigenous clast,the authigenic quartz is rich and homologous,differentiated and symbiotic with organic matter,the macerals are bituminite from lower organisms as raw materials,and nanoscale pores are well developed.The basic feature of continental shale is that there are mainly terrigenous clast and mud,less authigenic mineral content,the macerals are mainly organic clasts from higher plants as raw materials,and organic nanopores are not developed.These basic characteristics lead to significant differences in hydrocarbon generation potential,reservoir properties and fracturing properties of marine shale and continental shale.Shale gas resources evaluation and exploration and development need to be treated differently.
作者
张慧
林伯伟
卞建玲
吴静
杨庆龙
袁立颖
ZHANG Hui;LIN Bowei;BIAN Jianling;WU Jing;YANG Qinglong;YUAN Liying(Xi’an Research Institute Co.Ltd.,China Coal Technology&Engineering Group Corp.,Xi’an 710077,China;SGS-CSTC Standards Technical Services Co.,Ltd./Minerals Services,Beijing 100176,China;Beijng China-Power Information Techology Co.Ltd.,Beijng 100192,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2018年第6期88-95,共8页
Coal Geology & Exploration
