宁夏中卫上下河沿油页岩矿床的主要特征及开发利用前景

油页岩是目前油气领域里新的研究热点,也是国家今后长期勘探开发的重点。前人及我们最近的研究结果表明,宁夏中卫上下河沿地区存在与煤伴生的油页岩资源。油页岩赋存于晚石炭世—早二叠世太原组之中。成矿环境为晚古生代奥拉谷构造背景条件下的浅海—海湾泻湖—三角洲环境。矿区构造较为复杂,总体为一向北推覆、推覆面南倾的区域性大型推覆构造。逆掩断层产状较陡,倾角达60°～75°,构成断层相关褶皱。油页岩呈层状,夹于煤系地层之中,受断层相关褶皱控制,产状与相关地层产状一致,总的呈一不对称的向斜构造。厚度及产状变化较大,一般厚度1m左右。油页岩一般为黑灰色,致密而细腻,具油质感,有沥青味,贝壳状断口,较坚硬,易破碎,风化后呈纸片状、薄片状,小刀刻之见明显的亮痕。含油率1.5～9.35%,低位发热量0.02 MJ/Kg～6.07 MJ/Kg。视比重一般1.79～2.57。具有工业价值的层位是油1和油3。查明油页岩资源量(121+333)400×104t,是开采炼油的理想地段。

Main Geological Characteristics of Shangxiaheyan Oil Shale Deposit, Zhongwei County, Hui Nationality Autonomous Region, Ningxia, West China and its Foreground on Dev-eloping and Prospecting

Oil shale is a new hot spot in oil-gas study and prospecting field,also a long term focal point in prospecting and developing of mineral resources of our nation in future.Previous and our recent study results show that there are some oil shale resources which was associated with coal layers(abbre.CL) in Shangxiaheyan area,Zhongwei County,Ningxia Hui Autonomous Region,West China.The oil shale formations(abbre.OSF) oc-cur in the Taiyuan Formation(Late Carboniferous-early Permian) and Yanghugou Formation(Middl...