民和盆地侏罗系地层划分与对比  

THE SUBDIVISION AND CORRELATION OF THE JURASSIC SYSTEM OF THE MINHE BASIN

作　　者：张虎权[1] 王廷栋[2] 阎存凤[2] 袁剑英[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]西南石油学院,四川成都610500

出　　处：《地层学杂志》2007年第1期62-67,共6页Journal of Stratigraphy

基　　金：中国石油天然气股份有限公司吐哈油田分公司"民和盆地资源潜力及远景评价"(2002)项目

摘　　要：民和盆地是一个油、煤、气伴生的中新生代陆相盆地,侏罗系地层层序自下而上划分为下侏罗统炭洞沟组(大西沟组)、中侏罗统窑街组、红沟组、上侏罗统享堂组。中侏罗世早、中期气候温暖湿润,形成了以沼泽相煤系地层和湖相暗色泥岩、油页岩为主的生油建造,晚侏罗世至白垩纪气候较为干燥,形成了以河流相为主的砂砾岩储集建造。根据古生物、岩性、电性、含煤性、构造、古气候等地层划分对比标志,重新确立了盆地的地层系统,建立了盆地中新生界地层标准剖面,为盆地石油勘探奠定了坚实的基础。The Minhe Basin contains abundant oil, coal and natural gas resources. The Jurassic System in the Minhe Basin includes the Lower Jurassic Tandonggou （Daxigou） Formation, the Middle Jurassic Yaojie and Honggou formations, and the Upper Jurassic Xiangtang Formation. The early-middle Middle Jurassic is characterized by warm and wet paleoclimate and swamp facies, where major source rocks such as coals, organic-rich lacustrine mudstone, and oil-shale were formed. The Late Jurassic to Cretaceous is characterized by drier paleoclimate and consists of fluvial sandstones that are major reservoir rocks. The stratigraphy system of the Minhe Basin is revised on the basis of new biostratigraphic and lithostratigraphic data, as well as electric log, coal seams, tectonic, and paleoclimatic data. Type sections for the Mesozoic and Cenozoic stratigraphic system in the Minhe Basin have been established, forming a solid foundation for petroleum exploration in the Minhe Basin.

关 键 词：侏罗系 古生物 古气候 划分 对比 民和盆地 甘肃 青海 

分 类 号：P534.52[天文地球—古生物学与地层学]