准噶尔盆地南缘早侏罗世盆地原型及油气地质意义  

The Early Jurassic Prototype at the Southern Margin of Junggar Basin and its Implication to the Petroleum Geology

作　　者：魏彩茹[1] 王彦君[1] 李忠春[1] 马德龙 Wei Cairu;Wang Yanjun;Li Zhongchun;Ma Delong(Research institute of petroleum exploration and development-northwest,PetroChina,Lanzhou,Gansu,730020,China)

机构地区：[1]中国石油勘探开发研究院西北分院

出　　处：《新疆地质》2019年第4期516-519,共4页Xinjiang Geology

基　　金：国家科技重大专项(ZX201605003002)资助

摘　　要：前人研究认为准噶尔盆地南缘早侏罗世为弱伸展坳陷,最新研究通过地震沿层拉平恢复技术确定断陷盆地类型,结合地层厚度变化、不整合及沉积旋回特征,准确恢复了盆地原型,将盆地原型定为弱伸展断陷盆地。断陷盆地是烃源岩和储集层发育的重要时期。断陷根部发育类型较好的烃源岩,斜坡区及盆地以外地区水体浅,易沼泽化对烃源岩的影响较大,因此,中等至好质量烃源岩比例不高。断陷盆地对油气成藏有明显控制作用,是油气成藏的有利区。先期拉张构造与晚期挤压背斜垂向叠置,下源上圈,垂向疏导,有利成藏。Previous studies have suggested that the early Jurassic in the southern margin of the Junggar basin is a weakly extensional depression.In the latest study,the fault depression basin type was determined by the seismic leveling recovery technique along the strata,and the basin prototype was accurately recovered by combining with the variation of stratum thickness,unconformity and sedimentary cycle characteristics,and the basin prototype was characterized as a weakly extensional fault depression basin.The fault-depression is important for the development of the source and reservoir,the source rock is much better at the foot of the fault-depression than other area far away from the fault,and it also has great control to the accumulation of oil and gas.The early fault-depression which was imposed by later thrust-fold belt has great importance to the petroleum exploration.

关 键 词：准噶尔盆地南缘 早侏罗世 断陷盆地 烃源岩 储集层 有利成藏 

分 类 号：P534.52[天文地球—古生物学与地层学] P618.13[天文地球—地质学]