中亚北乌斯丘尔特盆地油气富集规律与勘探潜力  

Hydrocarbon accumulation rules and exploration potential in the North Ustyurt Basin

作　　者：余一欣[1,2] 殷进垠[3] 郑俊章[4] 李锋[5] 徐小龙[1,2] 吴航[1,2] 于笑[2] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国石化石油勘探开发研究院,北京100083 [4]中国石油勘探开发研究院,北京100083 [5]中国地质调查局油气资源调查中心,北京100029

出　　处：《石油与天然气地质》2016年第3期381-386,共6页Oil & Gas Geology

基　　金：国家自然科学基金项目(41472117;41125010);国家科技重大专项(2011ZX05031-001;2011ZX05029-002)

摘　　要：根据北乌斯丘尔特盆地主要地质特征及已发现油气田的分布特点,总结了油气富集规律及其主控因素,并分析了勘探潜力。受油气来源及烃源岩沉积环境差异的影响,北乌斯丘尔特盆地的油气分布具有"西油东气"的特点,而且优质储层的发育决定了石油和天然气分别富集于中侏罗统和始新统储层中,良好的运移通道则是北布扎奇隆起油田形成的重要条件。北布扎奇隆起中生界的勘探目标主要是发育于隆起北坡及顶部的拉长型断背斜构造,古生界巴什基尔阶和阿赛尔阶碳酸盐岩储层的勘探潜力也不容忽视。盆地中部和东部地区的侏罗系和始新统储层潜力较有限,但东北部的下白垩统可能是一个新的勘探层系,东南部石炭系维宪阶碳酸盐岩储层在局部地区也具有一定潜力。Based on the integrated analysis of key geological features and distribution of oil and gas fields in the North Ustyurt Basin, central Asia, this paper focuses mainly on hydrocarbon accumulation rules, their controlling factors, and ex- ploration potential in the basin. Because hydrocarbons are originated from multiple source rocks and depositional settings of source rocks vary, hydrocarbon distribution in the North Ustyurt Basin is characterized by ＇oil accumulations in the west and gas in the east＇. Oil and gas accumulated respectively in the middle Jurassic and Eocene reservoirs with high- quality. Favorable migration paths have played a key role in hydrocarbon accumulation in the North Buzachi Uplift,where the most favorable traps in the Mesozoic are the elongated faulted anticlinal structures in the northern part and top of the Uplift. Exploration potential in the Paleozoic Bashkirian and Asselian carbonate reservoirs also cannot be ignored. In the middle and eastern part of the basin, the Jurassic and Eocene reservoirs are of limited potential, but the Lower Cretaceous in the northeastern region may become a new exploration target. In addition, it is possible to discover hydrocarbon in the Carboniferous Visean reservoirs in the southeastern part of the Basin.

关 键 词：运移通道 沉积环境 储层 烃源岩 北乌斯丘尔特盆地 中亚 

分 类 号：TE122.1[石油与天然气工程—油气勘探]