准噶尔盆地东部地区燕山运动期断裂控藏机制  

Hydrocarbon Accumulation Mechanisms Controlled by Yanshanian Faults in Eastern Junggar Basin

作　　者：刘俊榜[1] 李培俊 胡智[3] 刘震[4] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油新疆油田分公司风城油田作业区,新疆克拉玛依834000 [3]中国石油新疆油田分公司勘探公司,新疆克拉玛依834000 [4]中国石油大学油气资源与探测国家重点实验室,北京102249

出　　处：《新疆石油地质》2014年第1期5-11,共7页Xinjiang Petroleum Geology

摘　　要：准东地区是准噶尔盆地主要油气富集区带之一,它在盆地形成和演化过程中经历了多期构造运动的强烈改造,形成了较为复杂的断裂系统。为查明该地区断裂与油气成藏的关系,洞悉断裂控藏机理,从研究区已知油气藏解剖入手,对控藏断裂特征进行了研究后指出,准东地区油气藏与断裂相伴而生、关系密切;在研究区众多断裂中,燕山运动期断裂对油气藏分布具有明显的控制作用;该地区成藏条件的空间配置以及成藏期次与构造演化的匹配关系决定了燕山运动期断裂作为油气输导通道的有效性,并控制了研究区油气藏的形成和分布;相对于燕山运动期断裂而言,先期(海西运动期、印支运动期)断裂形成过早,烃源岩尚未成熟,后期(喜马拉雅运动期)断裂多造成原生油藏的调整和破坏,均与现今油气藏分布关系不明显,而研究区油气成藏和分布明显受燕山运动期断裂的控制。这一新认识对准东地区今后油气勘探具有重要意义。The Zhundong area is one of major hydrcarbon enrichment belts in eastern Junggar basin.It experienced several intense transformations of multistage tectonic movements in the process of the basin formation and evolution,and resulted in complex fracture system.In order to find out the internal relationship between the faults and the hydrocarbon accumulation in this area and get insight into the formation mechanisms of the fault-controlled hydrocarbon distribution pattern,this paper started from the analysis of known hydrocarbon pools and studied the faults characteristics that controlled the distribution of the hydrocarbon pools.It is shown that the pools in Zhundong area have a close relationship to the faults in the formation process; of the numerous faults in the study area,the Yanshanian faults are of significant control effects on the pool distribution; the matching relationship between the spatial allocation and pool-forming period and the structural evolution determines the availability of the Yanshanian faults as oil-gas transporting channels,by which the formation and distribution of the hydrocarbon pools are controlled eventually; compared to the Yanshanian faults,the faults shaped in the early periods such as Hercynian and Indosinian movements are formed too early,at which the source rocks are not matured,while late faults formed in the Himalayan movement mostly serve as the adjustment and even destruction of the primary hydrocarbon accumulations,hence,both of them show little relationship to the distribution pattern of the current hydrocarbon pools.It is suggested that the hydrocarbon accumulation and distribution in the study area are obviously controlled by the Yanshanian faults,so the further exploration should focus on the traps adjacent to the Yanshanian faults.

关 键 词：准噶尔盆地东部 断裂期次 燕山运动 断裂控藏 输导通道 

分 类 号：TE112.42[石油与天然气工程—油气勘探]