塔里木盆地台盆区海西期地质事件及其油气成藏效应  

Hercynian geological events and their effects on hydrocarbon accumulation in Tarim Basin

作　　者：张仲培 王毅[1] 云金表 吴茂炳 张卫彪[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083

出　　处：《大庆石油学院学报》2007年第4期1-5,共5页Journal of Daqing Petroleum Institute

基　　金：国家"973"重点基础研究发展规划项目(G1999043310)

摘　　要：为认识塔里木台盆区油气成藏条件和勘探领域,从盆地分析角度出发,借助地震资料和沉积地层的分析结果,阐述塔里木盆地海西期一系列地质事件及其与油气成藏的关系.认为海西期内的断褶隆升-岩溶作用和早、晚古生代盆地的叠合,对于碳酸盐岩岩溶-裂缝型储集体的发育与优质储盖组合的形成至关重要,为中下奥陶统烃源岩在海西期末大量生成油气提供了运聚条件和富集场所.要加强台盆区的油气勘探,寻找早、晚古生代盆地叠置界面上下的优质碳酸盐岩溶-裂缝型储集层和向隆起上超的志留系-东河砂岩海相碎屑岩储集层仍将是重要勘探方向.A series of geological events took place in Tarim Basin in Hercynian periods,including two structural events in the end of middle Devonian and late Permian,the rise of sea-level and transgression in early Carboniferous,and magmatic activity in early Permian.The events had various effects on hydrocarbon accumulation in Hercynian period.The most important events were the formation of carbonate karst-fractured reservoirs due to regional uplifting and weathering and the development of reservoir-cap sets due to the superposition of the early and late Paleozoic Tarim Basin.The two aspects of geological events resulted in the migration channel and accumulation space for discharged hydrocarbon from the middle-lower Ordovician source rock in the end of Hercynian period.Thus,exploration of the carbonate karst-fractured reservoirs and the S-D clastic reservoirs overlapped along uplift slop between the early and late Paleozoic sedimentary rock is still the main target in exploration.

关 键 词：塔里木盆地 海西期 地质事件 油气成藏 

分 类 号：TE121.1[石油与天然气工程—油气勘探]