塔中地区下古生界碳酸盐岩输导体系特征及成藏意义  

Characteristics and Accumulation Significance of the Pathway Systems in Lower Palaeozoic Carbonate,Tazhong Area

作　　者：白忠凯[1,2] 吕修祥[1,2] 于红枫[3] 伍建军[3] 

机构地区：[1]中国石油大学地球科学学院,北京102249 [2]中国石油大学油气资源与探测国家重点实验室,北京102249 [3]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《地质科技情报》2011年第5期60-68,共9页Geological Science and Technology Information

基　　金：国家自然科学基金项目(41072102);国家重点基础研究发展计划"973"项目(2005CB422108);国家重大专项(2008ZX05004-004)

摘　　要：剖析了塔中地区下古生界碳酸盐岩中断裂、裂缝、不整合面等输导体系基本要素的特征。垂向上,大型油源断裂沟通了烃源岩和储集层,实现了油气从深层向浅层的垂向运移。碳酸盐岩中发育的多期不整合面及岩溶缝洞为油气的侧向运移提供了有利通道。由断裂、不整合面和裂缝组成的输导体系控制了塔中油气的聚集和分布,大量发育的北东向走滑断裂输导体系则控制了油气的再次分配和富集,形成了油气"沿带聚集、成块富集"的格局。This paper analyzes the effect and characteristics of such pathway systems as faults,cracks,unconformity and karst in Lower Palaeozoic carbonate in Tazhong area.The bridging and interconnection of faults with the source rocks and reservoir beds led to the vertical migration of oil and gas.While the multi-stage regional unconformity surfaces,network systems of karstified fissures and caves made it feasible for oil and gas to migrate laterally.All the factors above constitute the hydrocarbon pathway systems and control the accumulation and distribution of oil and gas in Tazhong area.Large scale strike-slip fault systems trending NE control the secondary accumulation and distribution of oil and gas in the area.These factors cause oil and gas to accumulate along a belt and enrich in a block.

关 键 词：塔中地区 下古生界 碳酸盐岩 输导体系 

分 类 号：P618.130.2[天文地球—矿床学]