准噶尔盆地复合含油气系统与复式聚集成藏  

Composite petroleum system and multi-stage hydrocarbon accumulation in Junggar Basin

作　　者：王小军[1] 宋永[2] 郑孟林[2] 任海姣 吴海生[2] 何文军[2] 王韬[2] 王霞田[2] 赵长永[3] 郭健辰 Wang Xiaojun;Song Yong;Zheng Menglin;Ren Haijiao;Wu Haisheng;He Wenjun;Wang Tao;Wang Xiatian;Zhao Changyong;Guo Jianchen(PetroChina Xinjiang Oilfield Company;Research Institute of Exploration&Development,PetroChina Xinjiang Oilfield Company;Exploration Department,PetroChina Xinjiang Oilfield Company)

机构地区：[1]中国石油新疆油田公司 [2]中国石油新疆油田公司勘探开发研究院 [3]中国石油新疆油田公司勘探事业部

出　　处：《中国石油勘探》2021年第4期29-43,共15页China Petroleum Exploration

基　　金：国家科技重大专项“新疆北部深层区域构造格架、沉积演化与有利区带评价”(2017ZX05008006-003-001)。

摘　　要：准噶尔盆地为新疆北部最大、最富集的含油气盆地,随着盆地勘探资料丰富,重新研究盆地油气形成与分布,明确大油气田富集层位和勘探方向,可为盆地整体勘探部署提供指导。应用地震、钻井、试油、油源对比等资料,通过油气藏解剖、有效烃源岩分布和生烃潜力的差异性再认识,将盆地石油地质演化与构造演化相结合,对盆地油气聚集成藏的复杂性进行系统研究。研究结果表明,准噶尔盆地经历了石炭纪海陆过渡相和二叠纪—新生代陆内盆地多旋回演化,形成了石炭系、中—下二叠统、上二叠统—三叠系、侏罗系、白垩系、新生界等多套构造层系,发育石炭系、中—下二叠统、中—下侏罗统3套主要烃源岩,存在中—下二叠统、上二叠统—三叠系和白垩系3套区域性盖层,形成了石炭系、二叠系和侏罗系三大含油气系统。明确了石炭系、中—下二叠统、中—下侏罗统八道湾组—西山窑组、侏罗系顶面与上覆地层存在的大型不整合面,控制了三大含油气系统原生油气藏分布。自海西晚期至喜马拉雅期发育4期主要断裂,在盆地内构成了立体输导网络,将三大含油气系统纵向沟通,形成了既相互独立又相互关联的原生油气藏与次生油气藏有序分布的复杂油气成藏系统。Junggar Basin is the largest and richest petroliferous basin in the northern Xinjiang area.With the deepening of exploration and more abundant of exploration data,it will provide guidance for the overall exploration deployment by re-studying the formation and distribution of oil and gas reservoirs in the basin,and identifying hydrocarbon enrichment formations of major oil and gas fields.Through the dissection of oil and gas reservoirs,recognition of effective source rocks distribution and the differences of their hydrocarbon generation potential,and combining the petroleum geological conditions and tectonic evolution in the basin,this paper carries out a systematic study on the complexity of hydrocarbon accumulation using seismic data,well data,well testing and oil-source correlation data.The results show that Junggar Basin has experienced multi cycle evolution of carboniferous marine-continental transitional facies and Permian-Cenozoic intracontinental basin.Multiple sets of structural layers,such as the Carboniferous,Middle-Lower Permian,Upper Permian—Triassic,Jurassic,Cretaceous and Cenozoic,are formed.Three sets of main source rocks,including the Carboniferous,Middle-Lower Permian and Middle-Lower Jurassic and three sets of regional caprocks of Middle-Lower Permian,Upper Permian-Triassic and Cretaceous are developed,forming three major petroleum systems of Carboniferous,Permian and Jurassic.The large unconformity surfaces between the top Carboniferous,Middle-Lower Permian,Middle-Lower Jurassic Badaowan-Xishanyao Formation and Jurassic and their overlying strata are identified,which control the distribution of primary oil and gas reservoirs in the three major petroleum systems.The four stages of faults developed from the Late Hercynian to Himalayan form a stereoscopic hydrocarbon transport network in the basin,and connect three petroleum systems vertically,resulting in a complex but orderly distributed oil and gas accumulation system with independent and interrelated primary and secondary oil and gas reservo

关 键 词：叠合盆地 复合含油气系统 复式油气聚集 准噶尔盆地 

分 类 号：TE112.3[石油与天然气工程—油气勘探]