塔中大油气田的构造成因与勘探方向  

The Tectonic Genesis and Exploration Targets of Large Oil-Gas Fields in Tazhong Area,Tarim Basin

作　　者：周新源[1] 李本亮[2] 陈竹新[2] 于红枫[3] 敬兵[3] 

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]中国石油勘探开发研究院盆地构造与油气成藏重点实验室,北京100083 [3]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《新疆石油地质》2011年第3期211-217,共7页Xinjiang Petroleum Geology

摘　　要：塔中古隆起长期稳定发育,塔中Ⅰ号、塔中Ⅱ号断裂控制了古隆起的基本构造格局,中央主垒带、塔中10号构造带在中奥陶世已经形成,控制了后期断裂的发育部位,具有明显的多期继承性发育的特征。两侧凹陷沉积了寒武系-下奥陶统和中上奥陶统两套主要烃源岩。塔中地区断裂结构复杂,由南向北的古生代早期逆冲构造控制了塔中地区边缘相带礁滩体以及风化壳岩溶储集层的发育,断裂同时改善了各类储集体的储集性能,形成了塔中地区多套受构造控制而差异分布的储集体。油气自斜坡向隆起高部位运聚、自深层沿断裂垂向运移并聚集的基本态势长期保持不变。塔中古隆起多期构造演化与成藏配置形成志留系—石炭系披覆碎屑岩构造-岩性油藏、上奥陶统沉积相控礁滩型油气藏、奥陶系风化壳型油气藏、寒武系白云岩岩性油气藏等4大勘探领域,勘探方向以寒武-奥陶系碳酸盐岩油气藏为主、志留系—石炭系碎屑岩油气藏为辅。Tazhong uplift developed stably in its long history and its basic structure framework was controlled by Tazhong No.1 and No.2 Faults.Faults in central uplift belt and Tazhong No.10 structural belt were formed in Middle Ordovician and affected the faults developed in later stages,showing obvious multistage inherited feature.Two sets of major hydrocarbon source rocks,Cambrian-Lower Ordovician and Middle-Upper Ordovician,were deposited on the two flanks of Tazhong uplift.The complicated fault structure in Tazhong area is characterized by that： multistage thrust structure from the south to the north formed in early Paleozoic controlled the development of reef-flat complex and weathering crust karst reservoirs in marginal facies zones of Tazhong area,and improved the properties of all kinds of reservoirs,thus forming multiple sets of reservoirs differentially distributed and controlled by the structures.It remained for a long time that petroleum was in migrating and accumulating from slope to uplift and from the deep to the shallow through faults.The multistage structural evolution and reservoir configuration allow to form the Silurian-Carboniferous drape clastic structural-lithologic reservoir,the Upper Ordovician sedimentary facies controlling reef reservoir,the Ordovician weathering crust reservoir and the Cambrian dolomite lithologic reservoir,which are as four major exploration domains.The Cambrian-Ordovician carbonate reservoirs are the main targets for exploration in Tazhong area,while the Silurian Carboniferous to Clastic reservoirs are the secondary targets.

关 键 词：塔里木盆地 隆起 断裂 油气藏形成 寒武系 奥陶系 

分 类 号：TE111[石油与天然气工程—油气勘探]