塔里木盆地巴楚隆起区奥陶系储层古构造研究

Study on the Paleostructure of Ordovician Reservoirs in Bachu Uplift Region of Tarim Basin

充分利用塔里木盆地巴楚隆起区地质、测井、岩心、地震等资料,在地层剥蚀厚度恢复和压实校正的基础上,通过古埋深计算,结合平衡剖面以及古断裂体系,采用PetroMod软件恢复了巴楚隆起区奥陶系鹰山组(O1-2y)顶面在主要构造活动期的构造面貌。结果表明:巴楚隆起区O1-2y顶面在加里东期由南高北低调整为西高东低;海西期巴楚隆起开始形成,北部隆升,O1-2y顶面由海西早期的南高北低变为南北高中间低;喜山晚期巴楚隆起强烈隆升,最终形成北高南低的格局。

By fully using regional geological,logging,core and seismic data from Bachu Area of Tarim Basin and on the basis of restoring erosive thickness of formation and compaction correction and calculation of ancient burial depth,the structural features of major structural activities on the top of Ordovician Yingshan Formation of Bachu Uplift Region were restored by using PetroMod software.The result shows that the feature of high in the south and low in the north is turned to the feature of high level in west and low level in the east.The Bachu Uplift is started to form in Haixi period with uplift in the north,its top feature is turned to the situation of high level in the south and north forms the feature of high level in the south and low level in the north in the early Haixi period.The Bachu Uplift raises strongly in the late Himalayan,and finally becomes a pattern of high level in the north and low level in the south.