论文部分内容阅读
对塔里木盆地东部的勘探程度较低,是塔里木盆地未来油气勘探的新远景区,对其沉积微相类型及沉积演化认识较薄弱。采用碳酸盐岩微相分析的方法,以沉积学理论为指导,充分利用岩心、录井、测井、地震及岩石薄片等资料,分析了塔里木盆地东部古城地区中—下奥陶统碳酸盐岩微相类型、沉积特征及分布规律。研究表明,塔里木盆地东部古城地区中—下奥陶统碳酸盐岩发育8种微相类型,根据微相类型组合特征,尝试建立了研究区碳酸盐岩微相的空间展布模式,同时将研究区划分出局限台地、开阔台地、台地边缘和台缘斜坡等4个沉积相带;探讨了古城地区早-中奥陶纪沉积环境的演化,认为广泛发育的台地边缘浅滩形成了奥陶系碳酸盐岩是最为有利的储集相带。
The exploration to the east of Tarim Basin is relatively low, which is the new prospect area of future oil and gas exploration in the Tarim Basin. The understanding of sedimentary microfacies types and sedimentary evolution is relatively weak. Using the method of carbonate microfacies analysis and the sedimentology theory as a guide, taking full advantage of the data of core, logging, logging, seismic and rock flake, the authors analyzed the carbonates of Middle-Lower Ordovician in the ancient city of eastern Tarim Basin Salt rock microfacies types, sedimentary characteristics and distribution. The results show that there are 8 types of microfacies in the Middle-Lower Ordovician carbonate rocks in the ancient city in the eastern part of the Tarim Basin. Based on the characteristics of the microfacies, the spatial distribution pattern of the carbonate microfacies in the study area is tried to be established. Meanwhile, The research area is divided into four sedimentary facies such as confined platform, open platform, platform margin and platform margin slope. The evolution of the Early-Middle Ordovician sedimentary environment in the ancient city area is discussed. It is considered that the extensively developed margin of the platform formed Ordovician Department of Carbonate is the most favorable reservoir facies belt.