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以单井沉积相分析为基础,结合地表露头资料、岩心观察、岩屑录井及薄片鉴定分析,确定出塔里木盆地东部地区寒武系—奥陶系沉积相类型为深海相、半深海—等深积岩相、浅海相和碳酸盐岩台地相,并进一步划分出若干亚相和微相。在沉积微相分析的基础上,研究了早寒武世—中奥陶世各时期的沉积相模式、平面展布特征和演化规律,认为早寒武世主要于东部发育台盆模式,中晚寒武世台盆模式更为明显,持续至早—中奥陶世该区中部发育深水坳拉槽沉积区,西部和东部则为台地相区及过渡带,为典型的三分结构。在台地与深海盆的边缘带发育礁滩储集体,有利于储层的发育。成岩作用类型复杂多样,其中以破坏性成岩作用占主导地位。
Based on single-well sedimentary facies analysis and combining with surface outcrop data, core observation, debris logging and thin-sheet identification analysis, it is determined that the Cambrian-Ordovician sedimentary facies in the eastern Tarim Basin are deep-seated and semi-deep-sea Deep sedimentary facies, shallow marine facies and carbonate platform topography, and further divided into several subfacies and microfacies. On the basis of the analysis of sedimentary microfacies, the sedimentary facies model, plane distribution characteristics and evolution of the Early Cambrian-Middle Ordovician were studied. It is concluded that the Early Cambrian developed the basin model mainly in the east, The Cambrian pedestal model is more obvious and lasts till early. The Middle Ordovician developed the deep-water aulacogen depositional area in the central part of the area, while the western and eastern parts of the Ordovician sedimentary facies and transitional zone are the typical three-part structure. The development of reef bank reservoirs in the margins of the platform and the deep basin is favorable for reservoir development. Diagenesis types are complex and diverse, of which the destructive diagenesis dominates.