By comprehensive analysis of core, well logging, outcrop, and thin sections, this study identifies microfacies and microfacies associations within the Wusonggeer Formation in the central and northern Tarim Basin, establishes a sequence architecture, and analyzes the depositional evolution and controlling factors of the carbonate platform. The results show that 15 types of microfacies and 8 types of microfacies associations are identified in the Wusonggeer Formation in the study area and the depositional facies include evaporated platform (saline lagoon and gypsum dolomite flat), restricted platform (muddy dolomite flat, dolomite flat and intra-platform shoal), open platform (grain shoal and lime-dolomite flat), and platform margin reef. The Wusonggeer Formation can be divided into one composite sequence and three third-order sequences, corresponding to three evolutionary stages: ramp carbonate platform, weak-restricted carbonate platform, and weak-rimmed evaporative carbonate platform. The sequence architecture and depositional evolution of the carbonate platform were jointly controlled by the paleogeomorphic framework inherited from the Xiaoerbulake period, global sea-level fluctuations, relatively arid-hot climatic conditions, and elevated seawater temperatures.

通过综合分析岩芯、测井、露头和薄片等资料, 识别塔里木盆地中–北部吾松格尔组沉积微相和微相组合, 建立层序地层格架, 揭示其沉积演化特征和控制因素。结果表明, 研究区吾松格尔组共识别出15种沉积微相和8种微相组合, 发育蒸发台地(盐质潟湖和膏云坪)、局限台地(泥云坪、云坪和台内滩)、开阔台地(颗粒滩和灰云坪)和台地边缘礁沉积相带; 组内可划分为一个复合层序和3个的三级层序, 经历缓坡碳酸盐岩台地、弱限制性碳酸盐岩台地和弱镶边蒸发性碳酸盐岩台地 3 期沉积演化; 碳酸盐岩台地层序结构和沉积演化受肖尔布拉克组时期形成的古地貌格局、全球海平面变化、干热的气候条件和较高的海水温度协同控制。