【摘要】 本文利用露头、钻井、航空照片和地震反射等资料,通过地层对比与构造分析等综合研究手段,分段解剖了秋里塔格构造带地层结构与构造变形特征,进而探讨了地层结构对构造变形和油气成藏的影响。秋里塔格构造带东、西地层结构有显著差异,发育几套非能干层,如膏盐岩和煤系等塑性地层,其发育层位和展布范围侧向变化迅速,形成多个滑脱面,将中新生代变形地层分为深、浅两套变形序列。受滑脱面侧向变化的控制,深、浅变形序列卷入地层及其构造样式和类型发生相应的转变。此外,受不同的地层结构和构造演化背景的控制,该带东、西形成两种截然不同的油气成藏类型,即近源垂向运移型和远源侧向运移型。更多还原

【Abstract】 The Qiultaq anticline belt lies to the front of the Kuqa fold-and-thrust belt along the south piedmont of the Tianshan Mountains. In order to better understand the structural style variation and its effect on hydrocarbon accumulation along the strike of the Qiultaq anticline belt, both structural style and stratigraphy of different parts of the belt were investigated in details. The synthesized structural analyses demonstrated that the stratigraphic configuration varied along the strike of the belt. The paper proposed that the stratigraphy played an important role in the variations in deformation style. Several different detachments were identified along the Qiultag anticline belt, and their location and extent were controlled by stratigraphy. Vertically, these detachments acted as an interface, separating the strata into the upper and the lower deformed stratigraphic successions. Laterally, the detachments changed rapidly, which resulted in a corresponding transformation in the deformational styles. The change and dying-out of detachments with depth was responsible for the forming of oblique/lateral ramps and terminated folds in the lower deformed stratigraphic sussession. In addition, the formation of hydrocarbon reservoirs was also largely controlled by the stratigraphic variation, so that the reservoir-formation characters were obviously different between the eastern and western parts of the Qiultag anticline belt.更多还原