中古3井区良里塔格组沉积相类型及模式建立

Type and Pattern Establishment of Sedimentary Facies of Langlitage Formation in Well Block Zhonggu 3

塔中Ⅰ号坡折带中古3井区在晚奥陶世良里塔格组沉积时期,处于碳酸盐台地的边缘相带,发育粒屑滩、灰泥丘及礁丘等亚相。研究表明,研究区沉积相的横向变化特征总体上表现为沿Ⅰ号坡折带发育礁滩复合体,往内侧则主要形成丘滩复合体。在纵向演化上丘滩体具有由内带向外带的发育前缘规律,晚期的丘滩体前积作用明显。

Well block Zhonggu 3 of No. I slope break zone of central Tarim basin is located in the margin facies belt of carbonate platform during the sedimentary period of the late Ordovician Langlitage formation, which developed subfacies such as grain beach, lime mud mound and knoll reef. The study shows that the lateral variation of the sedimentary facies is reef flat composite developed along the No. I slope break zone and mound bank composite formed on the inner side. The mound bank composite in vertical evolution has a development law that from the inside to the outside, and the progradation is obvious in late mound bank composite.