【摘要】 较系统地研究了松辽盆地泰康地区上白垩统姚家组沉积相类型和沉积特征,研究表明,泰康地区姚家组仅发育三角洲相一种沉积相类型;垂向上,从姚家组一段到姚家组三段,自下而上、自北而南由三角洲水上平原亚相或三角洲水下平原亚相沉积逐渐变为三角洲水下平原亚相或三角洲前缘亚相沉积。演化过程可大致划分为早、中、晚3个时期,不同时期沉积特征表现有差异,总体表现为一个加积到缓慢的水进转变过程,物源来自北部。砂体类型有分流河道砂体、水下分流河道砂体、河口坝砂体及决口扇、天然堤与远砂坝砂体。含油性分析表明,三角洲前缘亚相的水下分流河道微相与河口坝微相发育区应是油气富集区,是今后该区油气勘探的有利地区。更多还原

【Abstract】 The types of sedimentary facies and sedimentary characteristics in the Upper Cretaceous Yaojia Formation in the Taikang area are systematically analyzed, and the spatial distribution and temporal evolution of sedimentary facies of the Yaojia Formation are studied in detail. Our data show that the Yaojia Formation is characterized mainly by deltaic facies. In this area, from the bottom to the top, and from the north to the south, the sedimentary subfacies gradually change from deltaic plain subfacies or subaqueous deltaic plain subfacies to subaqueous deltaic plain subfacies or deltaic front subfacies. The evolution of the sedinentary facies of the Yaojia Formation can be divided into three stages. The sedimentary characteristics are rather different among these stages. Overall, the sedimentary period of the Yaojia Formation shows a transition from aggradation to slowly transgression, with the source area located to the north of the Songliao Basin. There are mainly three types of sandstone reservoirs in the Yaojia Formation. They are branch river sandstone-body, subaqueous branch river sandstone-body and mouth bar sandstone-body. Analysis of the hydrocarbon significance of the different sandstone types shows that subaqueous branch river and mouth bar microfacies are the hydrocarbon accumulation facies. Thus, they should be the targets of future oil exploration.更多还原