松辽盆地泰康地区青山口组和姚家组沉积相

Sedimentary Facies of the Qingshankou Formation And the Yaojia Formation,Taikang Area,Songliao Basin

本文比较系统地研究了松辽盆地泰康地区青山口组和姚家组沉积相类型和沉积特征,青山口组主要发育湖泊相与三角洲相2种沉积相类型,姚家组仅发育三角洲相一种沉积相类型。区内青山口组主要存在3种类型的储层砂体:三角洲前缘河口坝砂体、三角洲前缘远砂坝砂体和浅湖砂体;姚家组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,浅湖沉积亚相、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。

The types of sedimentary facies and sedimentary characteristics in the Qingshankou Formation and Vaojia Formation in the Taikang area are systematically analyzed. Theresults show thatQingshankou Formation ismainly composed of lacustrine and delta facies. Our data show that the Vaojia Formation is characterized mainly by deltaic facies. There are mainly 3 types of sandstone--bodies reservoirs inQingshankou Formation. They are mouth bar sandstone--body, distal bar sandstone--body and lacustrine sandstone--body in turn. There are mainly three types of sandstone reservoirs in the Waojia Formation. They are branchriver sandstone--body, subaqueous branch river sandstone- body and mouth bar sandstone--body. Analysis of the hydrocarbon significance of the different sandstone types shows that the lacustrine subfacies area ,subaqueous branch river and mouth bar microfacies are the hydrocarbon accumulation facies. Thus, they should be the targets of future oil exploration.