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松辽盆地是我国东部陆相大型含油盆地,主要由上侏罗统及白垩系组成,盆地经历了断陷期(晚侏罗世)—拗陷期(早白垩世)—萎缩期(晚白垩世—第三纪)三个发展阶段。盆地内已经发现的含油气层主要集中在下白垩统的拗陷期的沉积层内,包括泉四段(扶余油层)、青山口组(高台子油层)、姚家组(萨尔图、葡萄花油层)、嫩江组(黑帝庙油层),其中主要生产层为萨尔图、葡萄花油层(表1)。青山口组、姚家组沉积时期,在盆地北、西、东三个方向发育有四个河湖三角洲沉积体系,自边缘向中央拗陷深湖区延展,其中以北安—杏树岗三角洲为最大,面积达4.4万平方公里;保康三角洲次之;英台三角洲、齐齐哈尔三角洲更次之。
The Songliao Basin is a large continental oil-bearing basin in the east of China. It is mainly composed of the Upper Jurassic and Cretaceous. The basin underwent the processes of fault depression (Late Jurassic) -depression (Early Cretaceous) -trophy (Late Cretaceous - Tertiary) three stages of development. The hydrocarbon reservoirs that have been found in the basin are mainly concentrated in the sediments of the Lower Cretaceous depression depression, including the Quaternary Member (Fuyu Oil Layer), the Qingshankou Formation (Gaotaizi Formation), the Yaojia Formation (Salto, Putaohua Oil layer) and Nenjiang Formation (Heidimian oil layer), of which the main production layer is Salto and Putaohua (Table 1). During the sedimentation of the Qingshankou Formation and Yaojia Formation, there are four sedimentary systems of rivers and lakes in the north, west and east of the basin, extending from the edge to the deep lakes and lakes in the central depression. Among them, the Beian-Xingshuang delta is The largest area of 44,000 square kilometers; followed by the Baokang Delta; Taiwan Delta, Qiqihar Delta more.