There mainly distributes four series of source rocks,including Nenjiang,Qingshankou,Denglouku and Shahezi-Yingcheng formations of Cretaceous in Changling area,Songliao basin.

• 松辽盆地南部长岭地区主要分布有上白垩统嫩江组和青山口组、下白垩统登娄库组和沙河子组-营城组烃源岩。