The source rocks of carboniferous and early periman generated oil in middle triassic . the source rocks in middle periman reached the oil threshold in mid - late jurassic . the source rocks in jurassic hav n ' t reached the oil threshold 石炭系、下二叠统烃源岩于三叠纪中期成熟，中二叠统烃源岩于侏罗纪中?晚期成熟，侏罗系煤系烃源岩未进入生油门限。
