The gas providing condition of Klqn and Kln1+2 to S,P,G oil layers in the west of Daqing placanticline is better than that in the east of Daqing placanticline.

• 大庆长垣以东地区沙河子组-营城组源岩向萨、葡、高油层的供气条件优于以西地区;