The Tarim Basin is a typical composite superimposed basin with nine petroleum systems, which are divided into humic class in foreland area and sapropelic class in carton area.

• 塔里木盆地是典型的复合叠合盆地,共有9个油气系统,可分为前陆区的腐殖型和克拉通区的腐泥型两类。