On the gentle slopes, stratigraphic traps were mainly developed in the lake-floor-fan in LST, or formed by gravity flow deposited in pre-delta of TST and HST.

• 在盆地的缓坡部位，主要发育河流-三角洲复合体靠近深湖区的边缘地带的低位域湖底扇地层圈闭、水进域和高位域发育于前三角洲的重力流形成的地层圈闭。