Regionally, the stratigraphic traps make up of the channel pebbly sandstone and the slumping turbidite fan occurred in deltafront, and, the lithologic traps make up of the retrograding delta;

• 沟谷砂砾岩及三角洲前缘滑塌浊积扇可形成岩性圈闭，退积型三角洲可形成地层超覆圈闭；