Its sedimentary facies lies in the fan deta and the front turbidity fan,the main reservoir bed in the sandstone of Ed3,and the local caprock in the mudstone of Ed2.

• 在凸起边缘可形成地层超覆油气藏,在缓坡带-洼陷带形成断层-岩性油气藏或岩性-构造油气藏。