Against the background of the special structure of the northern steep slope,many kinds of sandy conglomeratic fans have been formed in the strata,which become the major exploration target now.

• 东营凹陷是东部陆相断陷湖盆一典型代表,其北部陡坡带特殊的构造背景,使沉积地层中各种成因的砂砾岩扇体极为发育,并成为勘探的重要目标。