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酒东盆地营尔凹陷中生界的扇三角洲相十分发育，其沉积作用活跃，流体类型丰富，主要以片状颗粒流沉积和片状牵引流沉积共存为特点。区内的扇三角洲沉积分布于紧邻盆地的活动的北部和东部边界断裂一侧，沉积相带发育齐全，由扇三角洲平原、扇三角洲前缘和前扇三角洲亚相组成，纵向上为下粗上细的退积型湖进层序，表明当时湖盆的沉陷速度超过了沉积补偿速度。扇三角洲相砂、砾岩与较深湖亚相暗色泥岩共生，加之中生界上部湖相泥岩和白云岩沉积连续，厚度较大，构成了一套完整的生储盖组合。
The fan delta of Mesozoic in Yeerde Sag of Jiudong Sag in the east of Shandong Basin developed very well with active sedimentary facies and rich fluid types, which are mainly characterized by the coexistence of lamellar particle flow sedimentation and lamellar traction sedimentation. The fan delta deposits in the area are distributed on the north and east boundary faults adjacent to the basin. The sedimentary facies belt is well developed and consists of fan deltaic delta, fan delta front and fan delta subfacies, The fine retrograde lake sequence, indicating that the lake basin subsidence speed exceeds the sedimentation compensation rate. The fan delta facies sand and conglomerate coexist with the darker sub-facies dark mudstone. In addition, the lacustrine mudstone and dolomite deposition in the upper Mesozoic are continuous and thick, forming a complete reservoir-cap assemblage.