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本文通过分析介形类化石组合与生态特征，结合优势度与信息函数分异度分析，进而探讨东营凹陷的古环境。认为东营凹陷沙三晚期存在以下５种环境：冲积－滨湖；冲积－三角洲平原；浅湖－三角洲前缘；较深湖－前三角洲和湖湾环境。
In this paper, we analyzed the paleontology of Dongying sag by analyzing the assemblages and ecological characteristics of the ostracods, combining the analysis of the dominance and the information function differentiation. It is concluded that there are five kinds of environments in the late Es3 of Dongying depression: alluvial-lakefront; alluvial-delta plain; shallow lake-delta front; deeper lake-front delta and lake environment.