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本文对山东东营凹陷沙河街组介形虫化石壳体的保存特征进行了研究。研究结果表明：沙河街组介形虫化石壳体颜色可分为浅色、中色和深色三种类型；按有无充填物，可分为未充填壳和充填壳两种，其中充填壳充填物的成分有方解石、白云石、黄铁矿和泥质四种；按完整程度有双瓣壳、单瓣壳和碎壳。文中对这些保存特征形成的原因进行了讨论，最后以一口井的研究结果为例，探讨了介形虫保存特征在古湖泊学及石油地质方面的应用。
In this paper, the preservation characteristics of the ostracod shell of the Shahejie Formation in Dongying Depression of Shandong Province were studied. The results show that the color of the fossil shell of the ostracod fossils in Shahejie Formation can be divided into three types: light color, medium color and dark color. According to the presence or absence of filling, the fossil shells can be divided into two types: unfilled shell and filled shell, Filling composition of calcite, dolomite, pyrite and mud four; according to a complete degree of double valve shell, single valve shell and broken shell. In this paper, the reasons for the formation of these preserved features are discussed. Finally, taking the results of a well as an example, the application of the conservation characteristics of the ostracods in ancient lakes and petroleum geology is discussed.