本文以东营凹陷西部沙河街组三段上部自云岩为例,对白云岩产出的层序类型进行了分析,结果表明区内白云岩在不同钻井中产出的层序特征不同,分别与砂砾岩、粉砂岩、泥岩等互层.在上述基础上,运用层序地层学理论对白云岩层进行了层序地层学分析,其为高水位体系域晚期发展阶段的产物,是进积准层序的组成单元。 In this paper, taking the upper part of the third member of Shahejie Formation in the western Dongying Sag as an example, the sequence type of the dolomite output is analyzed. The results show that the sequence characteristics of the dolomite produced in different wells are different, Sandstone, siltstone and mudstone, etc. Based on the above, the sequence stratigraphy analysis of the dolomite layer is carried out by the theory of sequence stratigraphy, which is the product of the late stage of development of the highstand system tract, The order of the constituent units.