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第七砂层组是东濮凹陷杜寨地区深部的主要储层，该砂层组发育于Ｅｓ３３亚段ＴＲ旋回层序Ⅰ的顶部，属辫状三角洲前缘亚相的水下分流河道及前缘砂坝沉积，其中以水下分流河道砂体储集物性较好。依据ＴＲ旋回层序的地质研究结果，应用速度、振幅、频率和相位等多项地震参数综合预测砂体分布，结果表明水下分流河道砂体呈东西向条带状展布于ＰＳ１２ＰＳ５ＰＳ４井区，具有明显的河道特征。预测的砂体分布与沉积相的平面展布以及钻井测试结果具有很好的一致性。
The seventh sand group is the main reservoir in the deep part of Duzhai area in Dongpu Depression. The sand group developed at the top of the TR sequenceⅠ of the Es33 subfacies and belongs to the submarine distributary channel of the braided delta front subfacies. Sediment sand dam deposition, of which the underwater distributary channel sand reservoir physical properties better. Based on the geological study results of the TR sequence, the distribution of sand bodies was comprehensively predicted by using a number of seismic parameters such as velocity, amplitude, frequency and phase. The results show that the underwater distributary channel sand bodies are distributed in the east-west strip in the well of PS12PS5PS4, Has obvious characteristics of the river. The predicted distribution of sand bodies is in good agreement with the plane distribution of sedimentary facies and the drilling test results.