The geometry of sedimentary basins is normally described by the interpretation of seismic reflectors. In addition to that, rock properties of the sedimentary successions between these reflectors give further insight into the subsurface geology. Here, we present a model for the Bay of Mecklenburg, situated at the northeastern margin of the North German Basin. The model consists of eight layers; it covers seismic velocities of sediments from the Neogene down to the base of the Permian Zechstein. We use eight seismic profiles for model building and apply seismic migration velocity analysis in combination with pre-stack depth migration. The results are interval velocities down to a depth of 5000 m. A further aim of the study is to investigate the sensitivity of these indirectly deduced velocities in comparison to direct measurements within drill holes. The velocities from this study are in good agreement with earlier results from vertical seismic profiling at a nearby well. Cenozoic and Mesozoic strata within the Bay of Mecklenburg show clear depth-dependent velocity trends. A comparison of these trends with predicted compaction trends shows that burial anomalies within Lower Triassic units are significantly higher than in Upper Cretaceous units. This finding could be explained by a greater amount of erosion during Upper Jurassic/Lower Cretaceous times than during Cenozoic times. The Zechstein layer shows a decreasing interval velocity with increasing thickness. Our study demonstrates that seismic velocities deduced from surface-based measurements are of high value in areas with sparse drilling coverage.

通常通过解释地震反射器来描述沉积盆地的几何形状。除此之外，这些反射器之间的沉积演替的岩石性质还可以进一步了解地下地质情况。在这里，我们介绍了位于北德意志盆地东北边缘的梅克伦堡湾的模型。该模型由八层组成。它涵盖了从新近纪到二叠纪Zechstein基底的沉积物的地震速度。我们使用八个地震剖面进行模型构建，并结合叠前深度偏移应用地震偏移速度分析。结果是间隔速度下降到5000 m的深度。该研究的另一个目的是研究与钻孔内直接测量相比，这些间接推导的速度的敏感性。这项研究的速度与附近一口井的垂直地震剖面分析的早期结果非常吻合。梅克伦堡湾内的新生代和中生代地层显示出明显的深度相关速度趋势。将这些趋势与预测的压实趋势进行比较后发现，下三叠纪单元内的埋藏异常明显高于上白垩统单元内的埋藏异常。这一发现可以解释为上侏罗纪/下白垩纪时期比新生代时期的侵蚀量更大。Zechstein层显示出随厚度增加而减小的区间速度。我们的研究表明，从基于地面的测量结果推导出的地震速度在稀疏的钻探范围内具有很高的价值。