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The crustal stress field of Germany: a refined prediction
Geothermal Energy ( IF 4.2 ) Pub Date : 2022-06-25 , DOI: 10.1186/s40517-022-00222-6
Ahlers, Steffen, Röckel, Luisa, Hergert, Tobias, Reiter, Karsten, Heidbach, Oliver, Henk, Andreas, Müller, Birgit, Morawietz, Sophia, Scheck-Wenderoth, Magdalena, Anikiev, Denis

Information about the absolute stress state in the upper crust plays a crucial role in the planning and execution of, e.g., directional drilling, stimulation and exploitation of geothermal and hydrocarbon reservoirs. Since many of these applications are related to sediments, we present a refined geomechanical–numerical model for Germany with focus on sedimentary basins, able to predict the complete 3D stress tensor. The lateral resolution of the model is 2.5 km, the vertical resolution about 250 m. Our model contains 22 units with focus on the sedimentary layers parameterized with individual rock properties. The model results show an overall good fit with magnitude data of the minimum (Shmin) and maximum horizontal stress (SHmax) that are used for the model calibration. The mean of the absolute stress differences between these calibration data and the model results is 4.6 MPa for Shmin and 6.4 MPa for SHmax. In addition, our predicted stress field shows good agreement to several supplementary in-situ data from the North German Basin, the Upper Rhine Graben and the Molasse Basin.

中文翻译:

德国的地壳应力场:一个精确的预测,德国的地壳应力场:一个精确的预测

关于上地壳绝对应力状态的信息在地热和油气藏的定向钻井、增产和开采等规划和执行中起着至关重要的作用。由于其中许多应用都与沉积物有关,我们为德国提出了一个改进的地质力学-数值模型,重点是沉积盆地,能够预测完整的 3D 应力张量。模型横向分辨率为2.5 km,纵向分辨率约为250 m。我们的模型包含 22 个单元,重点是使用单个岩石特性参数化的沉积层。模型结果显示了与用于模型校准的最小 (Shmin) 和最大水平应力 (SHmax) 的幅度数据的总体良好拟合。这些校准数据和模型结果之间的绝对应力差的平均值对于 Shmin 为 4.6 MPa,对于 SHmax 为 6.4 MPa。此外,我们预测的应力场与来自北德意志盆地、上莱茵河地堑和 Molasse 盆地的几个补充现场数据显示出良好的一致性。,关于上地壳绝对应力状态的信息在地热和油气藏的定向钻井、增产和开采等规划和执行中起着至关重要的作用。由于其中许多应用都与沉积物有关,我们为德国提出了一个改进的地质力学-数值模型,重点是沉积盆地,能够预测完整的 3D 应力张量。模型横向分辨率为2.5 km,纵向分辨率约为250 m。我们的模型包含 22 个单元,重点是使用单个岩石特性参数化的沉积层。模型结果显示了与用于模型校准的最小 (Shmin) 和最大水平应力 (SHmax) 的幅度数据的总体良好拟合。这些校准数据和模型结果之间的绝对应力差的平均值对于 Shmin 为 4.6 MPa,对于 SHmax 为 6.4 MPa。此外,我们预测的应力场与来自北德意志盆地、上莱茵河地堑和 Molasse 盆地的几个补充现场数据显示出良好的一致性。
更新日期:2022-06-27
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