Quantitative approach to coupled structural and thermal restoration of salt-bearing sedimentary basins: Application to the Pricaspian salt basin (south-eastern East European platform): Phase II

拟议的活动涉及在含盐沉积盆地(SB)中发生的最重要的过程：盆地的热和构造演化。我们打算以德国东北部盆地(中欧盆地系统)和普里卡斯海盆地(东欧盆地系统)为例，研究热力(热和结构耦合)恢复模型。这两大SBs在欧洲油气勘探开发中发挥着重要作用。此外，在两个盆地都获得了大量关于盐分引起的区域变形的观测数据。拟议研究的目标是通过三维(3D)数值模拟了解这些盆地演化所涉及的地球动力学、地热和构造过程之间的相互作用。该建议的具体目标如下：(I)发展结构和热机械恢复的三维数值方法；(Ii)研究特定盆地的现今热结构；(Iii)分析这些盆地的热机械演化；以及(Iv)将地震、热流和重力观测与我们的模型预测相结合，以增进对这些SBS演化的了解。我们期望获得以下结果：(1)用于模拟SBS结构和热机械恢复的三维数值算法和软件；(2)盆地现今热结构的模型；(3)盆地的热机械恢复模型；以及(4)关于两个盆地变形和温度场历史的改进知识。该方法同样适用于其他沉积盆地。

The proposed activity addresses most important processes occurring in salt-bearing sedimentary basins (SBSBs): thermal and structural evolutions of the basins. We intend to study thermo-mechanical (coupled thermal and structural) restoration models by the examples of the Northeast German Basin (Central European basin system) and Pricaspian Basin (East European basin system). These two major SBSBs in Europe play an important role in hydrocarbon explorations and exploitations. Moreover, a huge amount of observations on regional deformations due to salt have been acquired in both basins. The goal of the proposed research is to understand the interplay between geodynamic, geothermic, and tectonic processes involved in the evolution of these basins by means of three-dimensional (3D) numerical modelling. The specific objectives of the proposal are as follows: (i) to develop 3D numerical approaches to structural and thermo-mechanical restorations of SBSBs; (ii) to study the present-day thermal structures of the basins specified: (iii) to analyse the thermo-mechanical evolution of these basins; and (iv) to combine seismic, heat-flow, and gravity observations with our model predications in order to improve the knowledge of the evolution of these SBSBs. We expect to obtain the following results: (1) 3D numerical algorithms and software for modelling of structural and thermo-mechanical restorations of SBSBs; (2) models of present-day thermal structures of the basins; (3) thermo-mechanical restoration models for the basins; and (4) improved knowledge on the history of deformations and temperature field in both basins. The methodology developed will be applicable to other sedimentary basins as well.