Digital rock physics: A geological driven workflow for the segmentation of anisotropic Ruhr sandstone: micro-XRCT data set

The Ruhr sandstone is assigned to the Upper Carboniferous and is part of the Ruhr cyclothem located in North Rhine-Westphalia, which consists of clays, siltstones, mudstones, sandstones, and interbedded coal seams. The sediment was chemically and mechanically compacted, folded, and faulted during the Hercynian orogeny. The studied microstructure of the Ruhr sandstone indicates depths of up to 6000 m and reconstructed, possible temperatures of over 120 ºC. This results in a complex mineralogical structure compared to other sandstones such as the Berea sandstone or the Fontainbleau sandstone. As part of the Balcewicz et al. (2021) publication, we made a first attempt to study the Ruhr Sandstone using Digital Rock Physics (DRP). This dataset contains the underlying micro X-ray Computed Tomography (micro-XRCT) data set (projection and reconstructed images) used in Balcewicz et al. (2021). The scan was performed on a cylindrical Ruhr sandstone core sample with a diameter of 5 mm.

鲁尔砂岩（Ruhr sandstone）隶属于上石炭统，为位于北莱茵-威斯特伐利亚州的鲁尔旋回层的组成部分，该旋回层由黏土、粉砂岩、泥岩、砂岩及夹煤层构成。该沉积岩体在海西造山运动（Hercynian orogeny）期间经历了化学与机械压实、褶皱及断裂改造。通过对鲁尔砂岩微观结构的研究，可推断其形成埋藏深度可达6000米，反演得到的估算温度超过120℃。相较于贝雷砂岩（Berea sandstone）、枫丹白露砂岩（Fontainbleau sandstone）等其他砂岩，鲁尔砂岩的矿物结构更为复杂。作为Balcewicz等人（2021）发表成果的组成部分，我们首次尝试采用数字岩石物理（Digital Rock Physics, DRP）技术对鲁尔砂岩开展研究。本数据集包含Balcewicz等人（2021）研究中所使用的基础显微X射线计算机断层扫描（micro X-ray Computed Tomography, micro-XRCT）数据集，涵盖投影图像与重建图像。本次扫描的样品为直径5毫米的圆柱形鲁尔砂岩岩心。