On the path to the digital rock physics of gas hydrate bearing sediments – processing of in-situ synchrotron-tomography data
On the path to the digital rock physics of gas hydrate bearing sediments – processing of in-situ synchrotron-tomography data
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DOI：
10.5194/se-7-1243-2016
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发表时间：
2016-08
期刊：
影响因子：
3.4
通讯作者：
Kathleen Sell;E. Saenger;A. Falenty;M. Chaouachi;D. Haberthür;F. Enzmann;W. Kuhs;M. Kersten
中科院分区：
文献类型：
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作者：
Kathleen Sell;E. Saenger;A. Falenty;M. Chaouachi;D. Haberthür;F. Enzmann;W. Kuhs;M. Kersten
抽象的。迄今为止，很少有人知道的天然气水合物在沉积基质中的分布及其对寄主岩石的地震特性的影响，特别是在低水合物浓度。数字岩石物理学提供了一个独特的方法来解决这个问题，但需要高质量，高分辨率的3-D表示的岩石物理和运输性能的准确建模。虽然这样的模型可以通过原位同步辐射X射线断层扫描很容易地获得，但对这些数据的分析需要复杂的工作流程和高计算能力来维持有价值的结果。在这里，我们提出了一个最佳实践程序，通过数据后处理补充了Chaouachi等人（2015）的数据，包括图像增强和分割以及使用导出结果进行的三维声波传播的示例性数值模拟。层析成像和三维建模的结合开辟了一条道路，以更可靠的推导含天然气水合物沉积物的性质，而不依赖于理想化的和经常不精确的模型。
Abstract. To date, very little is known about the distribution of natural gas hydrates in sedimentary matrices and its influence on the seismic properties of the host rock, in particular at low hydrate concentration. Digital rock physics offers a unique approach to this issue yet requires good quality, high-resolution 3-D representations for the accurate modeling of petrophysical and transport properties. Although such models are readily available via in situ synchrotron radiation X-ray tomography, the analysis of such data asks for complex workflows and high computational power to maintain valuable results. Here, we present a best-practice procedure complementing data from Chaouachi et al. (2015) with data post-processing, including image enhancement and segmentation as well as exemplary numerical simulations of an acoustic wave propagation in 3-D using the derived results. A combination of the tomography and 3-D modeling opens a path to a more reliable deduction of properties of gas hydrate-bearing sediments without a reliance on idealized and frequently imprecise models.