Thermal Imaging System for Multi-spatial and Multi-temporal Geoscience Investigations

多时空地球科学调查热成像系统

• 批准号: 439260-2013
• 负责人: Allen, Diana
• 金额: $ 8.02万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507542
• 关键词: Thermal; Imaging; System; Multi; spatial

Geological processes, such as sedimentary basin evolution, ore and hydrocarbon deposition, and volcanism and tectonism are inextricably linked to fluid flow processes. To understand the role of fluids in geological processes, we need to consider how fluid flow may be coupled to other processes, such as heat transfer and mechanical deformation. Thermal infrared (TIR) imaging of geological media (rock, soils, etc.) can enable the discrimination of low temperature contrasts between the fluid and the media through which it flows, while differences in surface emissivity can be used to characterise zones of alteration. The recent development of more portable and capable high resolution TIR video systems now permits accurate measurement of alteration, fracture networks and fluid in rock masses, making it possible to fully apply geomechanical and geochemical modelling to examine the temperature-dependent physicochemical processes of fluid flow. However, to date, there has been no comprehensive multi-spatial and multi-temporal study of multi-phase fluid flow through fractured geological media. The thermal images collected with this instrument will be draped on LIDAR/photogrammetric models along with the results of 3D ground deformation models. Eventually, in association with industry, we hope to develop the ability to fuse the thermal image data (in a similar manner to photogrammetry) to provide true 3D thermal models. Using the TIR video capability, the temporal progression of multi-phase fluid flow can be measured, and when integrated with multiple geophysical, geochemical and geomechanical datasets, produce comprehensive 4D models of the physicochemical fluid history. The TIR imaging system requested here will be employed immediately in a novel collaborative project to investigate the processes controlling multi-phase fluid (gas and liquid) flow through fractured geological media. We will explore the multi-temporal and multi-spatial characterization of seepage from fractures in natural (e.g. hydrological, geothermal) and engineered (e.g. soil and rock slopes, underground excavations) environments.

地质过程，如沉积盆地演化、成矿和油气沉积、火山作用和构造作用，都与流体流动过程有着不可分割的联系。为了理解流体在地质过程中的作用，我们需要考虑流体流动如何与其他过程耦合，例如热传递和机械变形。地质介质（岩石、土壤等）的热红外（TIR）成像可以区分流体和流体流经的介质之间的低温对比，而表面发射率的差异可以用来识别蚀变区。最近开发的更便携和功能更强的高分辨率TIR视频系统，现在可以精确测量岩体中的蚀变、裂隙网络和流体，从而可以充分应用地质力学和地球化学建模来研究流体流动的温度依赖性物理化学过程。然而，到目前为止，还没有全面的多空间和多时间的多相流体通过裂隙地质介质的研究。该仪器收集的热图像将与三维地面变形模型的结果沿着覆盖在激光雷达/摄影测量模型上。最终，与工业界合作，我们希望开发融合热图像数据的能力（以类似于摄影测量的方式），以提供真正的3D热模型。使用TIR视频功能，可以测量多相流体流动的时间进程，并且当与多个地球物理，地球化学和地质力学数据集集成时，可以生成物理化学流体历史的全面4D模型。这里要求的TIR成像系统将立即在一个新的合作项目中使用，以调查控制多相流体（气体和液体）流过断裂地质介质的过程。我们将探索自然（如水文，地热）和工程（如土壤和岩石边坡，地下开挖）环境中裂缝渗流的多时间和多空间特征。