Department of Civil Engineering, Queen's University, Kingston, Ontario, K7L 3N6, Canada.
Ground Water. 2010 Nov-Dec;48(6):836-43. doi: 10.1111/j.1745-6584.2010.00722.x.
Numerical modeling was employed to study the performance of thermal conductive heating (TCH) in fractured shale under a variety of hydrogeological conditions. Model results show that groundwater flow in fractures does not significantly affect the minimum treatment zone temperature, except near the beginning of heating or when groundwater influx is high. However, fracture and rock matrix properties can significantly influence the time necessary to remove all liquid water (i.e., reach superheated steam conditions) in the treatment area. Low matrix permeability, high matrix porosity, and wide fracture spacing can contribute to boiling point elevation in the rock matrix. Consequently, knowledge of these properties is important for the estimation of treatment times. Because of the variability in boiling point throughout a fractured rock treatment zone and the absence of a well-defined constant temperature boiling plateau in the rock matrix, it may be difficult to monitor the progress of thermal treatment using temperature measurements alone.
数值模拟被用来研究在各种水文地质条件下，热导加热（TCH）在裂缝性页岩中的性能。模型结果表明，除了在加热开始时或地下水流入量高时，裂缝中的地下水流动不会显著影响最小处理区温度。然而，裂缝和岩石基质的性质可以显著影响在处理区域中去除所有液态水（即达到过热蒸汽条件）所需的时间。基质渗透率低、基质孔隙度高和裂缝间距宽会导致岩石基质中的沸点升高。因此，了解这些性质对于估计处理时间很重要。由于在裂缝性岩石处理区域中沸点的变化以及在岩石基质中没有明确的恒温沸腾平台，仅通过温度测量来监测热疗的进展可能很困难。
