Washburn K E, Callaghan P T
MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, New Zealand.
Phys Rev Lett. 2006 Oct 27;97(17):175502. doi: 10.1103/PhysRevLett.97.175502. Epub 2006 Oct 23.
We observe the movement of water over time between pores of differing sizes in Castlegate sandstone. To achieve this, we perform an NMR transverse relaxation exchange experiment for several mixing times. The resulting data are converted to 2D T2 distributions using a 2D inverse Laplace transform (ILT). We show for the first time that quantitative analysis of ILT distributions enables one to extract characteristic times for different pores sizes. This information is potentially useful for permeability determination as well as better understanding of exchange between specific pore subpopulations.
我们观察了卡斯尔盖特砂岩中不同大小孔隙间水随时间的运动情况。为实现这一点，我们针对多个混合时间进行了核磁共振横向弛豫交换实验。利用二维逆拉普拉斯变换（ILT）将所得数据转换为二维T2分布。我们首次表明，对ILT分布进行定量分析能够提取不同孔隙大小的特征时间。该信息对于渗透率测定以及更好地理解特定孔隙亚群之间的交换可能具有重要意义。
