Permeability mapping in naturally heterogeneous sandstone cores by magnetization prepared centric-scan sprite
Permeability mapping in naturally heterogeneous sandstone cores by magnetization prepared centric-scan sprite
复制标题
通过磁化制备的中心扫描精灵绘制天然非均质砂岩岩心的渗透率图
DOI：
10.1002/aic.13778
复制
发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
B. Balcom
中科院分区：
文献类型：
--
作者：
Konstantin Romanenko;B. Balcom
本文讨论了一种适用于沉积岩岩心和粒状介质样品渗透率定量二维（2-D）成像的时间效率高的MRI方法。在垂直于平均流动方向的平面上的孔隙度和平均轴向速度的图像是确定岩心样品中渗透率的二维分布的必要条件。二维渗透率填图对于区分沉积岩中的层理、纹层、裂缝和断层相特别有用。该方法结合了13-间隔APGSTE方案和中心扫描SPRITE。已知APGSTE方案可显著减少扩散测量中的梯度相关误差。SPRITE方法提供了岩心样品中流体含量的定量信息。当只收集到几个靠近q空间原点的样品时，实验时间大大缩短。APGSTE-SPRITE方法通过对天然非均质砂岩岩心二维渗透率和三维速度场的成图来说明。© 2012美国化学工程师学会AIChE J，2012
A time-efficient MRI method suitable for quantitative two-dimensional (2-D) mapping of permeability in sedimentary rock cores, and granular media samples is discussed. The images of porosity and mean axial velocity in the plane transverse to the average flow direction are essential to determine 2-D distribution of permeability in a core sample. The 2-D permeability mapping is particularly useful for discrimination of bedding and lamination layers, fractures and fault facies that occur in sedimentary rocks. The proposed method combines the 13-interval APGSTE scheme and centric-scan SPRITE. The APGSTE scheme is known to substantially reduce gradient-related errors in diffusion measurements. The SPRITE method provides quantitative information on fluid content within the core samples. The experiment time is critically reduced when only a few samples near the q-space origin are collected. The APGSTE-SPRITE method is illustrated through mapping of 2-D permeability and 3-D velocity field in naturally heterogeneous sandstone cores. © 2012 American Institute of Chemical Engineers AIChE J, 2012