EPSRC grant EP/L012227/1 - Estaillades Carbonate

EPSRC grant EP/L012227/1: Development of Unified Experimental and Theoretical Approach to Predict Reactive Transport in Subsurface Porous Media. The effect of pore-scale heterogeneity on non-Darcy flow behaviour is investigated by means of direct flow simulations on 3-D images of Estaillades carbonate. The critical Reynolds number indicating the cessation of the creeping Darcy flow regime in Estaillades carbonate is two orders of magnitude smaller than in Bentheimer sandstone, and is three orders of magnitude smaller than in the beadpack. It is inferred from the examination of flow field features that the emergence of steady eddies in pore space of Estaillades at elevated fluid velocities accounts for the early transition away from the Darcy flow regime. Also available at https://www.digitalrocksportal.org/projects/10, DOI:10.17612/P73W2C. Further details can be found in Muljadi et al., Advances in Water Resources (2015), URL:http://dx.doi.org/10.1016/j.advwatres.2015.05.019.英国工程与物理科学研究委员会（EPSRC）资助项目EP/L012227/1：地下多孔介质反应输运预测的统一实验与理论方法开发。本研究通过对埃斯塔耶兹碳酸盐岩（Estaillades carbonate）的三维岩相图像开展直接流动模拟，探究了孔隙尺度非均质性对非达西流动行为的影响。研究发现，表征埃斯塔耶兹碳酸盐岩中达西蠕变流态终止的临界雷诺数（Reynolds number），较本特海默砂岩（Bentheimer sandstone）小两个数量级，较珠填充岩心（beadpack）更是低三个数量级。通过对流场特征的分析可知，当流体流速升高时，埃斯塔耶兹碳酸盐岩孔隙空间内形成的稳态涡流，是其更早偏离达西流动态的核心诱因。该数据集可于https://www.digitalrocksportal.org/projects/10获取，数字对象标识符（DOI）编号为10.17612/P73W2C。更多详细研究内容可参阅Muljadi等人发表于《水资源进展》（Advances in Water Resources，2015年）的学术论文，链接为http://dx.doi.org/10.1016/j.advwatres.2015.05.019。