Dynamical surface affinity of diphasic liquids as a probe of wettability of multimodal porous media
Dynamical surface affinity of diphasic liquids as a probe of wettability of multimodal porous media
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DOI：
10.1103/physreve.80.061601
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发表时间：
2009-12-01
影响因子：
2.4
通讯作者：
Ligneul, P.
中科院分区：
文献类型：
--
作者：
Korb, J. -P.;Freiman, G.;Ligneul, P.
我们介绍了一种使用非侵入性原位核磁弛豫色散来估计岩石/石油/盐水系统润湿性的方法。该技术扫描大范围的应用磁场，并产生有关流体与固体岩石表面动态相关程度的独特信息。与传统的横向弛豫研究不同，这种方法是对流体动态表面亲和力的直接探测。为了量化这些特征，我们引入了微观动态表面亲和力指数，该指数测量扩散流体与孔隙表面固定顺磁弛豫源之间的动态相关性（即微观润湿性）。我们将此方法应用于碳酸盐岩储层，已知碳酸盐岩储量约占世界石油储量的三分之二。尽管这种非破坏性方法在此涉及岩石的应用，但它可以概括为适用于包括多孔生物介质在内的任何多模式多孔介质的原位液体/表面亲和力指示器。
We introduce a method for estimating the wettability of rock/oil/brine systems using noninvasive in situ nuclear magnetic relaxation dispersion. This technique scans over a large range of applied magnetic fields and yields unique information about the extent to which a fluid is dynamically correlated with a solid rock surface. Unlike conventional transverse relaxation studies, this approach is a direct probe of the dynamical surface affinity of fluids. To quantify these features we introduce a microscopic dynamical surface affinity index which measures the dynamical correlation (i.e., the microscopic wettability) between the diffusive fluid and the fixed paramagnetic relaxation sources at the pore surfaces. We apply this method to carbonate reservoir rocks which are known to hold about two thirds of the world's oil reserves. Although this nondestructive method concerns here an application to rocks, it could be generalized as an in situ liquid/surface affinity indicator for any multimodal porous medium including porous biological media.