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Probing Wettability in Carbonate Rocks by Multi-Frequency NMR Relaxation.
- Source :
-
AIP Conference Proceedings . 3/29/2011, Vol. 1330 Issue 1, p81-84. 4p. 2 Graphs. - Publication Year :
- 2011
-
Abstract
- We present a new method for probing wettability of rock/oil/brine systems using nuclear magnetic relaxation dispersion (NMRD). Unlike conventional transverse relaxation studies, this approach gives a direct probe of the dynamical surface affinity of fluids, thus allowing the separation of wetting from non-wetting fluids through their typical NMRD features. To quantify these features we introduce a microscopic dynamical surface affinity index which measures the dynamical correlation (i.e. microscopic wettability) between a diffusive fluid and fixed paramagnetic relaxation sources at the pore surfaces. We apply this technique to carbonate reservoir rocks of bimodal porosity saturated with oil (Sw = 0%), brine (Sw = 100%) and mixture of oil/brine (Swirr). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1330
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 59652097
- Full Text :
- https://doi.org/10.1063/1.3579183