USBM wettability index

Input(s)

$A_{1}$: Area Ratio of Oil Displacing Water (dimensionless)

$A_{2}$: Area Ratio of Water Displacing Oil (dimensionless)

Output(s)

$I_{U}$: Amott-Harvey Index (dimensionless)

Formula(s)

$$ \mathrm{I}_{\mathrm{U}}=\log \left(\frac{\mathrm{A}_{1}}{\mathrm{~A}_{2}}\right) $$

Reference(s)

Ghedan, S. G., Canbaz, C. H., Boyd, D. A., Mani, G. M., \& Haggag, M. K. (2010, January). Wettability profile of a thick carbonate reservoir by the new rise in core wettability characterization method. In Abu Dhabi International Petroleum Exhibition and Conference. Society of Petroleum Engineers. Page: 3.