A Summary Of The Effects Of Various Pore Geometries And Their Wettabilities On Measured And In-Situ Values Of Cementation And Saturation Exponents

A number of papers written concerning a, m, and n derived from lab measurements concentrate on reporting the observed values - especially if they appear to be out of the normal ranges expected. A clear understanding of the physical aspects of the rock responsible for the observed measurements is not often presented mathematically or visually. Some papers do attempt to quantify the physical measurements observed. It is the purpose of this paper to summarize these findings and also contribute to the quantification of the effects of fractures and vugs on lab measured as well as in-situ cementation and saturation exponents. These quantifications will allow a petrophysicist to better integrated lab and log measurements with the geological realities of the reservoir.