**Table 1.**

*Understanding Wettability through Zeta Potential Measurements DOI: http://dx.doi.org/10.5772/intechopen.84185* 


**Table 2.** 

*Index/measurement values depicting different wetting states for different quantitative techniques.* 

the size of a pore, are mixed randomly [6]. Speckled wetting refers to the situation where oil tends to be trapped in pore throats rather than the pore bodies [7].

 All the developed techniques, currently employed, express wettability either quantitatively or qualitatively. A common limitation of all these traditional methods is their inability of in situ measurement of the state of wettability while the wettability alteration process takes place [8, 9]. **Table 1** summarizes the other specific advantages and limitations of wettability measurement practices that are commonly used. For the quantitative wettability techniques, **Table 2** shows the index/measurement values for the corresponding wetting states.
