## 3 Experimental Steps
### Lithologic Description of the Electrofacies  
An empirical interpretation of the identified electrofacies has been made by comparing the electrofacies classes to core descriptions for the well in which extensive set of cores were taken. The core descriptions were written by different geologists who may have emphasized different aspects of the rock or who used different definitions of their descriptive terms and hence, the interpretations are basically somewhat ambiguous, because Table 5 represents an amalgam of the contribution of the lithology classes in forming the identified electrofacies.  
Based on the information in Table 5, the lithologic contributions in each electrofacies are represented in Figure 4.  
The lithologic descriptions of the electrofacies can be obtained on the basis of the information in Table 5 and Figure 4, which are shown in Table 6 below:  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & \multirow{2}{*}{**Observed**} & \multicolumn{6}{c}{**Predicted**} \\  & & **EF 1** & **EF 2** & **EF 3** & **EF 4** & **EF 5** & **Correct (\%)** \\ \hline \multirow{6}{*}{Training} & EF 1 & 245 & 2 & 3 & 0 & 3 & 96.84\% \\  & EF 2 & 2 & 1213 & 0 & 0 & 0 & 99.84\% \\  & EF 3 & 1 & 0 & 236 & 0 & 2 & 98.74\% \\  & EF 4 & 0 & 1 & 0 & 5 & 1 & 71.43\% \\  & EF 5 & 4 & 5 & 0 & 0 & 191 & 95.50\% \\  & Overall (\%) & 13.17\% & 63.79\% & 12.49\% & 0.26\% & 10.29\% & 98.75\% \\ \hline \multirow{6}{*}{Testing} & EF 1 & 120 & 2 & 3 & 0 & 1 & 95.24\% \\  & EF 2 & 1 & 518 & 1 & 0 & 2 & 99.23\% \\ \cline{1-1}  & EF 3 & 2 & 0 & 106 & 0 & 0 & 98.15\% \\ \cline{1-1}  & EF 4 & 0 & 0 & 0 & 6 & 3 & 66.67\% \\ \cline{1-1}  & EF 5 & 0 & 0 & 0 & 0 & 68 & 98.55\% \\ \cline{1-1}  & Overall (\%) & 14.75\% & 62.59\% & 13.19\% & 0.72\% & 8.75\% & 98.08\% \\ \hline \hline \end{tabular}
\end{table}
Table 4: Confusion matrices for training and testing sets.  
From the preceding table it is vivid that,  
* Electrofacies 1: Mainly consists of Muddy Sandstone. However it also consists Sandy Mudstone, Granulestone, Silty Sandstone, Mudstone, Claystone and Sandstone, as shown in Table 6.
* Electrofacies 2: Mainly represents Sandstone. However, it also consists Granulestone, Silstone, Sandy Silstone, Silty Sandstone, Mudstone and Sandy Mudstone.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Very High** & **Medium** & **Low** & **Very Low** \\ \hline EF 1 & Muddy Sandstone & \begin{tabular}{c} Sandy Mudstone and \\ Granulestone \\ \end{tabular} & \begin{tabular}{c} Silty sandstone and \\ Mudstone \\ \end{tabular} & \begin{tabular}{c} Claystone, Sandstone \\ \end{tabular} \\ \hline EF 2 & \begin{tabular}{c} Sandstone and \\ Granulestone \\ \end{tabular} & \begin{tabular}{c} Silstone \\ Sandstone \\ \end{tabular} & \begin{tabular}{c} Sandy Silstone and Silty \\ Sandstone \\ \end{tabular} & Mudstone and Sandy Mudstone. \\ \hline EF 3 & Claystone & Sandy Mudstone & \begin{tabular}{c} Mudstone and Muddy \\ Sandstone \\ \end{tabular} & Sandy Silstone. \\ \hline EF 4 & Silston & & & & \\ \hline EF 5 & Silty Mudstone & Mudstone & Sandy Mudstone & \
\begin{tabular}{c} Claystone, Sandy Silstone and \\ Silty Sandstone \\ \end{tabular} &
\begin{tabular}{c} Silty Sandstone \\* Electrofacies 3: Mainly Represents Claystone. However it also consists Sandy Mudstone, Mudstone, Muddy Sandstone and Sandy Silstone.
* Electrofacies 4: Electrofacies 4 represents Siltston.
* Electrofacies 5: Mainly represents Silty Mudstone. However, it also consists Mudstone, Sandy Mudstone, Claystone, Sandy Silstone and Silty Sandstone.  
At this point, the classification rules generated from Section 3.3 can describe the electrofacies classes as well as the lithologic descriptions of the well.