SPWLA Glossary

(1) Well log track on the API log grid. Holding the well log vertically so that the top of the well appears at the top of the log,

<tr>
  <td >Track 1 </td>
  <td >&nbsp;= &nbsp;</td>
  <td >Log track on the left side of the log. Left of the depth column.</td>
</tr>
<tr>
  <td>Track 2</td>
  <td>&nbsp;= &nbsp;</td>
  <td>Log track to the immediate right of the depth column and in the middle of the log.</td>
</tr>
<tr>
  <td>Track 3 </td>
  <td>&nbsp;= &nbsp;</td>
  <td>Log track on the far right side of the log.</td>
</tr>

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See scale for illustration.

(2) Follow parallel or nearly parallel.