  Well performance index (WPI), which is an indicator on how much producing
potential a well has, is proposed for Cana Field using the available
information from the completion database. I used ordinary kriging and
co-kriging to create interpolation maps for WPI across the region. The
interpolation results can be used to predict WPI values for locations that have
not gone through drilling programs, thus guiding operator to find the next
drilling locations. Different kriging models' performance are compared using
cross-validation. It is shown co-kriging with clean fluid volume has the best
performance. Recommendations are given regarding new well locations.
