Abstract
The utility of horizontal well in Kubiki oil field has been confirmed through the production performance of the two horizontal wells recently completed in this field. However, the production forecast based on the Joshi's solution does not match the actual. Two possible reasons are (1) the uncertainty of several parameters required for the forecast and (2) the ambiguously determined drainage area.
To improve the quality of forecast, these uncertain parameters were examined through pressure analyses and the full-field simulation model was used. The resultant prediction is in good agreement with the actual production performance.
