FOlks - the advice to watch for smooth transition of WBHP as you move from HM to forecast is good advice. I just want to suggest 2 points:
a) plotting WBP9 ( or WBP4 or just WBP) and WBHP during the HM & forecast provides visual information in regards PI. ( These are Eclipse terms)
b) If the wells are naturally flowing - using flow tables for producers may be one option for forecasting ( the PI calcibration recommendation still apply). This option allows you to better model wells dying at high watercut - even with lift. Cosntant WBHP may not be usueful as a constraint under these conditions. ( If the wells are "pumped off" this advice may not apply.

itag