Rehabilitation vs. Redrill -- A Difficult Question
Certainty of the rehabilitation effort, site restrictions, customer demand and cost all must be evaluated carefully.
What exactly causes the well to need rehabilitation? Among other things, clogging of perforations, biofouling, sand sealing or cementation in the near-well zone (e.g. filter pack) certainly may be to blame. Corrosion that causes enlargement of perforations or holes in the casing or screen also may be the culprit.