It applies to brown fields, as soon as they have accumulated sufficiently rich data (minimum of five years of production, with at least 10 producing wells).
The complexity of the Digital Behavior Twin is tuned in such a way it is comprehensive enough to include all key phenomena in the field, yet remaining simple enough to be calibrated unambiguously (US Patent).
No assumption needs to be made about geological properties, as their impact on production is already included in past data. This maximizes the reliability of the forecast.