A method of improving the production of a mature gas or oil field  said field comprising a plurality of existing wells  said method comprising: - providing a field simulator capable of predicting a production of said field in function of a given scenario  a scenario being a set of data comprising production paramete...

A production simulator (2)  for simulating a mature hydrocarbon field  providing quantity produced (Qfktb) per phase  per well  per layer (or group of layers) and per time as a function of production parameters (PP)  wherein said production simulator (2) matches history data (HD) of said mature hydrocarbon field and...