I think what temr pointed out is quite interesting, I have been using petrel Re for the last 10 years and It s quit hard to work without it, however some small soft wares are really useful since they are cheap and too fast, I would highlight for example ..S3graph , it s fast, easy to work with and can do all the pre and post processing, there are still some issues with petrel that the user can do easily with another package (ex.. Rms) one example was what I experienced last week where I tried to update locally a structural model by just shifting 20m higher than it was from a designed ploygone... It was quit a lot of hassle to perform that, I also like the roxar rms in it s way on how you load data between different project... Petrel re has also some issues on simple reservoir engineering modeling ( advanced well model (ICD, ICV) is one of them, implementing a J function as formulas in intialization, modification of the CF for well connectivity if you apply a multiplier on permeability, the way how petrel export the VFP, and the way how petrel treat the WRFTPLT keyword..... In addition to the fact that the grids are left handed) I think one big scoop that petrel is lacking is the optimization on objective function, I have seen some plugins for history matching based on 4D seismic .... But I guess it still not mature and I think it s one of the reason why slb bought mepo
With regards to temr request, I think I would be really happy with a software like S3graph ..which is quite fast to visualize data, but I would rather need a simple workflow to modify a structural model, in addition to some thinking on petrophysical modelling and quick up scaling ... So the reservoir engineer can easily perform a modifications on his model based on dynamic data without going back to the geo model
Keep us on the loop
Gd luck