Thanks vas it worked just fine :)
my main oil patch next to the refinery, ended up with just 1.2k oil inside it, and some other ones that were further away, had about 1.4k or 1.6k oil (since they were not always running)
now i can justify expansion to the next oil fields, and actually, i think in my next game, im going to play with a higher frequency of any types of patches (oil / ore etc) but lower quantity, and will need to manage other resources for exending the oil production (and useage) with some other mods like biocrude, which needs some proper oil, to make it diluted and more longer lasting :)
thanks again :)