In a comment you state you have Israeli citizenship.
According to Passport Index that is a pretty powerful passport which gives you visa-free access to 101 countries, including Portugal and Svalbard (Norway) for up to 90 days. On that basis, and as @o.m. commented, an airport detention seems extremely unlikely, unless they have something in their files you're not aware of.
Even if you want to visit a country for which you need a visa, an immigration offence from 25+ years ago is probably not going to count against you hugely (the US excepted, of course) providing the rest of your application stacks up. Tell the whole truth on the visa application, and you will likely be allowed in with that visa.
You can check out entry requirements for your proposed trip by inputting your full details and itinerary on IATA