That usually means your skin is actually dry. Hence as a self-defense mechanism, your body overproduce oils to protect the skin.

I'll assume you only been using a cleanser.

You need 3 things:
1. Obviously a moisturizer, don't just pick anything & everything that has the word "moisturize", "moisturizing" or "moisturizer" in its label. Learn & understand what can truly moisturize & what are merely gimmicks.
2. Balance back your oil production. If your skin has been conditioned to overproduce oil, it may continue to overproduce even though its already moisturized.
3. Stop drying up your skin. Air-conds & hot water is the top drying factor in our day to day life. Also, if you're using those "oil soaking" sheet to clear off the oils on your face, stop it immediately as it'll worsen your problem.