In the future, WASH the rice first: that is, rinse and strain or drain two or three time. This takes some of the starch out. The oil at the bottom of the pot is not a bad idea.
For now, add some chicken broth with a tablespoon of butter or oil or margarine. Put enough of the broth to cover the bottom of a saucepan, then add your already under-cooked rice. Turn the flame on. Keep adding the rice and stir often, not letting the rice burn, till you like the consistency.