My ventless gas log fireplace is putting off a bad odor me and my buddy both work in hvac and checked the o2 and it is fine we think it is the oderant in the natural gas, can I do anything to correct this problem so I can use my fireplace

The odorant in the gas itself will not be present when burning. If the CO test has been performed and is within specs of the manufacturer then I have no real idea what else you could do. This and other problems are why I do not care for any ventless equipment. Somewhere a while back I heard of the ventless logs themselves causing a problem by the material breaking down so you might want to have a look at them for possible deterioration.