QGC has only recently revealed to local press a radiation exposure incident that took place near Chinchilla in February.
It was reported that the radiation came from a Schlumberger “measurement device”.
The incident occurred on a drill rig south of Chinchilla which was operated by international oil and natural gas service company Weatherford.
QGC said the workers were exposed to a "low level of radioactivity" and medical examinations were performed.
QGC said it is still continuing to monitor the health of the exposed workers.
Australian Mining has approached QGC for further comment.