We now know the name of the first man killed in a well explosion, Gabino Melendez of Odessa was killed at the scene.
Another employee, Jose Gallegos, was airlifted to Odessa Regional Medical Center, where he died wednesday evening.
The explosion happened when a crew of 15 Halliburton workers were "frac-testing" an oil well.
The two victims were reportedly the closest to the well and just a few feet from the explosion.
Halliburton says counselors will be helping the families through this tough time.