Rinehart said the leak happened late Monday. The well had been shut down since January for routine maintenance, he said.
Even as the spill was deemed minimal, Department of Environmental Conservation spokeswoman Lynda Giguere said an investigation still is under way.
She said there was no immediate word on how much oil was leaked, but it was a matter of gallons rather than barrels. There are 44 gallons in a barrel.
Allison Iversen, coordinator for the state's Petroleum Systems Integrity Office, said the oil leaked for about five minutes.
The entire field temporarily shut down Friday when a vehicle clearing snow drifts damaged the power supply to processing centers.
The vehicle struck a compressed air line at the central power station. That line controls the power station's fuel system. As a result, seven plants shut down.




