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The Latest: Workers stop leak at Alaska well with salt water

This April 2017 photo provided by the U.S. Environmental Protection Agency shows an oil well that was misting natural gas on Alaska's frozen North Slope. Workers from the Alaska Department of Conservation and the Environmental Protection Agency on Saturday, April 15, 2017, were able to connect hoses to valves that allow pressure in the well to be reduced, according to a statement from the state conservation department. The Environmental Protection Agency says a crack in the BP wellhead near Deadhorse sent up mist of crude oil Friday before it froze over and an initial leak stopped. (U.S. Environmental Protection Agency via AP)

ANCHORAGE, Alaska (AP) — The Latest on a natural gas leak at a well on Alaska’s North Slope (all times local):

4 p.m.

A leak of natural gas from an Alaska North Slope oil well was plugged by pumping salt water down the well.

The Alaska Department of Environmental Conservation says the leak was plugged just after 3:30 a.m. Monday when the salt water offset upward pressure.

The department says the well will not be officially secured until a mechanical plug is put in place.

The well is operated by BP Exploration Alaska Inc., a subsidiary of BP.

The gas leak accompanied by a spray of crude oil was discovered Friday morning.

Responders say the crude oil spill appears to be limited to the drilling pad. Responders will try to confirm that crude oil did not reach nearby tundra.

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9:30 a.m.

Officials say a leak of natural gas at an oil well on Alaska’s North Slope has been plugged.

Alaska Department of Environmental Conservation spokeswoman Candice Bressler says the well operated by BP Exploration Alaska Inc., a subsidiary of BP, was successfully controlled overnight.

BP employees discovered an uncontrolled natural gas leak Friday at a well five miles from the Deadhorse airport.

Within an hour, they detected that the well also was spraying a mist of crude oil.

BP set up a unified command with state and federal regulators to address the leaking gas and oil.

By Sunday responders had managed to close a valve that stopped the spray of oil. Officials say oil likely spilled only on the well pad and not nearby tundra.

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12:01 a.m.

Oil field workers have reduced the pressure in an oil well that is leaking natural gas on Alaska’s frozen North Slope.

The Alaska Department of Environmental Conservation says workers Saturday night were able to connect hoses to valves that allow pressure in the well to be reduced.

Pressure in the well was monitored all night and excess pressure released from the well.

Leaks were first detected Friday in the well operated by BP Exploration Alaska Inc., a subsidiary of BP.

A crack in the BP wellhead near Deadhorse sent up spray of crude oil Friday.

Closure of a safety valve stopped the spray of crude oil.

An unknown about of oil reached the well pad. Responders say they don’t believe it reached tundra off the pad but they can’t confirm that until the well is plugged and it’s safe for most workers to return to the drilling pad.

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A previous version of the story incorrectly stated the name of the Alaska Department of Environmental Conservation. The story also incorrectly said state and federal workers rather than oilfield workers had reduced pressure in the oil well.

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