Methane plumes spotted over oil, gas patch

A satellite spotted two plumes of planet-warming methane rising from a patch of East Texas that’s home to multiple oil and gas operations.

State regulators said they couldn’t identify the source of the methane, which is the primary component of natural gas and traps 80 times more heat than carbon dioxide in its first two decades in the atmosphere. Stemming methane leaks and stopping unnecessary releases is one of the most powerful steps that can be taken to slow global warming.

The two plumes were detected by geoanalytics company Kayrros using a Nov. 29 satellite observation from the European Space Agency. Kayrros estimated that the plumes originated from different sources east of Dallas, about 15 miles apart, in an area dotted with fossil fuel infrastructure.

The plumes had estimated release rates of 21 tons per hour and 24 tons per hour. It’s not possible to determine the duration of leaks because satellites capture only one moment in time. If they lasted an hour, the two clouds combined would equal the average annual emissions from about 800 cars running in the U.S.

Some methane plumes found by satellites can be tracked to specific sources, especially if a company reveals that it released gas at that location at that time. But without anyone stepping forward, the source of such plumes — where multiple companies are operating in a small area — can remain a mystery. On-theground monitoring is also sometimes used to link releases to specific producers.

Companies operating pipelines nearby include Boardwalk Pipelines, Enbridge and Atmos Energy. Boardwalk said it didn’t have any leaks or releases that could have caused the clouds. An Enbridge representative said the company isn’t aware of any such release. Atmos didn’t respond to multiple requests for comment.

Texas regulators also weren’t able to identify the source of the methane plumes. The Texas Commission on Environmental Quality wasn’t aware of the plumes, a representative said. A spokesperson for the Railroad Commission of Texas, the primary state regulator of the oil and natural gas industry, referred questions to the TCEQ.