Oil production from the Bakken and Eagle Ford shale plays look like they’ve peaked and other shale plays may not be far behind.

Oil production from seven major U.S. shale plays is expected to fall by a total of 86,000 barrels a day in June, according to a monthly report from the Energy Information Administration released Monday. The previous report released a month ago also showed a forecast for a fall of 57,000 barrels a day in May.

Oil output at the Eagle Ford shale play in South Texas is forecast to see the biggest decline, down 47,000 barrels a day in June. The Bakken shale play, which stretches from Canada into North Dakota and Montana, is expected to see output fall by 31,000 barrels a day, the report said. That would follow forecast declines in both regions for the month of May.

“The data shows that production in the Bakken and Eagle Ford [plays] peaked in March at 1.33 million barrels a day and 1.73 million barrels a day, respectively,” said James Williams, energy economist at WTRG Economics.

U.S. Energy Information Administration

“With only a 7,000 barrel-a-day increase anticipated in the Permian Basin, it is safe to say that on a national basis U.S. production has topped out,” Williams said. “At the current level of drilling activity, the Permian Basin should top out in June and go into a slow decline in July.”

Strong shale oil production, which contributed to the nation’s crude supply glut, was a key reason for the drop in oil prices in the second half of last year. Prices are still down more than 40% from their peak of roughly $106 a barrel last summer.

June crude CLM25, settled at $59.25 a barrel Monday, down 14 cents.

Still, the rate of decline for shale oil production “isn't fast enough to expect a change in [the Organization of the Petroleum Exporting Countries’] policy at the June 5 meeting,” said Williams. “With declining U.S. production, OPEC’s market share should increase over the rest of the year.”