Oil futures settled lower Monday, as the latest data fed expectations that U.S. output will continue to rise this year, erasing some of the price gains scored late last week on a lower weekly U.S. oil-rig count.

April West Texas Intermediate crude US:CLJ8 lost 68 cents, or 1.1%, to settle at $61.36 a barrel. The contract on Friday jumped over 3% to settle at $62.04 a barrel on the New York Mercantile Exchange, turning what would’ve been a weekly loss into a climb of roughly 1.3% from the week-ago settlement.

May Brent crude UK:LCOK8, the global oil benchmark, fell 54 cents, or 0.8% to $64.95 a barrel. The contract rose 3% Friday, to end at $65.49 a barrel on the ICE Futures Europe exchange—up 1.7% for the week.

Both WTI and Brent as recently as Thursday had marked their lowest settlements since mid-February.

Crude production from seven major U.S. shale plays is expected to see a climb of 131,000 barrels a day in April to 6.954 million barrels a day, according to a monthly report from the Energy Information Administration released Monday.

“The big take away is the implied annual rate of change,” James Williams, energy economist at WTRG Economics, told MarketWatch. “In the shale plays, the expected April production will increase oil at the annual rate of 1.5 million” barrels a day.

Williams also pointed out that based on the figures, U.S. shale plays this year will “add enough to U.S. production to match all the oil Venezuela currently produces.”

The report followed data from the EIA last week, which showed an increase of 86,000 barrels a day in total U.S. crude output for the week ending March 2. “That figure was close to in line with the February average weekly increase of 91,000 [barrels a day] and is still more than four times greater than the pace of production growth in 2017,” said Tyler Richey, co-editor of the Sevens Report.

“From a fundamental standpoint, that is a material concern as the U.S. oil industry alone could push the global market back into a surplus, which was the reason behind the 2014-2015 bear market in oil,” he said in a daily newsletter.

The Organization of the Petroleum Exporting Countries is breaking into two camps after more than a year of unity, The Wall Street Journal reported Monday. That split is driven by differing views over whether $70 a barrel sends U.S. shale companies into a production frenzy that could cause prices to crash.

On one side is Saudi Arabia, which wants oil prices at $70 a barrel or higher, and on the other is Iran, which wants them around $60. At stake is OPEC’s production limits, which are among factors helping the oil market’s monthslong recovery.

On Friday, Baker Hughes US:BHGE said that the number of active U.S. rigs drilling for oil fell by four to 796 this week. It was the first such decline in seven weeks.

Meanwhile, data out Friday did show that hedge funds and money managers cut their bullish bets on U.S. crude oil for the first time in three weeks.

“Rising production and inventory in the United States has been reducing fund sentiment since it peaked at the end of January,” ING commodities analysts said in a note.

In other trading, April gasoline US:RBJ8 fell 0.5% to $1.894 a gallon, while April heating oil US:HOJ8 fell 1.2% to $1.865 a gallon.

April natural gas US:NGJ18 bucked the downtrend among its energy peers, settling up 1.7% at $2.778 per million British thermal units, with forecasts for more cold weather in the eastern U.S. boosting expectations for heating demand.