Oil-and-gas producers have been on a steady upward path in recent years, but the global oil supply has been shrinking as a result of a glut of shale oil and gas.

A new report shows that the oil and natural gas sector is facing a crisis.

“With the U.S. in the midst of a historic drought and a global economic slowdown, the world needs to focus on reducing reliance on imported oil and finding alternatives,” said Daniel H. Stern, chief executive officer of the Energy In Depth Alliance, a non-profit research group.

“While the sector is still growing, it’s going to be harder and harder to sustain oil production as a whole.”

In 2018, the average price for U.s. crude oil fell to $42.60 per barrel from $47.15 per barrel in 2017, according to a report from Bloomberg.

“As oil prices have fallen, production has also fallen,” said Stephen J. Guttman, president of Bloomberg Intelligence.

“There’s been a real decline in the volume of production.”

With production declines and a glut in oil, OPEC members are set to meet in December to discuss their future direction in the battle against a global glut.

The Organization of the Petroleum Exporting Countries (OPEC) is expected to meet again in 2018 to discuss how to manage oil production.

“This is the time of year when countries are looking at how they’re going to balance their budgets,” said Brett C. Gershman, an analyst at Wedbush Securities.

“They’re going through all these discussions.”

Oil and gas companies have been steadily reducing their spending on exploration, upgrading wells, and developing new technology to get to more productive reserves.

The industry has been able to grow because of a boom in shale oil, which is made from the tar sands of Canada and the Bakken shale in North Dakota.

But shale gas has also boomed, and many of the companies that made up the shale boom are now facing a downturn in demand.

According to the report, companies have spent $1.3 trillion on new technologies since 2014, and $1 trillion on drilling in the United States, compared to $1 billion in the previous decade.

In 2018 alone, companies spent $7.5 billion on exploration and development, up by $1,000 from 2017.

This includes $1 million for a drilling rig, $300 million for an oil well, and more than $600 million for seismic equipment.

“The world has changed, and the future of oil is going to depend on the decisions the world makes in 2018,” Stern said.

“If the U,S.

and OPEC are able to continue their current course, we will see oil production grow again.”