ONEOK restarts construction of natural gas, NGL projects

December 10, 2021 By    

ONEOK Inc. plans to complete previously announced natural gas and natural gas liquids (NGL) infrastructure projects in 2023, including Demicks Lake III, a 200-million-cu.-ft.-per-day natural gas processing facility in the Williston Basin of North Dakota, and MB-5, a 125,000-barrel-per-day (bpd) NGL fractionator in Mont Belvieu, Texas.

Increasing producer activity and improving demand for natural gas and NGLs drove the decision to restart the projects, says Pierce H. Norton II, ONEOK president and CEO.

“Demicks Lake III will support producer development plans in the core of the Williston Basin while continuing our commitment to help customers reduce natural gas flaring, and MB-5 will accommodate NGL volume growth from across our operations, including the Rocky Mountain region and Permian Basin,” he says.

The Demicks Lake III natural gas processing plant in McKenzie County, North Dakota, is expected to cost about $140 million. It is supported by acreage dedications with primarily fee-based contracts and is expected to be completed in the first quarter of 2023. The new plant will increase ONEOK’s Williston Basin natural gas processing capacity to about 1.9 billion cu. ft. per day.

The MB-5 fractionator in Mont Belvieu, Texas, is fully contracted and expected to cost about $250 million. Expected to be completed in the third quarter of 2023, the facility will increase ONEOK’s total NGL fractionation capacity to more than 1 million bpd.

ONEOK is a midstream service provider connecting NGL supply in the Rocky Mountain, Mid-Continent and Permian regions with key market centers. It has an extensive network of natural gas gathering, processing, storage and transportation assets.

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Brian Richesson is the editor in chief of LP Gas Magazine. Contact him at or 216-706-3748.

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