ONEOK Inc. says that it plans to build additional natural gas liquids (NGL) and natural gas infrastructure at a total investment of more than $1 billion.

Additions include a 125,000-barrel per day (bpd) NGL fractionator – MB-5 – in Mont Belvieu, Texas, and related infrastructure. Projected cost is $750 million and the project will increase the company's total NLG fractionation capacity to more than 1 million bpd.

The company also plans to build a $410 million, 200-million-cubic-feet-per-day (MMcf/d) natural gas processing facility – the Demicks Lake II plant and related infrastructure – in the Williston Basin in North Dakota.

The Oklahoma-based company said that it also plans to build an extension of its Arbuckle II NGL pipeline and additional NGL gathering infrastructure to increase capacity between the Mid-Continent market hub and Arbuckle II. In a related investment, it plans to expand the Arbuckle II NGL pipeline by approximately 100,000 bpd to increase total capacity up to 500,000 bpd by adding pump stations. Protected cost is $300 million.

Additional natural gas gathering and processing capacity in the Williston Basin is intended to help support crude oil and natural gas production in North Dakota and help producers meet regional natural gas capture targets, the company says.

The Demicks Lake II natural gas processing plant and related infrastructure in McKenzie County, North Dakota, are expected to be completed in the first quarter of 2020. The other projects are expected to enter service in 2021.