Sheridan C. Swords
Executive Vice President, Commercial Liquids and Natural Gas Gathering and Processing at ONEOK
Thank you, Walt.
We saw strong year-over-year volume growth in 2023 with natural gas processing volumes up 14% and NGL volumes up 10% compared with 2022. Rocky Mountain region volumes were particularly strong with double digit growth in both NGL and natural gas processing volumes year-over-year. Higher producer activity levels, increased well connects and continued strong gas-to-oil ratios drove record fourth quarter volumes totaling nearly 400,000 barrels per day of NGLs and nearly 1.6 Bcf per day of processed volume.
Mid-Continent processed volumes increased 15% year-over-year and Permian Basin NGL increased 19% year-over-year, both benefiting from solid producer activity throughout the year in those regions. Well connects across our operations increased more than 50% compared with 2022. We continue to see the benefit of those connections throughout 2024 as volumes ramp.
Our Natural Gas Pipeline segment significantly exceeded its 2023 financial guidance range on higher earnings from long-term storage services and higher rates from negotiated fee-based contracts.
Our Refined Products and Crude segment adjusted EBITDA totaled more than $420 million in the segments first full quarter of operation since the acquisition of Magellan. This segment's performance was driven by mid-year tariff increases, longer-haul refined product shipments and steady crude oil transportation volumes. Our optimization and marketing activities, which includes liquids blending also benefited from strong margins and volumes.
Turning to 2024. Key drivers for our higher 2024 guidance include stable producer activity and continued production efficiency improvements, providing strong natural gas and NGL volumes across our systems, solid refined products demand continued strength in fee-based earning and rates and our first full year of annualized synergies.
In our Natural Gas Liquids segment, we expect higher year-over-year adjusted EBITDA and raw feed throughput volumes to be driven primarily by growth out of the Rocky Mountain region. Despite lower assumptions for incentivized ethane recovery in 2024 and a low-margin contract expiration from Overland Pass Pipeline in November of 2023, we still expect higher year-over-year NGL volumes. The expired contracts volume is being replaced with higher rate barrels ramping through 2024.
Healthy demand for ethane from the petrochemical industry and wide gas-to-oil ratios are setting up a positive backdrop for NGL markets in 2024. On our system, we've assumed high levels of ethane recovery continue in the Permian Basin in 2024 and partial continued opportunities to incentivize ethane recovery in the Rocky Mountain region. As Walt mentioned, we're officially moving forward with the expanding the Elk Creek pipeline to 435,000 barrels per day, increasing our total NGL capacity out of the Rocky Mountain region to 575,000 barrels per day. This additional capacity will support future growth and increased ethane recovery.
Moving onto the Natural Gas Gathering and Processing segment. We expect volume growth in the Rocky Mountain and Mid-Continent regions driven by higher-than-anticipated well connections in 2023 and consistent producer activity levels expected in 2024. In the Rocky Mountain region, we expect processing volumes to grow 9% at the midpoint compared with 2023 and average more than 1.6 Bcf per day in 2024. This outlook includes the impact from the weather we experienced so far this year, including well freeze-offs in mid-January when the wind chills dropped below negative 60 degrees. By the end of January, volumes had recovered to levels achieved prior to the extreme cold.
Strong producer activity levels in 2023 and the continued trend of high gas-to-oil ratios go several months of record North Dakota natural gas production with the latest record of 3.52 Bcf per day set in December. Producer activity has carried over into 2024, even through the winter months, as we enter March, there are 36 rigs in the Williston Basin with 20 on our dedicated acreage. Through detailed planning sessions with our customers, we expect additional rigs to return as we move into spring.
Additionally, we continue to see a trend our producers drilling longer laterals in the basin, 3 miles in length or more as opposed to the historical 2-mile laterals. These longer laterals continue to drive improved production efficiencies and result in fewer well connections needed to grow gathered volumes. As detailed in our earnings presentation, we expect 3-mile laterals to account for approximately 30% of the wells drilled on our acreage in 2024 compared with only 7%, 2 years ago.
In the Mid-Continent region, we are currently seeing approximately 45 rigs in Oklahoma with 6 operating on our acreage. We expect processing volumes to grow approximately 3% at our guidance midpoint compared with 2023 and average approximately 770 million cubic feet per day in 2024. Rig activity across the basin will continue to drive additional NGLs to our system.
In the Natural Gas Pipeline segment, we continue to expect strong demand for natural gas storage and transportation services in 2024. At the end of 2023, more than 75% of our natural gas storage capacity was contracted under long-term agreements, and our pipeline transportation capacity was nearly 96% contracted. We expect similar levels in 2024.
From a natural gas storage perspective, we continue to focus on expansion projects. We are currently working on a project to reactivate 3 Bcf of previously idled storage in Texas and are further expanding our injection capabilities in Oklahoma. In February 2024, the FERC approved the Saguaro connector pipeline's presidential permit, and we expect a final investment decision on the pipeline by mid-year 2024.
Moving on to the Refined Products and Crude segment. We continue to expect healthy business fundamentals and the segments more than 85% fee-based earnings to drive consistent performance. We'll see the full-year effect of higher refined products tariff rates driven by the mid-year 2023 increase of 11.5%. And we expect additional mid-single digit increases in July 2024. We also expect an increase in refined products volumes, including a benefit from the completion of our expansion to El Paso. Additional benefits are expected from higher volumes and margins related to liquids blending in 2024 driven by favorable market conditions and synergy-related opportunities. Walt discussed commercial synergies earlier, which we expect primarily to show up in our Refined Products and Crude segment's earnings.
Pierce, that concludes my remarks.