Marathon Petroleum Corp's joint-venture Centennial Pipeline could be converted to move natural gas liquids to Texas and its flow reversed southward from Illinois within two years, Enterprise Products Partners said in an investor presentation on Sept. 8.

The 795-mile (1,279 km) Texas-to-Illinois refined products pipeline can move up to 210,000 barrels per day, but has been largely empty since mid-2011. Marathon operates the line and Enterprise is its 50 percent partner. Enterprise stopped moving products in the line last year.

Enterprise said both companies own pipelines that could be repurposed to connect Centennial to Utica and Marcellus NGL output. The line could move 100,000 bpd to Texas once pump stations are reversed and possibly more are added.

The project would take up to two years to complete, Enterprise said. Neither company disclosed a potential cost.

Marathon Chief Executive Gary Heminger said in July that Centennial could become a southbound NGL line with the necessary connection to Utica and Marcellus to maintain substantial throughput.

Tuesday's presentation at the Barclays CEO Energy-Power Conference in New York marked Enterprise's first disclosure of the potential project.