Two Houston companies, Cheniere Energy Inc. and Parallax Enterprises LLC, will work together to develop their two previously announced natural gas liquefaction projects in Louisiana.

Live Oak LNG, on the Calcasieu Ship Channel, and Louisiana LNG, on the Mississippi River in Plaquemines Parish, will be able to produce 5.5 million tons of liquefied natural gas per year. Both projects will export their LNG.

Bechtel Oil, Gas, & Chemicals Inc. is engineering the projects.

Construction on the projects could begin by 2017, with production as early as 2021, according to Cheniere.

Parallax acquired the Plaquemines project in April for an undisclosed sum. The company announced the Live Oak project, estimated cost $2 billion, in February.

Cheniere is developing the Sabine Pass LNG terminal in Cameron Parish and the Corpus Christi, Texas, liquefaction project. Sabine Pass is expected to begin producing LNG by the end of the year. The Corpus Christi terminal could begin production in 2018.

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