Sept 28 (Reuters) - Origin Energy Ltd ORG.AX
* Origin agrees to sell Lattice Energy for $1,585 million
* Proceeds from sale will be used to pay down debt, putting origin on track to reduce adjusted net debt to below $7 billion by 30 june 2018
* Entered agreement to sell Lattice Energy, to Beach Energy for $1,585 million
* Secured access to a significant portion of Lattice Energy's future east coast gas production under long-term gas supply agreements
* As part of sale, co entered into agreements with Lattice Energy to secure access to long-term gas supply
* Entered into supply agreements for lpg production from Bassgas And Otway, which will continue to supply Origin's Lpg Business