Exco bought the 9600 net Haynesville acres from Chesapeake Energy for $288 million in a deal that closed in July. Current daily production on those assets is around 114 million cubic feet of natural gas.

Exco formally offered BG the stake that same month and had expected the UK firm to take it.

With BG backing out, Exco chief executive Douglas Miller said the Dallas-based company "will be able to fully benefit from the Haynesville assets' strong base production and additional drilling inventory with upside development opportunities”.

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