BRIEF-Canadian Natural Resources gives update on Horizon Oil Sands

Oct 3 (Reuters) - Canadian Natural Resources Ltd :

* Horizon update

* Entered into a long term gas processing agreement with a North American

infrastructure company

* Says Williams Energy Canada will invest approximately $500 million to $600

million

* Previously planned maintenance at Horizon originally scheduled for late Q3

has been shifted into October

* In exchange for NGLS and olefins transferred to Williams, will get methane in

return

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