Aug 7 (Reuters) - Enerplus Corp ERF.TO :
* Says Q2 FFO shr $0.78
* Announces strong second quarter 2015 results
* Says qtrly production volumes grew by 7% quarter over quarter to 107,429 boe per day
* Says increasing average annual production guidance range to 100,000 - 104,000 boe per day from 97,000 - 103,000 boe per day
* Says expect approximately 44,000 - 46,000 barrels per day of crude oil and natural gas liquids in fy
* Says expect to bring up to 10 additional net wells on-stream during the second half of the year
* Says increasing 2015 production guidance and reducing operating and g&a expense guidance
* Says decreasing annual operating cost guidance to $9.25 per boe from $9.75 per boe
* Source text for Eikon ID:nCNWJq91ya
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