Jan 21 (Reuters) - Gran Tierra Energy Inc GTE.TO :
* Announces 2015 year-end reserves and combined pro forma reserves and
resources
* Year-end 2015 proved reserves increased 7,251 thousand barrels of oil
equivalent from year-end 2014
* Says annual production for 2015 averaged 23,401 company interest barrels of
oil equivalent per day
* Source text for Eikon
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