...Production is still concentrated in Colombia, and reserves remain below those of '##' rated peers.Gran Tierra Energy Inc.'s (GTE's) output mostly comes from Colombia, at its Acordionero, Costayaco, Moqueta, and Suroriente fields, which represent approximately 81% of total production. As of Dec. 31, 2019, GTE's 1P reserves reached 79 million barrels of oil equivalent (boe) and its 2P reserves 142 million boe, which remain below of industry peers such as Whiting Petroleum Corp. (##-/Stable/--) with 1P reserves of 520 million boe. We don't expect GTE to diminish its geographic concentration in the next 24 months. However, in the long term, the company could increase its reserves from the expansion of output at the Acordionero field and the drilling activities in Ecuador in 2020 and beyond....