• Achieved Third Quarter 2021 Average Production of Approximately 29,000 BOPD, Up 26% from Prior Quarter
• Increased Current Average Production1 to Approximately 30,600 BOPD, Highest Since February 2020
• Paid Down Credit Facility Balance To $140 Million

Gran Tierra Energy today announced an operations and financial update. All dollar amounts are in United States dollars and all production volumes are on a working interest before royalties (“WI”) basis and are expressed in barrels (“bbl”) of oil per day (“BOPD”), unless otherwise stated.

Production: Gran Tierra’s average production for various time periods is outlined in the table below:

• As announced on May 17, 2021, a number of blockades across Colombia impacted several key transportation routes, resulting in the temporary shut-in of some of Gran Tierra’s wells and oil fields during the second quarter of 2021.
• The blockades were not directed at Gran Tierra, but caused the Company to temporarily curtail production during May and June 2021. As a result, approximately 597,000 bbl of oil production were deferred during the second quarter of 2021. Gran Tierra does not expect any negative impact on the Company's oil reserves due to this deferral.
• As announced on July 12, 2021, the Colombian government successfully negotiated the end of blockades affecting Gran Tierra’s operations, which allowed the Company to restore its oil production throughout its entire Colombian portfolio. During the third quarter of 2021, Gran Tierra achieved an average production rate of approximately 29,000 BOPD, the Company’s highest average rate since the first quarter of 2020. The Company’s current average production2 is even higher at approximately 30,600 BOPD.
• Gran’s Tierra’s average production during the third quarter of 2021 was up 26% from the second quarter of 2021 and up 53% from the third quarter of 2020.

Gary Guidry, President and Chief Executive Officer of Gran Tierra, commented: 
“After the challenges with blockades during the second quarter of 2021, we are very proud of how our teams safely and diligently ramped operations back up throughout our Colombia portfolio. During the third quarter of 2021, with production back up to an average level of approximately 29,000 BOPD and an average Brent oil price of $73.23/bbl, Gran Tierra was able to further strengthen its balance sheet. The fourth quarter of 2021 is off to an even stronger start with the Company’s average current production2 at approximately 30,600 BOPD and Brent averaging $81.74/bbl, which has allowed us to pay down Gran Tierra’s credit facility balance to $140 million as of October 8, 2021, down $50 million from a balance of $190 million as of December 31, 2020.

With production restored, a successful 2021 drilling program, strong world oil prices and a strengthened balance sheet, we are very excited about the fourth quarter of 2021 and all of 2022.”

Operations Update

Acordionero Oil Field (100% WI) 

• When necessary, a workover rig was deployed during the third quarter of 2021 to restore existing wells to production if they went offline.
• Gran Tierra believes its prudent reservoir management of Acordionero’s waterflood has allowed the Company to restore this field’s production to an average level of 14,427 BOPD in the third quarter of 2021, up 49% from one year ago, and the highest quarterly average production since the fourth quarter of 2019.
• Acordionero’s current average production2 is 14,849 BOPD.

Costayaco Oil Field (100% WI) 

• In March 2021, Gran Tierra commenced its infill development drilling campaign to drill 3 oil producers; this drilling program was the first in Costayaco since November 2019.
• The CYC-42 and CYC-43 infill oil wells were drilled during March and April of 2021 and the CYC-44 infill oil well was drilled in late April 2021.
• All three of these successful new oil wells started production during the third quarter of 2021 and drove a significant increase in Costayaco’s average production to 6,292 BOPD during the third quarter of 2021, up 50% from 4,190 BOPD in the first quarter of 2021.
• Costayaco’s current average production2 is even higher at 7,144 BOPD.

Moqueta Oil Field (100% WI) 

• During the third quarter of 2021, Gran Tierra completed a budgeted workover program that was designed to optimize Moqueta’s waterflood, which may potentially increase the field’s ultimate oil recovery.

Suroriente Block (52% WI and Operator) 

• At the Cohembi oil field in the Suroriente Block, a facility expansion program is progressing, which is expected to allow additional production to be brought online in the fourth quarter of 2021.
• During the third quarter of 2021, a workover rig was deployed to run larger pumps in some oil wells.
• The Suroriente Block’s average WI production during the third quarter of 2021 was 3,513 BOPD, the highest average WI quarterly rate since the fourth quarter of 2019.
• Suroriente’s current average production is even higher at 4,189 BOPD.

KeyFacts Energy: Gran Tierra Colombia country profile