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FINANCIALLY STRONG DISCIPLINED APPROACH VALUE DRIVEN Corporate Presentation July 2016 1 Disclaimer General Advisory The information contained in this presentation does not purport to be all-inclusive or contain all information that readers


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FINANCIALLY STRONG DISCIPLINED APPROACH VALUE DRIVEN

Corporate Presentation – July 2016

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Disclaimer

General Advisory The information contained in this presentation does not purport to be all-inclusive or contain all information that readers may require. You are encouraged to conduct your own analysis and review of Gran Tierra Energy Inc. (“Gran Tierra”, “GTE”, or the “Company”) and of the information contained in this presentation. Without limitation, you should read the entire record of publicly filed documents relating to the Company, consider the advice of their financial, legal, accounting, tax and other professional advisors and such other factors you consider appropriate in investigating and analyzing the Company. You should rely only on the information provided by the Company and is not entitled to rely on parts of that information to the exclusion of others. The Company has not authorized anyone to provide you with additional or different information, and any such information, including statements in media articles about Gran Tierra, should not be relied upon. In this presentation, unless otherwise indicated, all dollar amounts are expressed in U.S. dollars. An investment in the securities of Gran Tierra is speculative and involves a high degree of risk that should be considered by potential purchasers. Gran Tierra’s business is subject to the risks normally encountered in the oil and gas industry and, more specifically, and certain other risks that are associated with Gran Tierra’s current stage of development. An investment in the Company’s securities is suitable only for those purchasers who are willing to risk a loss of some or all of their investment and who can afford to lose some or all of their investment. You should carefully consider the risks described under the heading “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015 and in the Company’s subsequent SEC filings. This presentation contains disclosure respecting contingent and prospective resources. Please see the appendices to this presentation for important advisories relating to our contingent and prospective resources disclosure. Forward-Looking Information Advisory This presentation contains forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and financial outlook and forward looking information within the meaning of applicable Canadian securities laws (collectively, “forward-looking statements”). Such forward-looking statements include, but are not limited to, statements about: future projected or target production and the growth of production including the product mix of such production and expectations respecting production growth; our ability to grow in both the near and long term and the funding of our growth

  • pportunities; our possible creation of new core areas; our prospects and leads; anticipated rationalization of our portfolio and strategies for maximizing value for our assets in Peru and Brazil;
  • ur pursuit of opportunities in Mexico; forecasted funds flow from operations; the plans, objectives, expectations and intentions of the company regarding production, exploration and

exploration upside, drilling, permitting, testing and development; Gran Tierra’s 2016 capital program including the changes thereto along with the expected costs and the allocation of the capital program; Gran Tierra’s financial position and the future development of the company’s business. Statements respecting reserves, contingent resources, and prospective resources are forward-looking statements as they involve the implied assessment, based on estimates and assumptions, that the reserves, contingent resources, and prospective resources described exist in the quantities predicted or estimated and can be profitably produced in the future. Estimates of future production may be considered to be future-oriented financial information or a financial outlook for the purposes of applicable Canadian securities laws. Financial outlook and future-oriented financial information contained in this presentation about prospective financial performance, financial position or cash flows are based on assumptions about future events, including economic conditions and proposed courses of action, based on management’s assessment of the relevant information currently available, and to become available in the future. In particular, this presentation contains projected operational information for 2016. These projections contain forward-looking statements and are based on a number of material assumptions and factors set out above. Actual results may differ significantly from the projections presented herein. These projections may also be considered to contain future-oriented financial information or a financial outlook. The actual results of Gran Tierra’s operations for any period will likely vary from the amounts set forth in these projections, and such variations may be material. See above for a discussion of the risks that could cause actual results to vary. The future-oriented financial information and financial outlooks contained in this presentation have been approved by management as of the date of this presentation. Readers are cautioned that any such financial outlook and future-oriented financial information contained herein should not be used for purposes other than those for which it is disclosed herein. The Company and its management believe that the prospective financial information has been prepared on a reasonable basis, reflecting management’s best estimates and judgments, and represent, to the best of management’s knowledge and opinion, the Company’s expected course of action. However, because this information is highly subjective, it should not be relied on as necessarily indicative of future results. The forward-looking statements contained in this presentation are based on certain assumptions made by Gran Tierra based on management’s experience and perception of historical trends, current conditions, anticipated future development and other factors believed to be appropriate. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond Gran Tierra’s control, which may cause actual results to differ materially from those implied or expressed by the forward-looking statements. These include the factors discussed or referenced under the heading “Part 1. Item 1A. Risk Factors” in Gran Tierra’s 2015 Annual Report on Form 10-K, under the heading “Part II. Item 1A. Risk Factors” in Gran Tierra’s Quarterly Reports on Form 10-Q and in the other reports and filings with the Securities and Exchange Commission. All forward-looking statements speak only as of the date on which such statements are made, and Gran Tierra undertakes no obligation to correct or update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law. Gran Tierra’s forward-looking statements are expressly qualified in their entirety by this cautionary statement.

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CONTENTS

  • 1. Introduction to Gran Tierra
  • 2. Acquisition of PetroLatina
  • 3. Financial Overview
  • 4. Marketing and Transportation
  • 5. Asset Management
  • 6. Exploration
  • 7. Summary
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  • 1. Introduction to Gran Tierra
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WHY INVEST IN GRAN TIERRA

STRONG FINANCIAL POSITION & SIGNIFICANT FUNDS FLOW FROM OPERATIONS (PRE-PETROLATINA ACQUISITION), WITH LOW DECLINE BASE PRODUCTION

 Solid balance sheet; pre-PetroLatina acquisition, as at May 31, 2016, $194 million in estimated working capital and

$185 million undrawn credit facility, for total liquidity of $379 million

 10,000 bopd of oil hedged for next 12 months via put spread at $35-45-65/bbl  Based on oil current prices, Gran Tierra expects to be self-financing & sustainable  Current producing assets expected to generate free cash flow to fund exploration program for at least next 5 years

RECENTLY ANNOUNCED ACCRETIVE, TRANSFORMATIONAL PETROLATINA TRANSACTION THAT PROVIDES PRODUCTION GROWTH OVER NEXT THREE YEARS

 Accretive across key metrics (reserves, production, cash flow and reserve engineering NPV)  Increases W.I. 2P reserves by 53 million bbls (+70 percent)(1)  Increases W.I. 3P reserves by 98 million bbls (+102 percent)(1)  Provides new growth platform in the Middle Magdalena Basin  Forecasted operating costs of $8.50 to $10.00 per bbl over next 3 years(1)  Forecasted 2017 2P operating netbacks at >$30.00 per bbl at $56/bbl Brent(1)  2P full cycle acquisition and development costs of less than $15.00 per bbl(1)

1 2

1) See endnotes.

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WHY INVEST IN GRAN TIERRA

POTENTIAL TO TRIPLE VALUE OF COMPANY OVER NEXT 3-5 YEARS THROUGH GRAN TIERRA’S EXPLORATION PORTFOLIO (PRE-PETROLATINA ACQUISITION)

 ~ 1.1 million gross acres (0.8 million net) of land in highly prospective and underexplored Putumayo basin  Dominant position in emerging N-sands oil play fairway  Technically focused team, applying latest technology in Colombia  165,625 km of 2D seismic and 28,315 km2 of 3D in Colombia, 14,724 km of 2D and 1,342 km2 of 3D in Putumayo basin  54 prospects identified on 2D and 3D seismic with W.I. unrisked mean prospective resources of 694 MMBOE(1)

TOP PERFORMING OPERATING AND ASSET MANAGEMENT TEAMS IN COLOMBIA AND CALGARY

 Reduced drilling times by ~45% and drilling costs by ~35% by restructuring team and applying best in class practices;

improvements in drilling are expected to significantly reduce costs for future exploration and development programs

 Technically driven asset management team with strong focus on applying best in class technology

SIGNIFICANT PIPELINE AND TRUCKING CAPACITY TO ENSURE PRODUCTION CAN BE MONETIZED AT WORLD OIL PRICES

 ~280,000 bopd(2) of spare capacity exists on OCP pipeline (Ecuador) and ~25,000 bopd(3) on OTA pipeline (Colombia)  Ample trucks are available in country to truck oil  Company recently restructured marketing team and have seen pricing improvements of up to $2.50/bbl

3 4 5

1, 2, 3) See endnotes.

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Gary Guidry – President & CEO

Professional Engineer (P. Eng.) registered with APEGA with more than 35 years of experience. Before Gran Tierra, was President and CEO of Caracal Energy, Orion Oil & Gas, and Tanganyika Oil.

Ryan Ellson – Chief Financial Officer

Chartered Accountant with over 15 years experience. Prior to Gran Tierra, was Head of Finance at Glencore E&P Canada, and prior thereto was VP Finance at Caracal Energy.

Jim Evans – VP Corporate Services

Over 25 years experience, most recently Head of Corporate Services at Glencore E&P Canada, and prior thereto with Caracal Energy.

David Hardy – VP Legal & General Counsel

Over 25 years in legal profession; 15 years focused globally on new ventures and international energy projects. Prior to Gran Tierra, held senior legal, regulatory and commercial negotiation positions with Encana.

Alan Johnson – VP Asset Management

Over 20 years experience, most recently as Head of Asset Management, Glencore E&P Canada, and prior thereto with Caracal Energy.Held various senior positions previously with companies operating internationally.

Lawrence West – VP Exploration

Over 25 years experience, most recently as VP Exploration at Caracal Energy, and prior thereto held several management and executive positions focused in Western Canada.

Adrian Coral – President, Gran Tierra Energy Colombia

Over 15 years experience, most recently as Senior Operations Manager at Gran Tierra Energy Colombia prior to his promotion to President.

MANAGEMENT TEAM BOARD OF DIRECTORS

Gary Guidry – President & CEO Robert Hodgins – Non-Executive Chairman

Chartered accountant, investor and director with 30+ years of oil and gas industry experience. Former Chairman of the Board of Caracal Energy.

Peter Dey – Independent

  • Mr. Dey has 30+ years experience as a corporate lawyer, investment

banker and corporate director known for his corporate governance

  • expertise. Former Director of Caracal Energy.

Evan Hazell – Independent

Experience in the global oil and gas industry for 30+ years, initially as a petroleum engineer and then as an investment banker.

Ronald W. Royal – Independent

Professional engineer with 35+ years of international upstream experience with Imperial Oil Limited and Exxon affiliates. Former Director of Caracal.

David Smith – Independent

Chartered Financial Analyst with 20+ years experience in investment banking, research and management.

Brooke Wade – Independent

President of Wade Capital Corporation, a private investment company. Currently serves on various boards. Formerly Director of Caracal.

SIGNIFICANT EXPERIENCE, PROVEN TRACK RECORD

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Market Statistics Pre-PetroLatina Acquisition Pro Forma PetroLatina Symbol (NYSE MKT, TSX) GTE Share Price (at close July 11, 2016), NYSE MKT US$ 2.89 Daily Trading, 30-day Ave Volume, NYSE MKT/TSX 1.25 MM / 2.15 MM Basic Shares/Fully Diluted Shares 296.2MM/345.1 MM1 354.0MM/402.9 MM2 Market Capitalization (Basic Shares Only) US$ 856 MM US$ 1,023 MM Enterprise Value (Basic Shares Only) US$ 777 MM3 US$ 944 MM4 2016 Production, 2015 YE Pro Forma Reserves & NAV 10% Before Tax W.I. Proved (1P) Reserves 53.0 MMBOE5 73.9 MMBOE6 W.I. Proved + Probable (2P) Reserves 76.2 MMBOE5 129.0 MMBOE6 W.I. Proved + Probable + Possible (3P) Reserves 96.0 MMBOE5 194.2 MMBOE6 W.I. 1P NAV 10% Before Tax US$ 917 MM55,7,8 US$ 974 MM5,6,7,8 W.I. 2P NAV 10% Before Tax US$ 1,286 MM5,7,8 US$ 1,924 MM5,6,7,8 W.I. 3P NAV 10% Before Tax US$ 1,663 MM5,7,8 US$ 3,082 MM5,6,7,8

1) As at Mar.31, 2016, Fully Diluted Shares(345.1MM) = Basic Shares (296.2 MM) + Stock Options (13.1MM) + Convertible Notes (35.8MM), but excludes RSU’s/PSU’s/DSU’s (3.0MM) 2) As at Mar.31, 2016, Fully Diluted Shares(402.9MM) = Fully Diluted Shares Pre-PetroLatina Acquisition (345.1 MM) + Subscription Receipts for PetroLatina Acquisition (57.8MM) 3, 4, 5, 6,7,8) See endnotes.

Highly liquid stock (NYSE & TSX), underpinned by solid Net Asset Value (NAV), low decline production and strong cash flow generation

COMPANY SNAPSHOT

Pro-Forma 2P Gross W.I. Asset Value Before Tax, 10% Discount Rate (US$MM)

459 367 274 131 990

Costayaco Moqueta Other Colombia & Brazil PTA and PGC PetroLatina

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COLOMBIA

Discovered Resources

Grow / maintain existing production in Costayaco and Moqueta through EOR and development drilling

Appraise and develop newly acquired fields, including the large Acordionero oil field

Continue to optimize development and operating cost structures

Undiscovered Resources

High graded exciting exploration portfolio

Accelerating N-Sand exploration & development in Putumayo Basin

Pro forma combined W.I. Mean Unrisked Prospective Resources

  • f 694 MMBOE in Colombia 1

New Inventory

Continue evaluation of acquisition and farm-in opportunities

Expand into other basins within Colombia and diversify product streams with a focus on value creation

Currently limited competition for assets in Colombia

CORPORATE STRATEGY

1) See endnotes.

Grow Net Asset Value per share by 3-5x within 5 years

BRAZIL/PERU

Maximize Value of Brazil and Peru

Brazil: harvest free cash flow from Tiê field

Peru: assess various strategic options - Sale, farm-out and SpinCo being considered

MEXICO

Longer Term Growth Strategy

Positioning for Mexico option

Evaluate conventional onshore development, EOR and low risk exploration opportunities

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  • 2. Acquisition of PetroLatina
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EXECUTING OUR STRATEGY - TRANSACTION RATIONALE

1

Scale

  • Addition of significant 2P reserves (+70%)
  • Material step-up in production and sustainable production growth
  • Become the largest listed, independent Colombian focused E&P (by reserves and

resources)

2

Platform For Growth

  • Provides new growth platform in Middle Magdalena Basin
  • Long term free cash flow generation to fund further expansion across enlarged

Gran Tierra Colombian portfolio

3

Diversifies Portfolio

  • Establishes Gran Tierra with core operations in the Putumayo and Middle

Magdalena

  • Leverage to oil price recovery; three large producing oil fields

4

Highly Accretive

  • Accretive across key metrics (Reserves, Production, Cash Flow and Reserve

Engineer NPV)

  • Operational synergies and efficiencies
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2P Reserves

US$9.9/bbl

3P Reserves

US$5.4/bbl

H2 2016 Production (2P, Pre Royalties)

US$97,200/bbl/d

2017 Production (2P, Pre Royalties)

US$61,000/bbl/d

2018 Production (2P, Pre Royalties)

US$35,500/bbl/d

H2 2016 Operating Netback Multiple (2P)(2)(4)(5)

9.1x

2017 Operating Netback Multiple (2P)(2)(4)

5.5x

2018 Operating Netback Multiple (2P)(2)(4)

2.7x

Transformational deal that provides production growth over the next three years and establishes GTE in the Middle Magdalena Basin

ACQUISITION SUMMARY

TRANSACTION SUMMARY

Gran Tierra, PetroLatina Energy Limited (“PetroLatina”) and certain key shareholders of PetroLatina signed a share purchase agreement for the acquisition of all of the shares of PetroLatina for cash consideration of US$525mm (the “Transaction”)

  • US$500mm at closing; US$25mm payment prior to

December 31, 2016

  • Funded through a combination of US$130mm new debt, equity

private placement of US$173.5mm and Gran Tierra’s existing cash and credit facilities

 PetroLatina is a private, independent E&P company with assets primarily in the Middle Magdalena Basin, Colombia

  • 2P Reserves of 53mmbbl(1)
  • 2016 production of 5mbbl/d, ramping up to 15mbbl/d in 2018(1)
  • Provides clear production growth over the next three years

Purchase Price

US$525mm

2P Reserves(1)

53mmbbl

3P Reserves(1)

98mmbbl

H2 2016 Production (2P, Pre Royalties)(1)

5mbbl/d

2017 Production (2P, Pre Royalties)(1)

9mbbl/d

2018 Production (2P, Pre Royalties)(1)

15mbbl/d

Reserve Engineer pre-tax NPV10 (2P)(1)

US$990mm

H2 2016 Operating Netback (2P)(2)

US$29/bbl

2017 Operating Netback (2P)(2)

US$31/bbl

2018 Operating Netback (2P)(2)

US$36/bbl

2016-2018 Capital Expenditure (2P)(1)

US$185mm

ACQUISITION METRICS(3)

(1) Reserves, production, NPV10, operating netbacks and capital expenditures based on independent reserves evaluation, effective December 31, 2015 completed by McDaniel & Associates Ltd. (“McDaniel”) in accordance with Canadian National Instrument 51-101 - Standards for Oil and Gas Activities (“NI 51-101”) and the Canadian Oil and Gas Evaluation Handbook (“COGEH”) (the “McDaniel All Fields Evaluation”) (2) Based on the McDaniel All Fields Evaluation. Operating netbacks per barrel calculated as oil sales net of royalties, less operating costs, divided by annual working interest (“WI”) production before royalties; McDaniel January 1, 2016 Brent price deck: US$47.5/bbl 2016, US$56.2/bbl 2017, US$65.0/bbl 2018;
  • perating netback is a non-GAAP measure and does not have a standardized meaning under generally accepted accounting principles (“GAAP”) in the
United States of America. (3) Acquisition metrics calculated based on purchase price of US$525mm (4) Operating netback multiples calculated as purchase price divided by operating netback; (5) Annualized
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Private, independent E&P company with assets primarily in the Middle Magdalena Basin, Colombia(1)

  • 100% interest in and operator of Acordionero oil field (Midas)
  • 4 production blocks: Midas, La Paloma, Tisquirama A&B
  • 6 exploration blocks: VMM-28, PUT 4&25, LLA 1, 53, 70

Significant 2P Reserves of ~53mmbbl; 100% oil(2)

  • Acquisition increases Gran Tierra 2P reserves by 70%,

significantly increasing production development opportunities in the next 1-3 years. Additional prospective upside including unconventional potential

Expected working interest production of 5mbbl/d in 2016, ramping up to 15mbbl/d in 2018(2)

  • Combined company work program is expected to be self-funding
(1) Colombian regulator’s approval for closing of acquisition required because of change in control provisions in contracts for 4 exploration blocks (2) Based on the McDaniel All Fields Evaluation; ~47mmbbl or ~89% attributable to Acordionero

COMPANY OVERVIEW ASSET MAP

PETROLATINA OVERVIEW

Minor Fields Acordionero Working Interest Reserves(2) (mmbbl) 18 47 90 3 6 8 21 53 98 1P Reserves 2P Reserves 3P Reserves

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Acordionero is a conventional oil field with oil trapped in 2 formations and 4 way structural closure

  • Lisama A Sand: heavy oil (14◦ API); horizontal wells
  • Lisama C/D Sands: medium oil (26◦ API); vertical wells, some existing wells to be

worked over

25 planned wells(1)

  • 20 producers (4 existing to be recompleted), 5 injectors

Development capex of US$181mm (95% in next three years); almost entirely self-financing(1)

Low opex and price differentials result in attractive netbacks.

Working Interest Reserves(1) (mmbbl)

C/D Sands Recovery 17.5% 25.0% 35.0% A Sands Recovery 12.5% 17.5% 25.0%

C/D Sands A Sands

ASSET OVERVIEW ACORDIONERO PRODUCTION (2P)(1)

ACORDIONERO (100% WI)

ACORDIONERO FREE CASH FLOW (2P)(1)(2)

13 34 65 4 13 25 18 47 90 1P Reserves 2P Reserves 3P Reserves

(Pre-Royalties)

(1) Based on the McDaniel All Fields Evaluation (2) McDaniel Brent price deck: $47.5/bbl 2016, $56.2/bbl 2017, $65.0/bbl 2018, $71.7/bbl 2019, $75.8/bbl 2020, $80.1/bbl 2021, $84.4/bbl 2022, $89.1/bbl 2023, inflated thereafter at 2% p.a.; Free cash flow is a non-GAAP measure and does not have a standardized meaning under GAAP. Free Cash Flow is oil and gas sales after royalties and high price fee less operating and income tax expenses and capital and abandonment costs

4.6 7.7 13.5 15.1 14.4 13.2 11.5 9.6 7.9 6.5 5.3 4.4 3.6 3.0 2.4

  • 5

10 15 20 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 mbbl/d

18 (34) 51 151 155 148 131 111 90 73 58 45 34 26 18

(100) (50)

  • 50

100 150 200 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 US$mm

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15 28 32 27 5 9 15 33 41 42

  • 10

20 30 40 50 2016 2017 2018 mboe/d 53 76 96 21 53 98 74 129 194

  • 40

80 120 160 200 1P Reserves 2P Reserves 3P Reserves mmboe

Gran Tierra PetroLatina Gran Tierra Pro-Forma

(Excl. Synergies)

Accretion(3)

(Per Share)

Reserves(2)

(mmboe)

2P

76 53 129 +42.1%

3P

96 98 194 +69.2%

Production(1)

(mboe/d)

2017

32 9 41 +7.3%

2018

27 15 42 +30.2%

Operating Cash Flow(2)(4)

(US$mm)

2017

188 67 255 +13.6%

2018

190 128 318 +40.1%

Reserve Engineers Valuation (Pre-tax)(2)(5)

(US$mm)

2P

1,286 990 1,924 +25.2%

3P

1,663 1,771 3,082 +55.2%

GRAN TIERRA POST TRANSACTION

PRO-FORMA PRODUCTION(1) TRANSACTION METRICS PRO-FORMA RESERVES(2)

40% 70% 102% Gran Tierra PetroLatina

(1) Gran Tierra 2016 production based on mid-point of the latest company guidance WI production before royalties; Gran Tierra 2017 and 2018 WI production before royalties based on independent reserves evaluation, effective December 31, 2015 completed by McDaniel for all Gran Tierra properties in accordance with NI 51-101 and COGEH (the “McDaniel Gran Tierra Report”); PetroLatina WI production before royalties based on the McDaniel All Fields Evaluation (2) Based on the McDaniel Gran Tierra Report and McDaniel All Fields Evaluation (3) Based on US$525mm purchase price, US$173mm proceeds from equity private placement and issuance price of US$3.00/share (4) Operating Cash Flows calculated as oil and gas sales net after royalty, less operating, general and administrative (“G&A”), and income tax expenses; assumes G&A expenses of US$30mm in 2017 and 2018; under McDaniel Brent price deck: US$47.5/bbl 2016, US$56.2/bbl 2017 and US$65.0/bbl 2018 (5) Assumes 10% discount rate & valuation date of 1 January 2016; Gran Tierra value-adjusted to include US$170mm of cash & current restricted cash as at May 31, 2016; pro forma valuation adjusted for transaction consideration paid from working capital & debt facilities ($160mm cash + $62mm credit facility + $130mm debt)

18% 28% 56%

(Pre-Royalties)

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Upfront Payment $500mm New Debt $130mm Deferred Payment $25mm New Equity Proceeds $173mm Existing Cash $160mm RBL Debt $62mm Acquisition Cost Funding

FUNDING FRAMEWORK

FUNDING THE ACQUISITION 2016 CAPITAL PROGRAM

(US$mm)

2016 Capital Expenditure Gran Tierra(2) 140 – 150 PetroLatina(2) 11 Gran Tierra Pro-Forma 151 – 161 

PetroLatina’s capital program in 2016 and over the next three years will be focused on the development of the Acordionero field

Gran Tierra expects the combined company capital requirements over the next three years to be met with

  • perating cash flows in the current commodity price

environment

(1) As at May 31, 2016 (2) 2016 Gran Tierra capex based on company guidance, includes exploration; PetroLatina capex based on the McDaniel All Fields Evaluation and excludes exploration spend

(1) All values in US Dollars

NEW DEBT

US$130mm debt facility

Tenor: one year

Flexible repayment allows for multiple longer term financing

  • ptions
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PRO FORMA VALUE

NET ASSET VALUE (BEFORE TAX, 10% DISCOUNT RATE) – US$ MILLION3

(1) Based on number of shares outstanding pre-equity raise (296.2 million) (2) Based on number of shares outstanding post-equity raise (354.0 million); 3,4,5) See Endnotes.

(1) (1) (2) (2) (5) (5) (4)

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  • 3. Financial Overview
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FINANCIAL STRENGTH (PRE-PETROLATINA ACQUISITION)

1) As at May 31, 2016, cash of $163.3 million and current restricted cash of $6.6 million; 2) As at May 31, 2016; 3) Undrawn credit facility has borrowing base of $185 million, with $160 million readily available and $25 million subject to the consent of all lenders.

POSITIONED TO EXECUTE OUR STRATEGY – Strong cash position, cash flow & borrowing capacity CASH & CURRENT RESTRICTED CASH1 WORKING CAPITAL1 UNDRAWN CREDIT FACILITY3 TOTAL LIQUIDITY

170 MILLION 194 MILLION 185 MILLION 379 MILLION

US$ US$ US$ US$ PROTECTION FROM OIL PRICE DOWNSIDE – Hedging program PERIOD HEDGED SOLD VOLUME SOLD PUT BOUGHT PUT SOLD CALL PREMIUM 1 JUNE 2016 – 31 MAY 2017 10,000 BOPD US$35/bbl US$45/bbl US$65/bbl US$1.25/bbl

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2016 WORK PROGRAM (US$) (PRE-PETROLATINA ACQUISITION)

ORIGINAL BASE CAPITAL PROGRAM ADDITIONAL EXPLORATION CAPITAL

Chaza Block $ 50 MM Colombia Exploration $ 33-43 MM

  • 2 gross water injection wells at Costayaco
  • Drill 2 additional gross exploration wells
  • 3 gross development wells at Moqueta

(PUT-4: Siriri-1 [N-Sands]; El Porton: Crypto-1)

  • Facilities work (water injection and tie-ins)
  • Acquire additional 2D seismic

Brazil 8 MM

  • Additional lease construction/EIA work

Non-Operated Blocks in Colombia 6 MM (in preparation for 2017 exploration) TOTAL MAINTENANCE CAPITAL $ 64 MM Peru 6 MM Abandonments, business unit overhead, corporate allocations 17 MM EXPLORATION: PUT-7 Block: 2 N-Sands exploration wells* 20 MM TOTAL ORIGINAL BASE CAPITAL PROGRAM $ 107 MM TOTAL ADDITIONAL EXPLORATION CAPITAL $ 33-43 MM TOTAL REVISED CAPITAL PROGAM $ 140-150 MM * Cumplidor-1 & Alpha-1

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  • 4. Marketing and Transportation
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MARKETING & TRANSPORTATION: CAPTURING VALUE

Restructured marketing function, core competency of Gran Tierra

Gran Tierra has very strong logistics and operations team which safely and efficiently transports barrels

Multiple export routes to monetize Company’s current production without significant variation in Company’s netback

Significant amount of unutilized pipeline capacity in Putumayo to monetize current production and future discoveries

Exploring options to batch Company’s crude on OCP (Ecuador)

Marketing has improved netbacks up to $2.50/bbl through:

  • Expansion of customer base
  • Modification of marketing contracts pricing terms
  • Reallocation of production to optimize export opportunities and improve netbacks
  • Elimination of unused ship or pay contracts and reservation fees
  • Development of new export options
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MULTIPLE EXPORT ROUTES

1, 2) See endnotes.

Rubiales Apiay Tenay Vasconia Cusiana Araguaney

Orito

Coveñas Tumaco Esmeraldas

OAM

Colombia Ecuador

OSLA OCU & OUS

Cartagena Barranquilla Babillas Barranca Lorda Pumping Station Shipping Port GTE Asset

50 100 150

Municipal Area Trucking Terminal Barge Operation Bogotá Truck route to Babillas offloading station on the OAM Truck route to Barranquilla blending tanks Truck route to Amazonas station, OCP

Multiple options to monetize crude

  • il production

Netbacks vary by route, however pipeline tariffs are paid in US$ and trucking costs are paid in Colombian Pesos; sales netback after transportation on Costayaco & Moqueta production varies by less than $4.00/bbl depending on route

Significant pipeline capacity in the Putumayo to sell both current production plus development of future exploration discoveries

  • OCP (Ecuador) has spare

capacity of ~280,000 bopd1; GTE in discussion with OCP about batching oil production to potentially further increase netbacks

  • OTA (Colombia) has spare

capacity of ~25,000 bopd2

slide-24
SLIDE 24

24

  • 5. Asset Management
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SLIDE 25

25

COLOMBIA - COSTAYACO OVERVIEW

Cab T T + Cab U+T+Cab Injectors Field Production (May 1st , 2016)

  • Oil: 12,368 bopd
  • Water: 21,839 bwpd (63.8% w/c)
  • GOR: 148 scf/stb
  • Water Injection: 27,869 bwpd

REMAINING RECOVERABLE RESERVES1 Kg Sand, U Sand, T Sand, Caballos (McDaniel @ Dec 31, 2015) Cum Production Rem 1P Developed Rem Total 1P Rem Total 2P Rem Total 3P

(MMBBLS) (MMBBLS) (MMBBLS) (MMBBLS) (MMBBLS)

42.8 21.8 23.1 27.7 32.9 FULL CYCLE COSTS D&C CAPEX Facilities CAPEX Other CAPEX Total CAPEX F&D (2P)2

($MM) ($MM) ($MM) ($MM) ($/BBL)

Full Cycle 235.9 99.9 8.1 343.9 4.9 1,2) See endnotes.

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26

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0 500 1,000 1,500 2,000 2,500 5 10 15 Cumulative Oil (MMbbl), WaterCut (%) Oil Rate (bopd) Time (Years) Oil Rate Cumulative Oil Watercut

COSTAYACO TYPE WELL1

Caballos+T Sand

Watercut 100%

1) Average of all Costayaco wells’ daily oil production, cumulative oil production and watercut histories set to common start time

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27

COSTAYACO RESERVOIR SIMULATION

500 1000 1500 2000 2500 3000 3500 4000 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

Pressure (PSI)

COSTAYACO FIELD - PRESSURE MATCH T SS (PSIA) Kc SS (PSIA) T SS Obs Kc SS Obs

 Model updated to May 1st 2016, including production from new wells (CYC-23i and CYC-27i)  Good oil, water and pressure history match on a field basis allows us to accurately predict production,

  • ptimize operations, and target remaining reserves

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 5,000 10,000 15,000 20,000 25,000 2007 2008 2009 2010 2011 2012 2013 2014 2015 WCT (%)

Oil Rate (BOPD)

COSTAYACO FIELD – FLUID HISTORY MATCH Qo Observed (BOPD) Qo (BOPD) WCT observed (Fraction) WCT (Fraction)

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28

Field Production (May 1st , 2016)

  • Oil: 7,351 bopd
  • Water: 1,778 bwpd (19.5% w/c)
  • GOR: 308 scf/stb
  • Water Injection: 9,285 bwpd

MOQUETA OVERVIEW

Cab Monitors T + Cab Suspended Injectors

MQT 7 MQT 10 MQT 23 ZPT 1 MQT 12 MQT 13 MQT 1 MQT 2 MQT 14 MQT 3 MQT 4 MQT 5 MQT 6 MQT 8 MQT 11 MQT 15 MQT 16 MQT 17 MQT 19 MQT 21 MQT 22 MQT 20

REMAINING RECOVERABLE RESERVES1 U Sand, T Sand, Caballos (McDaniel @ Dec 31, 2015) Cum Production Rem 1P Developed Rem Total 1P Rem Total 2P Rem Total 3P

(MMBBLS) (MMBBLS) (MMBBLS) (MMBBLS) (MMBBLS)

6.6 9.6 14.4 21.9 27.1 FULL CYCLE COSTS D&C CAPEX Facilities CAPEX Other CAPEX Total CAPEX F&D (2P)2

($MM) ($MM) ($MM) ($MM) ($/BBL)

Full Cycle 215.3 57.4 18.4 291.1 10.2

Moqueta Wells Drilled 24 Producers 13 Injectors 4 Suspended 4 Monitors 2 Abandoned 1

1,2) See endnotes.

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29

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 100 200 300 400 500 600 5 10 15 20 25 Cumulative Oil (MMbbl), WaterCut (%) Oil Rate (bopd) Time (Years) Oil Rate Cumulative Oil Watercut

MOQUETA TYPE WELL

Watercut 100%

Caballos+T Sand

1) Average of all Moqueta wells’ daily oil production, cumulative oil production and watercut histories set to common start time

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30

 Dynamic Model Description

  • Extremely high resolution model (25 x 25 x 1m grid)
  • Single model for all sands/regions of Moqueta –

commingled well production

  • Sliding sleeve operations incorporated with daily

resolution

  • Detailed regional/well by well pressure matching
  • Dynamic fault communication (regional)
  • Updated to May 1st, 2016

 Good history match allows for accurate prediction of

waterflood performance and unswept oil identification

MOQUETA SIMULATION: HISTORY MATCH

1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000

Jun-11 Dec-11 Jul-12 Jan-13 Aug-13 Feb-14 Sep-14 Apr-15 Oct-15

Oil/Water Rate (bpd)

Moqueta - Fluid History Match

Historical Oil Rate Historical Water Rate Simulation Oil Rate Simulation Water Rate

800 1,000 1,200 1,400 1,600 1,800 2,000 2,200

Jun-11 May-12 Jun-13 Jun-14

Pressure (psi) Moqueta West – Regional/Well Pressure Match

MQT-6 T Sand Simulation Historical Well Pressures T Sand South T Sand North - Simulation

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SLIDE 31

31

 GTE has 15.8% non-op working interest in block  In the Putumayo basin on the border with Ecuador  Association contract with Ecopetrol, expires in 2023  Gross WI Reserves (McDaniel year end)1:

  • 1P – 2.8 mmbbl
  • 2P – 5.9 mmbbl
  • 3P – 8.9 mmbbl

 GTE internal reservoir evaluation estimates that 3 producing fields

could be technically capable of producing approx. 9,000 bopd:

 Cohembi (6,500 bopd)  Quinde (1,500 bopd)  Pinuna (1,000 bopd)  Only producing reservoir at Cohembi and Quinde is N sand of

Villeta formation

  • Stratigraphic traps with no natural water drive
  • Oil Density: 18° API Oil
  • Permeability: 1,000+ mD
  • Avg. Reservoir thickness: 20 ft

 Pinuna is a structural trap producing from the Villeta T and U

sands

SURORIENTE BLOCK - LOCATION AND OVERVIEW

BLOCK OVERVIEW RESERVOIR OVERVIEW

1) See endnotes.

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32

FARM-OUT

 Bring in industry / financial partners to fund projects  Carry for exploration and development costs

SALE

 Sale of all assets  Sale of select assets

SPINCO

 Spin-off of Peruvian assets into a separate listed

entity (“SpinCo”)

PORTFOLIO OF OPPORTUNITY

NON-CORE ASSETS IN BRAZIL & PERU

 Brazil harvest plan is now in place:

  • Operating and G&A costs have been significantly reduced
  • Brazil operation fully funded through Brazil funds flow

 Peru costs have been significantly reduced:

  • Carrying costs below US$ 8.0MM per year
  • Option to pay exit penalty of US$ 6.5MM

MANAGEMENT EVALUATING STRATEGIC OPTIONS FOR VALUE MAXIMIZATION:

BRAZIL PERU

Colombia

slide-33
SLIDE 33

33

BRAZIL

GROWING OIL PRODUCTION AND A MATERIAL ACREAGE POSITION

 47,734 gross acres, 100% W.I. in 7 blocks  Recôncavo Basin – located in one of the principal

petroleum provinces of Brazil

 2P gross W.I. reserves in the Tiê field: 9.3

MMBOE¹

 Gross unrisked prospective resources: 45.3

MMBO²

 Crude market trades at international prices  Competitive fiscal regime  Brazil harvest plan is now in place:

  • Operating and G&A costs have been significantly reduced
  • Operation fully funded through Brazil funds flow

GTE BRAZIL OVERVIEW GROSS UNRISKED PROSPECTIVE RESOURCES ACREAGE PORTFOLIO TIÊ FIELD OIL & GAS RESERVES (GROSS W.I.)1

RESERVES CATEGORY

MMBOE (NI 51-101)

Proved 6.0 Probable 3.3 Proved plus Probable 9.3 Possible 2.9 Proved plus Probable plus Possible 12.2 BLOCK GROSS ACRES GTE W.I. COMMENTS REC-T 129 7,241 100%

Force Majeure

REC-T 142 6,856 100%

Force Majeure

REC-T 155 5,787 100%

Force Majeure

REC-T 224 7,192 100%

One Exploration well remaining

REC-T 117 6,795 100%

Two Exploration wells remaining

REC-T 118 7,734 100%

Three Exploration wells remaining

REC-T 86 6,129 100%

To be relinquished Aug.31/2016 BLOCK

  • NO. OF

PROSPECTS MEAN UNRISKED PR (MMBO)²

TOTAL 10 45.3

¹ Based on the independent report prepared by McDaniel as of December 31, 2015, NI 51-101, COGEH and SEC compliant ² GTE internal assessment effective May 31, 2016 and prepared by a member of management who is a qualified reserves evaluator in accordance with NI 51-101 and COGEH

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SLIDE 34

34

 Bretaña Norte 95-2-1XD

  • 99 foot gross (53 foot net) oil column
  • 3,095 bopd natural flow (18.5°API) from horizontal side-track

 Additional exploration potential in Envidia Lobe  Future development area defined and to be retained

within the retention period to facilitate future development scenarios or to provide time for monetization

PERU BLOCK 95

CONTINGENT RESOURCES

BRETAÑA OIL DISCOVERY - Contingent Resources1 GROSS W.I. MMBOE (NI 51-101) P90 Low Estimate Contingent Resources (1C) 34.2 P50 Best Estimate Contingent Resources (2C) 53.0 P10 High Estimate Contingent Resources (3C) 80.9

1) See endnotes.

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SLIDE 35

35 1) See endnotes.

PERU EXPLORATION

 Immediately up-dip and along strike from prolific

producing fields

 New 2D seismic acquired, prospects mapped  Well permitting process underway  Pmean prospective resource estimate of 1,605 MMBOE1,

(W.I., unrisked, 5 prospects)

 New 2D seismic acquired, five new prospects and leads

identified on Block 107

 On trend with prolific hydrocarbon accumulations

  • Camisea to the southeast
  • Recent oil discovery at Los Angeles-1x on Block 131

 Pmean prospective resource estimate of 313 MMBOE1,

(W.I., unrisked, 1 prospect)

BLOCKS 123 AND 129 – Marañon Basin BLOCKS 107 AND 133 - Ucayali Basin

slide-36
SLIDE 36

36

SUMMARY

High quality, light oil assets

  • Mature with infrastructure and drilling capex largely complete
  • Strong cashflow generating assets
  • Application of technology expected to identify further potential upside

Restructured to integrated Asset Management teams

  • World class technical skills which complement existing in-country Operations team
  • Teams are easily scalable as Gran Tierra makes new discoveries & acquisitions

Created Corporate Reservoir Characterization and Modelling team

  • Staffed with geo-modelers, reservoir simulation engineers and petro-physicist
  • All reservoir simulation now done in house

New drilling and completions team

  • Upgraded drilling and completions managers and restructured team
  • Focus on operational excellence and sustainable performance improvements
  • Reduced drilling times by ~45% and drilling costs by ~35%
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SLIDE 37

37

  • 6. Exploration
slide-38
SLIDE 38

38

EXPLORATION STRATEGY

Focus on Colombia

Focus on proven basins

Large prospective resource inventory with diversified plays & prospects

  • Structural prospects in proven basins / stratigraphic “N” sand play in Putumayo Basin
  • Seismically driven “N” sand play amplitude anomalies with > 50% chance of finding sand

Exploration capital expenditures funded by cash flow

Convert prospective resources to reserves

Potential to grow Company 3-5 X through exploration portfolio in five years

slide-39
SLIDE 39

39

P = Prospects; L = Leads 1) EXCLUDES PetroLatina; see endnotes.

MEAN PROSPECTIVE RESOURCES1

slide-40
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40

MCDANIEL PROSPECTIVE RESOURCES YEAR END 2015

Colombia Prospective Resources1 BOE (MMBOE) WI Prospective Resources - Unrisked Risked Resources

Basin Prospects / Leads Low P50 Mean High Mean

Putumayo 45P 114.9 306.6 441.4 921.4 134.8 Llanos 9P & 2L 43.4 104.9 136.2 268.3 28.8 Sinu 4 L 10.6 54.5 104.1 263.7 14.6 Total 54P & 6L 168.9 466.0 681.7 1,453.4 178.2

1) EXCLUDES PetroLatina; see endnotes; P = Prospects; L = Leads

slide-41
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41

PUTUMAYO BASIN “N”- SAND PLAY FAIRWAY1

1) IHS 2015 reference

slide-42
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42

REGIONAL “N” SAND BASIN STATISTICS1

  • 82 wells exploratory wells “structural targets”
  • 47/82 wells encountered N sand reservoir
  • 57.3% chance of encountering N sand in

basin

  • Chance of Success
  • 53% chance of encountering oil saturated N

sand reservoir in the basin by exploration drilling without the aid of seismic amplitude.

  • Using seismic amplitudes, 18 wells have

been drilled in Cohembi and Quinde fields 100% successful in finding “N”sand oil reservoir

PUT1 PUT4 PUT7 SURORIENTE PPN PUT10 PDS CHAZA GUAYUYACO PUT2 PUT31 ALEA 1947C ALEA 1848A

53% Chance of success

43% 4%

1) See endnote

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SLIDE 43

43

REGIONAL “N” SAND PROSPECTS WITHIN PORTFOLIO

 14,724 km of 2D seismic,

1,342 sq.km of 3D seismic in Putumayo basin

slide-44
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44

  • 6. Summary
slide-45
SLIDE 45

45

WHY INVEST IN GRAN TIERRA

STRONG FINANCIAL POSITION & SIGNIFICANT FUNDS FLOW FROM OPERATIONS (PRE-PETROLATINA ACQUISITION) WITH LOW DECLINE BASE PRODUCTION RECENTLY ANNOUNCED ACCRETIVE, TRANSFORMATIONAL PETROLATINA TRANSACTION THAT PROVIDES PRODUCTION GROWTH OVER NEXT THREE YEARS POTENTIAL TO TRIPLE VALUE OF COMPANY OVER NEXT 3 YEARS THROUGH EXPLORATION TOP PERFORMING OPERATING AND ASSET MANAGEMENT TEAMS IN COLOMBIA AND CALGARY SIGNIFICANT PIPELINE AND TRUCKING CAPACITY TO ENSURE PRODUCTION CAN BE MONETIZED AT WORLD OIL PRICES

1 2 3 4 5

slide-46
SLIDE 46

46

Appendix

slide-47
SLIDE 47

47

  • CEO, 3 years
  • CEO, 2 years
  • CEO, 4 years
  • CEO, 2 years
  • SVP and President of AEC International, 5 years
  • President and General Manager - Nigeria, 2 year

385% (7%) (40%) 80% 200% 320% 440% Tanganyika TSX E&P Index 19 25

  • 5

10 15 20 25 30 Jan 2009 Jan 2010 mmboe 25 90

  • 20

40 60 80 100 Sep 2011 Dec 2013 mmboe 105 851

  • 150

300 450 600 750 900 May 2005 Dec 2007 mmboe 127% 20%

  • 40%

80% 120% 160% Orion TSX E&P Index 101% 8%

  • 20%

40% 60% 80% 100% 120% Caracal FTSE 350 E&P

SOLID TRACK RECORD OF VALUE CREATION

Experience Performance Under Management’s Leadership

  • B.Sc. in Petroleum Engineering
  • Member of APEGGA

Shareholder Returns

259% 711% 34%

Average shareholder returns of 45%/year & 2P reserves growth of 79% at prior 4 companies led by Mr. Guidry Awarded Oil Council Executive of the Year in 2014

Gary Guidry Leadership Positions Regional Experience Education

Board Membership

CAGR: 24% Market cap: $1.8bn Prod: 14,000bbl/d Reserves: 180mmboe Market cap: $2.0bn Prod:25,000bbl/d Reserves: 851mmboe Market cap: $320mm Prod: 5,500boe/d Reserves: 25mmboe CAGR: 73% CAGR: 52% CAGR: 34% CAGR: 53% CAGR: 125% (1) (2) (3)

2P Reserve Growth (W.I.)

1, 2, 3) See endnotes. 47

slide-48
SLIDE 48

48

GLOSSARY OF TERMS

bbl: Barrel BNBOE: Billion Barrels of Oil Equivalent BOE: Barrel of Oil Equivalent BOEPD: Barrel of Oil Equivalent per Day bopd: Barrels of Oil per Day bwpd: Barrels of Water per Day CAGR: Compounded Annual Growth CPF: Central Production Facility DD&A: Depreciation, Depletion & Amortization F&D: Finding & Development Cost GOR: Gas Oil Ratio GTE: Gran Tierra Energy Inc. GTEC: Gran Tierra Energy Colombia Inc. LTIF: Lost Time Injury Frequency LTT: Long-term Test MM: Million MMBBLS: Million Barrels MMBO: Million Barrels of Oil MMBOE: Million Barrels of Oil Equivalent MMcf: Million Cubic Feet MMstb: Million Stock Tank Barrels NAR: Net After Royalty NAV: Net Asset Value PUD: Proved Undeveloped Reserves scf: Standard Cubic Foot stb: Stock Tank Barrel Tcf: Trillion Cubic Feet VRR: Voidage Replacement Ratio w/c: Water Cut W.I.: Working Interest

“contingent resources”: quantities of petroleum estimated, at a given date, to be potentially recoverable from known accumulations using established or developing technology, but which are not currently considered to be commercially recoverable due to one or more

  • contingencies. Contingencies are conditions that must be satisfied for a portion of contingent

resources to be classified as reserves that are: (a) specific to project being evaluated; and (b) expected to be resolved within a reasonable timeframe. Contingencies may include factors such as economic, legal, environmental, political and regulatory matters or a lack of markets. It is also appropriate to classify as contingent resources estimated discovered recoverable quantities associated with a project in early evaluation stage. “gross” means: (a) in relation to Company’s interest in production, reserves, contingent resources or prospective resources, its “company gross” production, reserves, contingent resources or prospective resources, which are Company’s working interest (operating or non-

  • perating) share before deduction of royalties and without including any royalty interests of

Company; (b) in relation to wells, total number of wells in which a company has an interest; and (c) in relation to properties, total area of properties in which Company has an interest. “prospective resources” means quantities of petroleum estimated, as of a given date, to be potentially recoverable from undiscovered accumulations by application of future development

  • projects. Prospective resources have both an associated chance of discovery and a chance of
  • development. Not all exploration projects will result in discoveries. Chance that an exploration

project will result in discovery of petroleum is referred to as “chance of discovery.” Thus, for an undiscovered accumulation, chance of commerciality is product of two risk components — chance of discovery and chance of development. “proved reserves” are those reserves that can be estimated with a high degree of certainty to be recoverable. It is likely that actual remaining quantities recovered will exceed estimated proved reserves; “proved developed reserves” are those proved reserves that are expected to be recovered from existing wells and installed facilities or, if facilities have not been installed, that would involve a low expenditure (e.g., when compared to cost of drilling a well) to put reserves on production. Developed category may be subdivided into producing and non-producing; “proved undeveloped reserves” are those proved reserves expected to be recovered from known accumulations where a significant expenditure (e.g., when compared to cost of drilling a well) is required to render them capable of production. “probable reserves” are those unproved reserves that are less certain to be recovered than proved reserves. It is equally likely that actual remaining quantities recovered will be greater

  • r less than sum of estimated proved plus probable reserves.

“possible reserves” are those additional reserves that are less certain to be recovered than probable reserves. There is a 10% probability that quantities actually recovered will equal or exceed sum of proved plus probable plus possible reserves. “reserves” are estimated remaining quantities of oil and natural gas and related substances anticipated to be recoverable from known accumulations, as of a given date, based on: (a) analysis of drilling, geological, geophysical and engineering data; (b) use of established technology; and (c) specified economic conditions, which are generally accepted as being

  • reasonable. Reserves classified according to degree of certainty associated with estimates.
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49

FUNDS FLOW FROM OPERATIONS

Three Months Ended

Funds Flow From Operations – Non-GAAP Measure (US$ 000s) March 31, 2016 December 31, 2015 Net loss $(45,032) $(82,722) Adjustments to reconcile net loss to funds flow from operations DD&A expenses 36,912 33,044 Asset Impairment 56,898 106,640 Deferred tax recovery (27,136) (45,661) Stock-based compensation 1,460 580 Cash settlement of RSUs (673) (29) Unrealized foreign exchange (gain) loss (183) 4,713 Financial instruments loss 845 765 Cash settlement of financial instruments 44

  • Gain on acquisition

(11,712)

  • Other gain
  • (502)

Funds Flow from Operations $11,423 $16,828

Funds flow from operations is net loss adjusted for DD&A expenses, asset impairment, deferred tax recovery or expense, stock-based compensation, cash settlement of RSUs, unrealized foreign exchange loss or gain, financial instruments loss or gain, cash settlement of financial instruments, gain on acquisition and other gain. Funds flow from operations is a non-GAAP measure which does not have any standardized meaning prescribed under GAAP. Management uses this financial measure to analyze operating performance and income or loss generated by our principal business activities prior to consideration of how non-cash items affect that income or loss, and believes this financial measure is also useful supplemental information for investors to analyze operating performance and our financial results. Investors should be cautioned that this measure should not be construed as an alternative to net income or loss or other measures of financial performance as determined in accordance with GAAP. Our method of calculating this measure may differ from other companies and may not be comparable to similar measures used by other companies.

slide-50
SLIDE 50

50 BOE’s may be misleading particularly if used in isolation. A BOE conversion ratio of 6 thousand cubic feet of gas to 1 barrel of oil is based on an energy equivalency conversion method primarily applicable at the burner tip and does not represent a value equivalency at the wellhead. In addition, given that the value ratio based on the current price of oil as compared with natural gas is significantly different from the energy equivalent of six to one, utilizing a BOE conversion ratio of 6Mcf:1bbl would be misleading as an indication of value. The estimates of reserves and future net revenue for individual properties may not reflect the same confidence level as estimates of reserves and future net revenue for all properties due to the effects of aggregation. Possible reserves are those additional reserves that are less certain to be recovered than probable reserves. There is a 10% probability that the quantities actually recovered will equal or exceed the sum of proved plus probable plus possible reserves. Unless otherwise specified, in this presentation, all production is reported on a working interest basis (operating and non-operating) before the deduction of royalties payable. Estimates of the Company’s reserves, contingent resources and prospective resources and the net present value of future net revenue attributable to the Company’s reserves, contingent resources and prospective resources are based upon the reports prepared by McDaniel & Associates Consultants (“McDaniel”) and GLJ Petroleum Consultants (“GLJ”), the Company’s independent qualified reserves evaluators and by a member of management who is a qualified reserves evaluator, as at the effective dates that are specified in this

  • presentation. The estimates of reserves, contingent resources and prospective resources provided in this presentation are estimates only and there is no guarantee that the estimated

reserves, contingent resources and prospective resources will be recovered. Actual reserves, contingent resources and prospective resources may be greater than or less than the estimates provided in this in this presentation and the differences may be material. Estimates of net present value of future net revenue attributable to the Company’s reserves, contingent resources and prospective resources do not represent fair market value and there is uncertainty that the net present value of future net revenue will be realized. There is no assurance that the forecast price and cost assumptions applied by McDaniel and GLJ in evaluating Gran Tierra’s reserves, contingent resources and prospective resources will be attained and variances could be material. There is no certainty that any portion of the prospective resources will be discovered. If discovered, there is no certainty that it will be commercially viable to produce any portion of the prospective resources. There is also uncertainty that it will be commercially viable to produce any part of the contingent resources. The estimates of reserves and future net revenue for individual properties may not reflect the same confidence level as estimates of reserves and future net revenue for all properties, due to the affect of aggregation. Estimates of contingent resources or prospective resources are by their nature more speculative than estimates of proved reserves and would require substantial capital spending over a significant number of years to implement recovery. Actual locations drilled and quantities that may be ultimately recovered from our properties will differ substantially. In addition, we have made no commitment to drill, and likely will not drill, all of the drilling locations that have been attributable to these quantities. All of Gran Tierra’s prospective resources have been classified as light and medium crude oil and conventional natural gas. Gran Tierra’s contingent resources have been classified as heavy crude oil. The prospective resources estimates that are referred to herein are un-risked as to both chance of discovery and chance of development and the contingent resources estimates that are referred to herein are un-risked as to chance of development (i.e. the level of risk associated with the chance of discovery and chance of development was not assessed by McDaniel, GLJ or the member of management who is a qualified reserves evaluator, as part of the evaluations that were conducted). Risks that could impact the chance of discovery and chance of development include, without limitation: geological uncertainty and uncertainty regarding individual well drainage areas; uncertainty regarding the consistency of productivity that may be achieved from lands with attributed resources; potential delays in development due to product prices, access to capital, availability of markets and/or take-away capacity; and uncertainty regarding potential flow rates from wells and the economics of those wells.

PRESENTATION OF OIL & GAS INFORMATION

slide-51
SLIDE 51

51 The following classification of contingent and prospective resources is used in the presentation:

  • Low Estimate means there is at least a 90 percent probability (P90) that the quantities actually recovered will equal or exceed the low estimate.
  • Best Estimate means there is at least a 50 percent probability (P50) that the quantities actually recovered will equal or exceed the best estimate.
  • High Estimate means there is at least a 10 percent probability (P10) that the quantities actually recovered will equal or exceed the high estimate.

On January 31, 2015, Gran Tierra received the draft results of a reserves estimate for Bretaña field in Peru, provided by its independent reserves auditor, GLJ Petroleum Consultants (“GLJ”), in response to the drilling results of the Bretaña Sur 95-3-4-1X appraisal well subsequent to year-end 2014. As expected, this drilling data did result in a reduction of the Probable and Possible reserves associated with the Bretaña Field and, following a review of the draft report for the updated reserves, and considering the current low oil price environment and the significant aspects of the Bretaña Field project no longer in line with Gran Tierra’s strategy, the Board of Directors determined that they would not proceed with the further capital investment required to develop the Bretaña Field. As a result of this decision, all 2P and 3P reserves associated with the field were reduced to nil and reclassified as contingent

  • resources. Please see the press release of Gran Tierra dated March 1, 2015 and filed on SEDAR (www.sedar.com) on March 4, 2015, for a further discussion of these contingent
  • resources. The contingent resource estimate was prepared in compliance with National Instrument 51-101 – Standards of Disclosure for Oil and Gas Activities and the Canadian Oil and

Gas Evaluation Handbook. On January 29, 2014, Gran Tierra announced the results of a prospective resource estimate for its four largest prospects in Peru, provided by its independent reserves auditor, GLJ effective October 1, 2013. The resource estimate was prepared in compliance with National Instrument 51-101 – Standards of Disclosure for Oil and Gas Activities and the Canadian Oil and Gas Evaluation Handbook. In the January 29, 2014 press release, and this presentation, risked prospective resources have been risked for chance of discovery but have not been risked for chance of development. If a discovery is made, there is no certainty that it will be developed or, if it is developed, there is no certainty as to the timing of such development. Also, as a non-GAAP measure: The Company's before tax net present values of 2P reserves prepared in accordance with NI 51-101 and COGEH and discounted at 10% ("PV-10") differs from its USGAAP standardized measure because (i) SEC and FASB standards require that the standardized measure reflects reserves and related future net revenue estimated using average prices for the previous 12 months, whereas NI 51-101 reserves and related future net revenue are estimated based on forecast prices and costs and {ii) the standardized measure reflects discounted future income taxes related to the Company's operations. The Company believes that the presentation of PV-10 is useful to investors because it presents (i) relative monetary significance of its oil and natural gas properties regardless of tax structure and (ii) relative size and value of its reserves to other companies. The Company also uses this measure when assessing the potential return on investment related to its oil and natural gas properties. PV-10 and the standardized measure of discounted future net cash flows do not purport to present the fair value of the Company's oil and gas reserves. The Company has not provided a reconciliation of PV-10 to the standardized measure of discounted future net cash flows because it is impracticable to do so. In general, the significant factors that may change the prospective resources and contingent resources estimates include further delineation drilling, which could change the estimates either positively or negatively, future technology improvements, which would positively affect the estimates, and additional processing capacity that could affect the volumes recoverable

  • r type of production. Additional facility design work, development plans, reservoir studies and delineation drilling is expected to be completed by the Company in accordance with its

long-term resource development plan.

PRESENTATION OF OIL & GAS INFORMATION

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SLIDE 52

52 Disclosure of Reserve Information and Cautionary Note to U.S. Investors Unless expressly stated otherwise, all estimates of proved, probable and possible reserves and related future net revenue disclosed in this presentation have been prepared in accordance with NI 51-101. Estimates of reserves and future net revenue made in accordance with NI 51-101 will differ from corresponding estimates prepared in accordance with applicable U.S. Securities and Exchange Commission (“SEC”) rules and disclosure requirements of the U.S. Financial Accounting Standards Board (“FASB”), and those differences may be material. NI 51-101, for example, requires disclosure of reserves and related future net revenue estimates based on forecast prices and costs, whereas SEC and FASB standards require that reserves and related future net revenue be estimated using average prices for the previous 12 months. In addition, NI 51-101 permits the presentation of reserves estimates

  • n a “company gross” basis, representing Gran Tierra’s working interest share before deduction of royalties, whereas SEC and FASB standards require the presentation of net reserve

estimates after the deduction of royalties and similar payments. There are also differences in the technical reserves estimation standards applicable under NI 51-101 and, pursuant thereto, the COGEH, and those applicable under SEC and FASB requirements. In addition to being a reporting issuer in certain Canadian jurisdictions, Gran Tierra is a registrant with the SEC and subject to domestic issuer reporting requirements under U.S. federal securities law, including with respect to the disclosure of reserves and other oil and gas information in accordance with U.S. federal securities law and applicable SEC rules and regulations (collectively, “SEC requirements”). Disclosure of such information in accordance with SEC requirements is included in the Company's Annual Report on Form 10-K and in

  • ther reports and materials filed with or furnished to the SEC and, as applicable, Canadian securities regulatory authorities. The SEC permits oil and gas companies that are subject to

domestic issuer reporting requirements under U.S. federal securities law, in their filings with the SEC, to disclose only estimated proved, probable and possible reserves that meet the SEC’s definitions of such terms. Gran Tierra has disclosed estimated proved, probable and possible reserves in its filings with the SEC. In addition, Gran Tierra prepares its financial statements in accordance with United States generally accepted accounting principles, which require that the notes to its annual financial statements include supplementary disclosure in respect of the Company’s oil and gas activities, including estimates of its proved oil and gas reserves and a standardized measure of discounted future net cash flows relating to proved

  • il and gas reserve quantities. This supplementary financial statement disclosure is presented in accordance with FASB requirements, which align with corresponding SEC requirements

concerning reserves estimation and reporting. In this presentation, the Company uses the terms contingent resources and prospective resources. The SEC guidelines strictly prohibit the Company from including contingent or prospective resources in filings with the SEC. Investors are urged to consider closely the disclosures and risk factors in the Company's Annual Report on Form 10-K, Quarterly Reports

  • n Form 10-Q and in the other reports and filings with the SEC, available from the Company's offices or website. These forms can also be obtained from the SEC via the internet at

www.sec.gov or by calling 1-800-SEC-0330.

PRESENTATION OF OIL & GAS INFORMATION

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SLIDE 53

53 Slide 5 – Why Invest in Gran Tierra

  • 1. PetroLatina reserves, operating costs, operating netbacks and full-cycle acquisition & development costs based on independent reserves evaluation, effective December 31, 2015

completed by McDaniel & Associates Ltd. (“McDaniel”) in accordance with Canadian National Instrument 51-101 - Standards for Oil and Gas Activities (“NI 51-101”) and the Canadian Oil and Gas Evaluation Handbook (“COGEH”) (the “McDaniel All Fields Evaluation”). Operating netbacks per barrel calculated as oil sales net of royalties, less operating costs, divided by annual working interest (“WI”) production before royalties; McDaniel January 1, 2016 Brent price deck: US$56.2/bbl 2017; operating netback is a non-GAAP measure and does not have a standardized meaning under generally accepted accounting principles (“GAAP”) in the United States of America. Slide 6 – Why Invest in Gran Tierra

  • 1. Based on independent evaluation of prospective resources prepared by McDaniel as at September 30, 2015 with respect to Gran Tierra's Colombian properties, independent

evaluation of Petroamerica Oil Corp's ("Petroamerica") prospective resources prepared by McDaniel as at December 31, 2015 ("PTA McDaniel Prospective Resources Report") and further derived from PTA McDaniel Prospective Resources Report by a member of management who is a qualified reserves evaluator in accordance with COGEH as of same date as PetroGranada Colombia Limited ("PGC") owns the remaining 50% WI in the Putumayo-7 Block, the other 50% WI being owned by Petroamerica and derived from PTA McDaniel Prospective Resources Report by a member of management who is a qualified reserves evaluator in accordance with COGEH as of the same date as PetroLatina owns the remaining 30% WI in the Putumayo-4 Block, the other 70% WI being owned by Gran Tierra.

  • 2. Source: OCP Ecuador
  • 3. Source: CENIT Transporte Colombia

Slide 8 – Company Snapshot

  • 3. Enterprise Value (US$777MM) = Market Capitalization (US$856MM) PLUS Convertible Senior Notes (US$115MM) MINUS Working Capital (US$194MM)
  • 4. Enterprise Value (US$944MM) = Market Capitalization (US$1,023MM) PLUS Convertible Senior Notes (US$115MM) MINUS Working Capital (US$194MM)
  • 5. Includes reserves acquired through acquisitions of Petroamerica & PetroGranada in January 2016. Based on independent reserve reports prepared by McDaniel as of December 31,

2015, NI 51-101 & COGEH compliant gross WI (“McDaniel NI 51-101 Reserve Reports”)., including reserves acquired through acquisitions of Petroamerica & PetroGranada. Gran Tierra ONLY 2P NPV 10% Before Tax is US$1,100MM, W.I. Proved Reserves are 48.4 MMBOE & W.I. Proved plus Probable Reserves are 66.0 MMBOE . Pro forma SEC compliant W.I. Proved Reserves of 51.3 MMBOE & W.I. Proved plus Probable Reserves of 75.8 MMBOE.

  • 6. Include reserves to be acquired through acquisition of PetroLatina (see slide 5 – endnote 1), plus existing reserves referred to in endnote 5 directly above.
  • 7. SEC standardized measures of after tax future net cash flows discounted at 10% for Gran Tierra's and combined Petroamerica and PGC SEC compliant proved oil and gas reserves at

December 31, 2015, were $464.8 million and $38.9 million, respectively.

  • 8. Based on the McDaniel NI 51-101 Reserve Reports before tax, discounted at 10%. Gran Tierra value-adjusted to include US$170mm of cash and current restricted cash as at May 31,

2016; pro forma valuation adjusted for transaction consideration paid from working capital & debt facilities ($160mm cash + $62mm credit facility + $130mm debt). See non-GAAP measures in the appendix for further information on NI 51-101 2P net present value before tax discounted at 10%. Slide 9 – Corporate Strategy

  • 1. See slide 6, endnote 1.

Slide 17 – Pro Forma Value

  • 3. See slide 8, endnote 8.
  • 4. $170MM equal to cash plus current restricted cash as at May 31, 2016.
  • 5. Increase in net debt of $352MM comprised of decrease in cash of $160MM, new debt facility of $160MM and additional RBL facility of $62MM.

ENDNOTES (ALL $ FIGURES IN US$ UNLESS OTHERWISE STATED)

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SLIDE 54

54 Slide 23 – Multiple Export Routes

  • 1. Source: OCP Ecuador
  • 2. Source: CENIT Transporte Colombia

Slide 25 – Colombia - Costayaco Overview

  • 1. Based on independent report by McDaniel as of December 31, 2015, NI 51-101 & COGEH compliant gross W.I.
  • 2. F&D costs per BOE is calculated as the sum of development capital, including development costs incurred to date and estimated future development costs, divided by the applicable

remaining reserves plus cumulative production to date. Slide 28 – Moqueta Overview

  • 1. Based on independent report by McDaniel as of December 31, 2015, NI 51-101 & COGEH compliant gross W.I.
  • 2. See slide 25, endnote 2

Slide 31 – Suroriente Block – Location & Overview

  • 1. Reserves acquired through Petroamerica acquisition in January 2016. Based on independent report by McDaniel as of December 31, 2015, NI 51-101 & COGEH compliant gross W.I.

Slide 34 – Peru Block 95

  • 1. Based on GLJ Petroleum Consultants (“GLJ”) contingent resource estimate with effective date of September 30, 2015. See definition of contingent resources in Glossary of Terms.

Slide 35 – Peru Exploration

  • 1. Based on GLJ prospective resource estimate, effective date of September 30, 2015. See definition of prospective resources in Glossary of Terms.

Slide 39 – Mean Prospective Resources

  • 1. See slide 6, endnote 1 EXCLUDING PetroLatina Acquisition

Slide 40 – McDaniel Prospective Resources Year End 2015

  • 1. See slide 6, endnote 1 EXCLUDING PetroLatina Acquisition

Slide 42 – Regional “N” Sand Basin Statistics

  • 1. Internal evaluation by GTE Exploration Team effective May 31, 2016

Slide 47 – Management Track Record

  • 1. Caracal - Performance from 9 Mar 2011 (C$5.00/sh. – Griffiths private placement in March 2011) to 8 Jul 2014 (£5.50/sh. eq. to C$10.07/sh. at time of close). Gary joined Caracal in

July 2011.

  • 2. Orion - Performance from May 2009 (C$0.44/sh. private placement – Sprott offer for Auriga Energy in October 2009) to 8 Jul 2011 (C$1.00/sh. at time of close). Gary joined Auriga

Energy in May 2009.

  • 3. Tanganyika - Performance from 16 May 2005 (C$6.50/sh. at joining) to 23 Dec 2008 (C$31.50/sh. at time of close). Gary joined Tanganyika in May 2005.

ENDNOTES (ALL $ FIGURES IN US$ UNLESS OTHERWISE STATED)

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SLIDE 55

55

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