GPRK GeoPark Limited

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: February 6, 2018

Item 1

GEOPARK ANNOUNCES RECORD CERTIFIED 2P OIL AND GAS RESERVES OF 159 MMBOE FOLLOWING A 261% RESERVE REPLACEMENT –  

WITH A NPV10 VALUATION OF $2.3 BILLION

IN COLOMBIA: 2P RESERVES INCREASED 31% TO 88.2 MMBOE

EQUAL TO A NET DEBT-ADJUSTED VALUE OF $15.8 PER SHARE

Bogota, Colombia – February 5, 2018 - GeoPark Limited (“GeoPark” or the “Company”) (NYSE: GPRK), a leading independent Latin American oil and gas explorer, operator and consolidator with operations and growth platforms in Colombia, Chile, Brazil, Argentina, and Peru, today announced its independent oil and gas reserves assessment, certified by DeGolyer and MacNaughton Corp. (D&M), under PRMS methodology, as of December 31, 2017.

All figures are expressed in US Dollars. Definitions of terms used herein, are provided in the Glossary on page 13.

Year-End 2017 D&M Certified Oil and Gas Reserves and Highlights:

Consolidated Reserves Growth

Colombia Reserves Growth

Higher Per-Share Value

James F. Park, Chief Executive Officer of GeoPark, said: “Our business is to economically find, develop and produce oil and gas reserves – and the independent reserve certification is the scorecard of how efficiently we invest our capital to continue growing and becoming a more valuable company every year. Our results this year demonstrate that, even following record high oil and gas production, we continue building our Company with record high oil and gas reserves and a record high net asset value. For every barrel produced, we replaced it with almost three proven barrels. And all was paid for from internally generated cash from our own operations – which also had a big increase from the year before. We invested $106 million of our cash flow and were able to increase our proven reserve value by $430 million – taking our total 2P net present value to over $2 billion. Congratulations to the GeoPark team for another successful year of delivering results and value creation – and extending our 15 year track-record of growth across our unique Latin American platform.”

2P Net Reserves Growth (mmboe)

2017 Year-End Reserves Summary

GeoPark engaged D&M to carry out an independent appraisal of reserves as of December 31, 2017, covering 100% of the current assets in Colombia, Chile, Brazil, Peru and Argentina.

Following oil and gas production of 10.2 mmboe in 2017, D&M certified 2P net reserves of 159.2 mmboe (composed of 85% oil and 15% natural gas) as of December 31, 2017. By country, 55% were in Colombia, 21% in Chile, 20% in Peru, 3% in Brazil and 1% in Argentina.

Analysis by Business Segment

Colombia

After record production of 8.0 mmboe in 2017 (up 40% compared to 2016), GeoPark’s 2P D&M certified reserves increased by 31% to 88.2 mmboe compared to 2016. Net additions of 33.7 mmbbl and 28.8 mmbbl, respectively, of 1P and 2P reserves resulted from the successful exploration, development and appraisal drilling in the Llanos 34 block (GeoPark operated, 45% WI), partially offset by 2017 production.

The table below details GeoPark’s Colombian D&M certified net oil reserves by category as of December 31, 2017, as compared to the previous year:

1P reserves in Colombia represent 75% of 2P D&M certified reserves (vs. 60% in 2016). 2P reserves in Colombia represent 87% of 3P D&M certified reserves (vs. 71% in 2016).

For each barrel of oil extracted in Colombia, 4.2 barrels of 1P reserves were added, resulting in a 1P RRI of 421%. Similarly, 3.6 barrels of 2P reserves were added, resulting in a 2P RRI of 360%. The 1P RLI increased from 7.1 in 2016 to 8.3 years, while 2P RLI decreased slightly from 11.8 to 11.0 years.

As of December 31, 2017, D&M certified 2P gross reserves of 164 mmbbl in the Tigana/Jacana oil fields in the Llanos 34 block, including approximately 50-60 future development drilling locations (2P, gross). The Llanos 34 block represented 94% of GeoPark’s Colombian 2P D&M certified reserves as of December 31, 2017.

GeoPark’s 2018 work program in Colombia is focused on the Llanos 34 block with an expected investment of approximately $90 million, which includes the drilling of 20+ gross wells to continue developing and appraising the Tigana/Jacana oil fields and targeting new exploration prospects within and adjacent to the Llanos 34 block. The program also includes construction of a new flowline and facilities to continue reducing transport and operating costs. These represent low-cost, low-risk, quick cash flow generating projects with high-expected economic returns.

Chile

After producing 1.1 mmboe in 2017, GeoPark’s 2P D&M certified reserves in Chile decreased by 11% to 34.0 mmboe compared to 2016.

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¹ Reserves in Colombia are stated after royalties in kind. Before royalties in kind (Company gross), PDP reserves totaled 23.6 mmboe (100% oil), PUD reserves totaled 49.2 mmboe, 1P reserves totaled 72.8 mmboe (100% oil), 2P reserves totaled 92.3 mmboe (100% oil) and 3P reserves totaled 106.2 mmboe (100% oil).

The table below details GeoPark’s Chilean D&M certified net oil and natural gas reserves by category as of December 31, 2017:

The 1P RLI decreased to 7.2 years versus 9.9 years in 2016.

Total 2P and 3P reserves decreased by 11% and 9%, to 34.0 mmboe and 66.6 mmboe, respectively, due to reserve reductions in the Fell block (GeoPark operated, 100% WI). Delays in expected development plans, technical revisions and, to a lesser extent, the impact of oil prices on some marginal fields, explained the fall in reserves.

The Fell block represented 99% of GeoPark’s Chilean 2P D&M certified reserves and consisted of 40% oil and 60% gas, similar to 2016 levels.

GeoPark’s 2018 work program in Chile, with an expected investment of $1-2 million, is focused on business optimization in addition to environmental and unconventional studies in the Fell block.

Brazil

After production of 1.1 mmboe in 2017, GeoPark’s 2P D&M certified reserves in Brazil decreased 21% by the amount produced to 4.4 mmboe compared to 2016.

The table below details GeoPark’s Brazilian D&M certified net natural gas and condensate reserves by category as of December 31, 2017:

The 2P RLI decreased to 4.0 years compared to 5.2 years in 2016.

The Manati Field (GeoPark non-operated, 10% WI) represented 100% of GeoPark’s Brazilian D&M certified reserves and is 98% gas.

GeoPark’s 2018 work program in Brazil, with an expected investment of $3-4 million, is focused on exploration drilling in the Reconcavo and Potiguar onshore blocks (GeoPark operated, 70 and 100% WI, respectively). The work program includes two shallow exploration wells and seismic studies.

Peru

In December 2016, the Peruvian Government approved an agreement with Petróleos del Perú S.A. (“Petroperu”) for GeoPark to acquire an interest in and operate the Morona block (GeoPark operated, 75% WI), located in northern Peru covering an area of 1.9 million acres in the Marañon basin. The Morona block contains the Situche Central oil field, which has been delineated by two wells (which tested approximately 2,400 and 5,200 bopd) and by 3D seismic.

The table below details GeoPark’s Peruvian D&M certified net oil reserves by category as of December 31, 2017:

GeoPark’s 2018 work program in Peru, with an estimated investment of $6-9 million is focused on environmental impact studies and preliminary engineering works and facilities in the Morona block, with the goal of producing by the end of 2019.

Argentina

In August 2017, GeoPark announced successful drilling results in CN-V block (GeoPark operated, 50% WI), that resulted in the discovery of the Rio Grande Oeste oil field. During 4Q2017, GeoPark initiated a long-term test in the Rio Grande Oeste 1 exploration well.

The table below details GeoPark’s D&M certified net oil reserves in CN-V block by category as of December 31, 2017:

GeoPark’s 2018 organic work program in Argentina, with an expected investment of $5-8 million, is focused on continued exploration drilling with one exploration well in CN-V block and six gross exploration wells in Sierra del Nevado and Puelen blocks (GeoPark non-operated, 18% WI).

Argentina Acquisition (uncertified internal estimates)

On December 18, 2017, GeoPark executed an asset purchase agreement with Pluspetrol to acquire Aguada Baguales, El Porvenir and Puesto Touquet blocks in Argentina (referenced in this document as “Argentina acquisition”). Closing of the transaction is expected in the first quarter of 2018.

The table below details internal GeoPark estimates by category of net oil and gas reserves corresponding to the pending acquisition as of December 31, 2017:

The blocks are currently producing 2,700 boepd (70% light oil and 30% gas), and in addition to 2P and 3P reserves included in the table above, GeoPark estimates exploration resources of 15-30 mmboe.

Lower Oil Price Forecast

Brent oil prices average $65 per barrel over the next five years in the 2017 D&M report, as detailed in the table below. That is 8% below 2016 prices, and in spite of the reduction, the NPV10 of 1P, 2P and 3P all increased in value compared to 2016.

After 2026, Brent oil prices in the 2017 D&M report grow 2% per year.

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² Oil and gas revenues in Colombia are shown net of earn-out expenses, per IFRS rules, of $124 mm (1P), $159 mm (2P) and $184 mm (3P). D&M reported these expenses as operating costs.

Net Present Value per Share by Country

The table below sets forth GeoPark’s net present value after tax and non-controlling interest, discounted at a 10% rate per share, by country, of 2P reserves as of December 31, 2017 and 2016.

2P NPV10 per share increased by 20% to $34.0, mainly due to a 31% increase in 2P reserves in Colombia. As a result, net debt adjusted 2P NPV10 per share increased by 24% to $29.2 from $23.6 in 2016.

Finding and Development Costs by Reserves Category

The table below sets forth the calculation of F&D costs as of December 31, 2017:

OTHER NEWS / RECENT EVENTS

Reporting Date for 4Q2017 Results Release, Conference Call and Webcast

GeoPark will report its 4Q2017 and Annual 2017 financial results on Wednesday, March 7, 2018 after the market close.

In conjunction with 4Q2017 results press release, GeoPark’s management will host a conference call on March 8, 2017 at 10:00 am (Eastern Standard Time) to discuss these 4Q2017 financial results. To listen to the call, participants can access the webcast located in the Investor Support section of the company’s website at www.geo-park.com.

Interested parties may participate in the conference call by dialing the numbers provided below:

United States Participants: 866-547-1509

International Participants: +1 920-663-6208

Passcode: 6197567

Please allow extra time prior to the call to visit the website and download any streaming media software that might be required to listen to the webcast.

An archive of the webcast replay will be made available in the Investor Support section of the company’s website at www.geo-park.com after the conclusion of the live call.

NOTICE

Additional information about GeoPark can be found in the “Investor Support” section of the website at www.geo-park.com

The reserve estimates provided in this release are estimates only, and there is no guarantee that the estimated reserves will be recovered. Actual reserves may eventually prove to be greater than, or less than, the estimates provided herein. Statements relating to reserves are by their nature forward-looking statements.

Gas quantities estimated herein are reserves to be produced from the reservoirs, available to be delivered to the gas pipeline after field separation prior to compression. Gas reserves estimated herein includes fuel gas.

Rounding amounts and percentages: Certain amounts and percentages included in this press release have been rounded for ease of presentation. Percentage figures included in this press release have not in all cases been calculated on the basis of such rounded figures, but on the basis of such amounts prior to rounding. For this reason, certain percentage amounts in this press release may vary from those obtained by performing the same calculations using the figures in the financial statements. In addition, certain other amounts that appear in this press release may not sum due to rounding.

Oil and gas production figures included in this release are stated before the effect of royalties paid in kind, consumption and losses.

All evaluations of future net revenue contained in the D&M Reports are after the deduction of cash royalties, development costs, operating expenses, production and profit taxes, fees, earn out payments, well abandonment costs, and country income taxes from the future gross revenue. It should not be assumed that the estimates of future net revenues presented in the tables represent the fair market value of the reserves. The actual production, revenues, taxes and development, and operating expenditures with respect to the reserves associated with the Company's properties may vary, from the information presented herein, and such variations could be material. In addition, there is no assurance that the forecast price and cost assumptions contained in the D&M Report will be attained, and variances could be material.

CAUTIONARY STATEMENTS RELEVANT TO FORWARD-LOOKING INFORMATION

This press release contains statements that constitute forward-looking statements. Many of the forward looking statements contained in this press release can be identified by the use of forward-looking words such as ‘‘anticipate,’’ ‘‘believe’’, ‘‘could,’’ ‘‘expect,’’ ‘‘should,’’ ‘‘plan,’’ ‘‘intend,’’ ‘‘will,’’ ‘‘estimate’’ and ‘‘potential,’’ among others.

Forward-looking statements that appear in a number of places in this press release include, but are not limited to, statements regarding the intent, belief or current expectations, regarding various matters including 2018 work program, NPV10 and NPV10/share estimations, estimated future revenues and oil price forecast. Forward-looking statements are based on management’s beliefs and assumptions, and on information currently available to the management. Such statements are subject to risks and uncertainties, and actual results may differ materially from those expressed or implied in the forward-looking statements due to various factors.

Forward-looking statements speak only as of the date they are made, and the Company does not undertake any obligation to update them in light of new information or future developments or to release publicly any revisions to these statements in order to reflect later events or circumstances, or to reflect the occurrence of unanticipated events. For a discussion of the risks facing the Company which could affect whether these forward-looking statements are realized, see the Company’s filings with the U.S. Securities and Exchange Commission.

Information about oil and gas reserves: The SEC permits oil and gas companies, in their filings with the SEC, to disclose only proven, probable and possible reserves that meet the SEC's definitions for such terms. GeoPark uses certain terms in this press release, such as "PRMS Reserves" that the SEC's guidelines do not permit GeoPark from including in filings with the SEC. As a result, the information in the Company’s SEC filings with respect to reserves will differ significantly from the information in this press release. NPV10 for PRMS 1P, 2P and 3P reserves is not a substitute for the standardized measure of discounted future net cash flows for SEC proved reserves.