Exhibit 4.27











Amendment
agreement No. 1



relating to a pre-payment agreement dated
18 December 2015















Dated	                                 September 1, 2016













GeoPark Colombia S.A.S.



(the Seller)



C.I. Trafigura Petroleum Colombia S.A.S.



(the Buyer)



GeoPark Ltd.



(the Guarantor)









Amendment
agreement No. 1 (the Agreement)



|Dated | September
    1, 2016
|----- | ---------------------



Between



| | (1) | GeoPark
                                         Colombia S.A.S., a company incorporated under the laws of Colombia whose registered
                                         office is at Calle 94 No. 11-30 8th Floor, Bogota, Colombia (the Seller);
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | C.I.
                                         Trafigura Petroleum Colombia S.A.S., a company incorporated under the laws of Colombia
                                         whose registered office is at Carrera 11 No. 82-01 Of. 701, Bogota, Colombia (the Buyer);
                                         and
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (3) | GeoPark
                                         Ltd.,a company incorporated under the laws of Bermuda whose registered office is
                                         at Cumberland House, 9th Floor, 1 Victoria Street, Hamilton HM11, Bermuda
                                         with registration number 33273 (the Guarantor).
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Recitals



| | A | This
                                         Agreement No. 1 is supplemental to and amends a facility agreement dated 18 December
                                         2015, between, among others, the Seller, the Buyer and the Guarantor (thePrepayment
                                         Agreement).
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | B | The
                                         Parties have agreed to make certain amendments to the Prepayment Agreement on the terms
                                         of this Agreement and to provide certain confirmations in respect of the Transaction
                                         Documents.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



It is
agreed:



| | 1 | Definitions
                                         and construction
| | - | ---------------------------------------------------------------------



| | 1.1.1 | Definitions
| | ----- | -----------



Words
and expressions defined in the Prepayment Agreement, as amended by this Agreement, shall have the same meanings in this Agreement.
In addition:



Amendment
Effective Date means the date on which the Buyer notifies the Seller that it has received all the documents and evidence listed
in the Schedule, each in form and substance satisfactory to it.



| | 1.1.2 | Construction
| | ----- | ------------



The
principles of construction set out in clause 1.2 (Interpretation) of the Prepayment Agreement shall apply to this
Agreement, insofar as they are relevant to it, as they apply to the Prepayment Agreement.



| | 1.1.3 | Third
                                         party rights
| | ----- | -----------------------------------------------------------



The
provisions of clause 1.3 (Third party rights) of the Prepayment Agreement shall apply to this Agreement as they apply
to the Prepayment Agreement.



Page 2





| | 2 | Amendments
| | - | ----------



With
effect from the Amendment Effective Date, the Prepayment Agreement shall be amended as follows.



| | 2.1.1 | Clause
                                         2.1 paragraphs (a) and (b) of the Prepayment Agreement shall be deleted in their entirety
                                         and replaced with the following:
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



“(a)
Subject to paragraph (c) below and the other terms of this Agreement the Buyer makes available to the Seller the Advances up to
and including the end of the Availability Period in an aggregate amount not exceeding the Initial Commitment.



(b)
[Intentionally left blank].”.



| | 2.1.2 | Clause
                                         6.3 of the Prepayment Agreement shall be deleted in its entirety and replaced with the
                                         following:
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



“[Intentionally
left blank]”.



| | 2.1.3 | The
                                         words “5,000 bpd” in Caluse 18.14 (Delivery under Commercial Contract)
                                         of the Prepayment Agreement shall be deleted and replaced with the words “7,000
                                         bpd”.
| | ----- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.1.4 | The
                                         definition of ‘Availability Period’ set out in Schedule 2 (Definitions)
                                         of the Prepayment Agreement shall be deleted in its entirety and replaced with the following:
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



“Availability
Periodmeans the period from and including the Signing Date, to and including 30 December 2016, or such later date
as may be agreed by the Buyer in its sole and absolute discretion”.



| | 2.1.5 | The
                                         words "subject to the limitations set out in Clause 2.1 (b)" in the
                                         definition of "Commitment" at Schedule 2 of the Prepayment Agreement shall
                                         be deleted.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.1.6 | The
                                         definition of “Initial Commitment Period End Date” and “Reduced Commitment”
                                         at Schedule 2 of the Prepayment Agreement shall be deleted in its entirety.
| | ----- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.1.7 | In
                                         the definition of “Maturity Date” set out in Schedule 2 (Definitions)
                                         of the Prepayment Agreement the words “30 June 2018” shall be deleted
                                         and replaced by the words “30 December 2018”.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2.1.8 | In
                                         the definition of “Reimbursement Period” set out in Schedule 2 (Definitions)
                                         of the Prepayment Agreement the words “1 July 2016 to and including June 30
                                         2018” will be deleted and replaced by the words “1 January 2017 to
                                         and including 30 December 2018”.
| | ----- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3 | Confirmations
| | - | -------------



| | 3.1.1 | Without
                                         prejudice to the rights of the Buyer which have arisen on or before the date of this
                                         Agreement or the Amendment Effective Date, each of the Seller and the Guarantor confirm,
                                         that, on and after the date of this Agreement and the Amendment Effective Date:
| | ----- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (a) | the
                                         Prepayment Agreement (as amended by this Agreement), and the other Transaction Documents
                                         (to which they are a party), will remain in full force and effect; and
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (b) | the
                                         Security Documents (to which they are a party) will:
| | --- | -------------------------------------------------------------------------------------------------



Page 3





| | (i) | not
                                         be affected by this Agreement and will continue in full force and effect to the extent
                                         not replaced, ratified or supplemented as contemplated by this Agreement, subject to
                                         any limitations set out in the Security Documents;
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | extend
                                         to the liabilities and obligations of the Seller and the Guarantor as laid out in the
                                         Prepayment Agreement (as amended by this Agreement); and
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (iii) | include
                                         as obligations of the Seller and the Guarantor any additional indebtedness incurred and
                                         other obligations under the Prepayment Agreement as amended by this Agreement.
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3.1.2 | The
                                         Guarantor confirms that, on and after the date this Agreement, its guarantee, set out
                                         at clause 13 of the Prepayment Agreement (the Guarantee) will remain in full force
                                         and effect and will extend to the Seller’s obligations under the Prepayment Agreement
                                         (as amended by this Agreement).
| | ----- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 4 | Representations
                                         and warranties
| | - | -----------------------------------------------------------------------



The
representations and warranties set out in clause 14 (Representations and warranties) of the Prepayment Agreement are deemed
to be repeated by both the Seller and the Guarantor by reference to the facts and circumstances then existing on the date of this
Agreement and the Amendment Effective Date.



| | 5 | Further
                                         action
| | - | -------------------------------------------------------



The
Seller and the Guarantor shall, at their own expense, promptly take any action and sign or execute any further documents which
the Buyer may require in order to give effect to the requirements of this Agreement.



| | 6 | Counterparts
| | - | ------------



This
Agreement may be executed in any number of counterparts, and this has the same effect as if the signatures on the counterparts
were on a single copy of this Agreement.



| | 7 | Governing
                                         law and enforcement
| | - | ----------------------------------------------------------------------



| | 7.1.1 | Governing
                                         Law
| | ----- | ------------------------------------------------------



This
Agreement, its interpretation and any non-contractual obligations arising from or connected with it, is governed by and shall
be construed in accordance with English law.



| | 7.1.2 | Enforcement
| | ----- | -----------



The
provisions of paragraph 29 (Dispute Resolution and Jurisdiction) of the Prepayment Agreement shall apply to this Agreement
as they apply to the Prepayment Agreement.



This Agreement
has been entered into on the date stated at the beginning of this Agreement.



Page 4





Schedule



Conditions
precedent to the Amendment Effective Date



1.This Agreement, duly executed by all the parties to it.



2.The 3rd amendment agreement to the Commercial Contract, duly executed by all the parties to it.



3.Any other document or evidence required by the Buyer in connection with this Agreement and the transactions contemplated
by this Agreement.





Page 5







Execution
Pages



The Seller



|Executed by GeoPark Colombia S.A.S..as the Seller and
    signed by person(s) who under the laws of Colombia are acting under the authority of that company |  | /s/ Marcela Vaca Torres  |                     
|----------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------------------ | --------------------
|                                                                                                                                                            |  | Name:                    | Marcela Vaca Torres 
|                                                                                                                                                            |  | Position:                | Legal Representative
|                                                                                                                                                            |  |                          |                     
|                                                                                                                                                            |  | /s/ Carlos Bolaños Ortiz |                     
|                                                                                                                                                            |  | Name:                    | Carlos Bolaños Ortiz
|                                                                                                                                                            |  | Position:                | Legal Representative







|The Buyer                                                                                                                                                                   |  |                      |                      | 
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------------- | -------------------- | 
|                                                                                                                                                                            |  |                      |                      | 
|Executed by C.I. Trafigura Petroleum Colombia S.A.S.
    as the Buyer and signed by person(s) who under the laws of Colombia are acting under the authority of that company |  | /s/ Nicolas Daguerre |                     
|                                                                                                                                                                            |  | Name:                | Nicolas Daguerre     | 
|                                                                                                                                                                            |  | Position:            | Legal Representative | 
|                                                                                                                                                                            |  |                      |                      | 
|                                                                                                                                                                            |  | /s/ Emilio Conotti   |                     
|                                                                                                                                                                            |  | Name:                | Emilio Conotti       | 
|                                                                                                                                                                            |  | Position:            | Power of Attorney    | 







|The Guarantor                                                                                                                                     |  |                                    |                                | 
|------------------------------------------------------------------------------------------------------------------------------------------------- |  | ---------------------------------- | ------------------------------ | 
|                                                                                                                                                  |  |                                    |                                | 
|Executed by Geopark Ltd.as the Guarantor and signed
    by person(s) who under the laws of Bermuda are acting under the authority of that company |  | /s/ Pedro Enrique Aylwin Chiorrini |                               
|                                                                                                                                                  |  | Name:                              | Pedro Enrique Aylwin Chiorrini | 
|                                                                                                                                                  |  | Position:                          | Legal Representative           | 









Page 6