London September 2010

2

A T L A

N T I C

O C

E A N

S T R

A I T

M A G A L L A N E S O F

A R G E N T I N AA R G E N T I N A

C H I L EC H I L E

PUNTA ARENAS

OTWAY25%

FELL100%TRANQUILO

25%

Proven Production and Development

High Impact Exploration Upside

ASSETS CAPABILITIES EXECUTION OPPORTUNITY COMMITMENT+ + + +

Value Drivers Oil and Gas Finder and Developer

DEL MOSQUITO100%

3

0

10

20

30

40

50

60

March 2006 March 2008 July 2009 September 10 (e)

2P R

eser

ves

(MM

boe)

2P Gas 2P Oil

Executive Summary 1H 2010 Performance

0

1

2

3

4

5

6

7

8

2005 2006 2007 2008 2009 1H 2010

(Mbo

e/d)

Gas Oil and Condensate

Production

Reserves

Financial Performance:

• 120% Increase in Revenue (US$ 39.6 MM)

– Oil selling price increased by 92%

– Gas selling price increased by 58%

• Net Income Increase (US$9.7 MM)

• 142% Increase in Cash Flow (US$ 23.7 MM)

• 170% Increase in CAPEX: (US$34.3 MM)

Operational Performance:

• 8% Oil and Gas Production Increase (6,872 boepd)

– Oil production grew by 94% to an average of 1,966 barrels

• Consistent Drilling Success (13 new wells)

• 40% Oil and Gas Reserve Increase (2P of 55 mmboe):

– Based on GeoPark’s estimates, after deducting production since D&M report in July 2009

LGI Strategic Partnership:

• To jointly to acquire and develop upstream oil and gas projects throughout Latin America.

4

1H 2010 Revenue mix

Oil61%

Gas39%

1H 2009 Revenue mix

Oil38%

Gas62%

Interim Results 1H 2010 Performance

1H 2010 Revenues Reconciliation Revenue Mix

Revenues, OPEX and EBITDA per BOE

Revenues 1H 2009 vs 1H 2010 (in US$'000)

39,627

17,982

(2.139)

6,560

6,244

10,980

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

1H 2009 Decrease in gasproduction

Increase in oilproduction

Increase in gasprice

Increase in oilprice

1H 2010

-15

-10

-5

0

5

10

15

20

25

30

35

1H 2007 1H 2008 1H 2009 1H 2010

-50%

-25%

0%

25%

50%

75%

Revenue/BOE OPEX/BOE EBITDA/BOE EBITDA Mg/BOE

US

$/B

OE

5

Net Income Balance Sheet

Amounts in US$ ´000 1H 2010 1H 2009

Revenues 39,627 17,982

Total expenses (15,942) (11,198)

EBITDA 23,685 6,784

Depreciation (10,406) (8,058)

Accrual of stock options and stock awards (429) (618)

Capitalization of interests and G&G costs 936 1,006

Financial results (708) (2,501)

Stand by costs - (1,049)

Write off and impairment result (500) -

Income tax (2,257) (59)

Other operating costs (616) (541)

INCOME / (LOSS) 9,705 (5,036)

Interim Results 1H 2010 Performance

Amounts in US$ ´000 1H 2010 1H 2009

PP&E 146 109

Inventories 2 2

Cash and Equivalents 9 8

Other Assets 18 13

TOTAL ASSETS 174 131

Long-Term Borrowings 42 37

Short-Term Borrowings 14 11

Other Liabilities 22 19

TOTAL LIABILITIES 78 68

TOTAL EQUITY 78 68

8,526

(34,285)

(4,634)

23,685

23,760

Initial cash EBITDA Net Borrow ings andWK

Net capex Ending cash

1H 2010 Cash Flow Reconciliation 1H 2010 CAPEX Detail

Wells 72%

Prod. Facilities and Machinery

E&E Assetsfrom JV

Seismic Others

6

References

FELL BLOCK

NATIONAL PARK

PROBABLE OIL

PROVED OIL

PROVED GAS

POSSIBLE GAS

PROBABLE GAS

PROSPECT

LEAD

POSSIBLE OIL

3D SEISMIC

2010 Drilling Program

Total : 14 Wells• 5 Exploration (2 Oil, 3 Gas)• 5 Appraisal (3 Oil, 2 Gas)• 4 Develop. (3 Oil, 1 Gas)

Completed :• Dicky -16 (WOC) • Alakaluf -6• Alakaluf -8• Guanaco -3• Aonikenk Sur 1• Alakaluf -7• Alakaluf -9• Tetera -4• Co. Iturbe -1• Ayelén -2 (WOC)• Yagán N. -2 (WOC)• Guanaco -4 • Dicky -18 (WOC)

Next Wells :• Ayelén -1 (Drilling)• Guanaco -6• MAy -35 • Copihue -1

Development

Exploration &

appraisal

Productive Oil

Productive Gas

2010 Drilling Program

5 km

C H I L E

A R G E N T I N A

Aonikenk Sur x-1

Copihue x-1Tetera a-4

Alakaluf 9 App.

Alakaluf a-7

Guanaco x-3Munición Oeste x-2

Alakaluf 6

Alakaluf 8

Ayelen 1

Guanaco 4Yagán Norte 2

Cerro Iturbe x-1 Ayelen a-2

MAy 35Di-18

Guanaco 6STRAIT

OF

MAGALLANES

Production and Development Base Fell Block

7

Production Fell Block

Bringing Production On Line:

Learning to Produce at Technical Limits:

0

1

2

3

4

5

6

7

8

9

2005 2006 2007 2008 2009 2010 2010

Ave

rage

Dai

ly P

rodu

ctio

n (M

boe/

d)

Gas Oil and Condensate

Annual Production Growth: 96%/year

Forecast

(3Q)

2010 Budget

-8%∆∆∆∆ Prod:Oil: -18%Gas: -4% 2010 FY Average Daily Production Guidance:

• 2010 production is expected to be between 15% to 20% above the 2009 average.

• Exit production is projected to be above 8,500 boepd.

• Average daily production for 2010 is approximately 8% below prior expectations.

Initiatives to Boost Production:

• Review surface networks to identify bottle-necks.

• Review workover opportunities.

• Screen stimulation technology.0

100

200

300

400

500

600

700

800

Well

Per

form

ance

Netw

ork/F

acilit

iesRi

g Sc

hedu

ling

Down

time

Unde

r Stu

dy

TOTA

L

BO

ED

8

High Impact Exploration Tra nquilo Block

MARCOU_1

49

8A

6

3A

5

MANZANO_2

MANZANO

4

ZURDO_1

KERBER_1 / 2

ESPERANZA_3

ESPERANZA_2

ESPERANZA_1

DIANA_2

DIANA_1

GALES

MORRO CHICO

ESPERANZA

TN_1

5

4 3

98

76 2A2

TRANQUILO_1

SAN_JOSE_1

SAN_ANTONIO_1

EL_SALTO_1

KERBER

DIANA

MARCOU

Satellite ImageSatellite ImageDigital Elevation ModelDigital Elevation Model

CHILE

ARGENTINA

DIANA

KERBER

GALES

TranquiloTranquiloBlockBlock

MARCOU

ESPERANZA

10 km

Total UMR: 1,251 BCFAv. POS: 19%

Total UMR: 89 BCFAv. POS: 18%

Total UMR: 86 BCFAv. POS: 15%

3D ESPERANZA: 93 Km2

2D ESPERANZA – KERBER - GALES: 226 Km

2D DIANA: 144 Km

3D MARCOU: 70 Km2

• Total Area: 6648 Km2• 2D Seismic: 1428.3 Km• Total Wells: 23• Type of Contract: CEOP (Contrato Especial de Operacion

Petrolera)• Consortium (*): GeoPark 25%, Pluspetrol 25%, Winterhsall

25%, IFC 12.5% and Methanex 12.5%.• Operator: GeoPark.

• Work Program Commitment:

First Exploration Period (3 Years)1- Acquire, process & interpret 370 Km 2D Seismic2- Acquire, process & interpret 160 Sqkm 3D Seismic3- Drill 6 exploration Wells at the following depth:

600 (x2),800,1000,1700 & 2300 mbgl(*) Subject to Chilean Government approval.

Progress

23%

3D Esperanza Completed

100%

39%

2D Seismic (Diana, Gales, Kerber) Interrupted (to be restarted in Nov 2010)

3D Marcou (Cabo Negro) Interrupted (to be restarted in 2011)

2010 Update

9

High Impact Exploration Otw ay Block

• Total Area: 5965 Km2• 2D Seismic: 988.5 Km• Total Wells: 31• Type of Contract: CEOP (Contrato Especial de Operacion

Petrolera)• Consortium: GeoPark 25%, Pluspetrol 25%, Winterhsall 25%,

IFC 12.5% and Methanex 12.5%.• Operator: GeoPark.

• Work Program Commitment:

First Exploration Period (3 Years)1- Acquire 270 Sqkm 3D Seismic2- Drill 2 exploration wells (TD: 2200 & 3000m)

PATOS-1TRES PUENTES-1

LAS HOJAS-1

VULCANO_1

PARRILLAR_1

OTWAY_1

MINA_RICA_4

MINA_RICA_3 MINA RICA-2/2A

MINA_RICA_1

COREY_4

COREY_3

COREY_2

COREY_1

PRAT 1

PONSOMBY_1

KON_AIKE_2

KON_AIKE_1

GRIMAL_1

CHILENITA_1

ARACELIS_3

ARACELIS_2ARACELIS_1

CHILENITA_2

TRES BRAZOS-1

LEÑADURA-1

CANELOS 1

EL GANSO 1

PECKET

P-6

P-3P-4P-5

P-2PECKET 1

RIESCO

CABO NEGRO

OtwayOtwayBlockBlock

Satellite ImageSatellite ImageDigital Elevation ModelDigital Elevation Model

CHILENITA

ARACELIS-Pta. EUGENIA

RIO PESCADO

PRAT-Cta.CANDEM-CANELOS

10 km

Total UMR: 197 BCFAv. POS: 24%

Total UMR: 122 BCFAv. POS: 15%

Total UMR: 1,570 BCFAv. POS: 17%

Total UMR: 161 BCFAv. POS: 14%

2D ISLA RIESCO: 175 Km

3D CABO NEGRO: 270 Km2Progress

2D Seismic n/a (Isla de Riesco)

56%

2010 Update

3D Cabo Negro Interrupted (to be restarted in 2011)

10

New Opportunities Strategic Growth Partnership

A T L A

N T I C

O C

E A N

M A G A L L A N E S O F

LG International strategic growth partnership:

• Partnership with LGI to build a diversified risk-balanced portfolio of upstream projects across Latin America.

• Side by side acquisitions initially targeting US$ 100-500 million range size.

• GeoPark is General Manager of partnership and Operator of acquired projects.

• LGI contributes technical and financial strength.

• High flexibility: GeoPark participation in projects from 10 to 75% and LGI participation in projects from 25 to 90%

DEL MOSQUITO

TRANQUILO FELL

LOMA CORTADERAL

CERRO DOÑA JUANA

OTWAY

A T

L A

N T

I C

O C

E A

N

P A

C I

F I

C

O C

E A

N

COLOMBIA

BRAZILPERU

ARGENTINA

CH

ILE

DEL MOSQUITO

TRANQUILO FELL

LOMA CORTADERAL

CERRO DOÑA JUANA

OTWAY

A T

L A

N T

I C

O C

E A

N

P A

C I

F I

C

O C

E A

N

COLOMBIA

BRAZILPERU

ARGENTINA

CH

ILE

SOUTH AMERICA

GEOPARK OPERATED BLOCKS

SOUTH AMERICAGEOPARK OPERATED BLOCKS

CURRENT COUNTRIES

TARGET COUNTRIES+

H

H

M

M

L

LRangeValue

Prosp

ectivity-Upside

200 400

US$MMProject I

600

Project IV

Project VII

Project VIII

Project III

Project VI

Project II

Project V

Projects in Discussion

Projects UnderEvaluation

Projects BeingInitiated

Projects in Discussion

Projects UnderEvaluation

Projects BeingInitiated

11

Commitment Underpins Long Term Success

Creating a safe and organized workplace ensuring that everyone returns home from work everyday

without injury.

Respecting and protecting the region, laws, customs and people where we work – and creating real and sustainable opportunities and benefits for the local communities.

Performing with effort, quality and beyond our commitments to

continuously build market value for shareholders. Only a financially

healthy company can provide benefits for others.

Leaving the environment in the same or better natural condition than when

it was encountered.

SAFETY PROSPERITY

ENVIRONMENTCOMMUNITY

EMPLOYEESProviding the opportunity for

employees to grow professionally, contribute to and share in the

success of the Company.

CREATING VALUE BUSINESS MODEL

S.P.E.E.D.

12

Company Directory

Web Page: www.geo-park.com

E-mail: info@geo-park.com

Main Office

GEOPARK HOLDINGS LIMITED

Florida 981, 4th floor

1005 Buenos Aires, Argentina

Phone: (+54 11) 4312 9400

Operations Office

GEOPARK CHILE LIMITED

Maipú 979, Punta Arenas, Chile

Phone (+56 61) 617 210

Nominated Adviser & Broker

Oriel Securities Limited

125 Wood Street

London EC2V 7AN, United Kingdom

www.orielsecurities.com

Reporting Petroleum Engineers

DeGolyer and MacNaughton

5001 Spring Valley Road Suite 800 East

Dallas, Texas 75244, USA

www.demac.com

Solicitors

Norton Rose LLP

3 More London Riverside

London SE1 2AQ

www.nortonrose.com

Auditors

PricewaterhouseCoopers

1 Embankment Place

London WC2N 6RH

www.pwc.com