Oil and Gas Exploration and Production in Northern Mexico

1. EXPLORACIÓN Y PRODUCCIÓN REGIÓN NORTE Oil and Gas Exploration and Production in Northern Mexico Alfredo E. Guzmán Pemex Exploración y Producción

2. Contents • Introduction • Gas Business • Oil Business • Conclusions

3. Mexico´s oil and Gas Basins Gulf of California Chihuahua California Sabinas Burgos Gulf of Mexico Tampico Extensional Faults Belt Sierra Madre Oriental Misantla Fold and Thrust belt Sonda de Campeche Litoral Tabasco Veracruz Salina del Istmo Macuspana Reforma Chiapas Oil Gas

4. Discovered Oil and Gas (01/01/02) Oil (bbo) 279.6 28.7 38.3 212.6 10% 14% 76% Gas (tcf) 225.8 48.5 69.1 21% 106.9 30% 49% Original discovered volumes Remnant Reserves 3P Cumulative production Unrecoverable Volumes Source: E&P Planning

5. Reserves bboe (01/01/02) 52.9 10.2 3.3* Gas 11.9 14.6* 6.9 3.0* 30.8 8.9 7.5 8.4* Crude oil 38.3 22.4 Total, 3P Possible Probable Proven, 1P * includes condensates and plant liquids Source: E&P Planning

6. México´s Oil and Gas Production (9/2002) • Oil mbod • Natural gas mmcfd Heavy 2,141 Light 1,028 3,169 Assoc. 3,133 Non asso. 1,306 4,439 In 2003: 3,550 82% Offshore In 2003: 4,820 66% Onshore Source: E&P Planning

7. Gas Production 2001 - 2010 (mmcfd) Demand New developments Burgos Grijalva Delta Cantarell Base Source: E&P Planning

8. Oil Production 2001 - 2010 (mbod) New developments Cantarell Base Source: E&P Planning

9. Annual Budget – PEMEX E&P (million DLS) 2001 2002 2003 2,282 2,389 OPEX 1,938 10,417 5,111 7,048 CAPEX TOTAL 7,049 9,437 12,699

10. Pemex Corporativo PEMEX Organization Pemex Exploración y Producción Pemex Refinación Pemex Gas y Petroquímica Básica Pemex Petroquímica Pemex Internacional North South Southwest Offshore Northeast Offshore • The North Region covers more than 50% of the national territory

11. The North Region Oil and Gas Reserves: • 21,043 MMBOE (39% of total). • 39,798 BCF of Natural Gas, (First Place). 2001 Production: • 1.238 BCFD of Gas (27%) • 78.5 MBD of Oil (2.5%) 2001 Revenue: • 2,077 MMUSD (8%) 2002 Investment: • 1,659 MMUSD (16%)

12. Gas Business • 1993-2001 National Growth: 1.1 BCFD (23%) • North Region Growth: 825 MCFD (75% of total) • By 2005 the North Region will have the largest participation 1993-2001 6,834 6,001 (13%) 5,363 5,080 (13%) 4,796 4,791 4,511 4,679 4,467 4,195 812 (18%) 3,759 3,625 3,576 (36%) 718 (16%) 1,743 (38%) 2,583 2,154 1,674 1,300 1,266 1,238 1,225 (38%) 1,038 773 (27%) 643 548 441 479 93 94 95 96 97 98 99 00 01 02 03 04 05 REGIÓN MARINA SUROESTE REGIÓN MARINA NORESTE REGIÓN NORTE REGIÓN SUR

13. Gas Business Where is the growth coming from? Projects • 5 On-shore • 4 Off-shore

14. Laredo Area 49,000 Km2 Reynosa Gas Business Burgos Basin Project Production History 1945 First Production Mision Field 1970 Max production, 620 MMCFD 76-79 Sabinas Basin development 1993 Minimum production 215 MMCFD

15. Gas Business Burgos Basin Project 94-95 Feasibility Study, doubled production to 420 MMCFD. 1997 Burgos Basin Project 1999 Reached 1.0 BCFD Current Production 1,010 MMCFD MMCFD Laredo Reynosa

16. Golfo de México Veracruz Aliento -1 Tejeda -1 Cópite Camaronero -1A Chilpaya -1 Acagual -1, DL1 M.Pionche Playuela -1 Cardúmenes -1 M.Violín -1 Mecayucan Cuatas -1 Cosomapa -1 Cocuite Angostura Guinea -1 Lizamba -1 Perdiz -1 Chalpa -1 Mirador San Pablo Palmichal -1 Novillero Gas Business Veracruz Basin Project • 15,000 km2 • Resources 7 TCF • Reserves1.9 TCF • Tertiary and Mesozoic opportunities • Low production costs Production Profile * 615 MMCFD New Fields (Exploration) Field Development Base * Conservative

17. Gas Business Veracruz Basin Project Veracruz ALIENTO 1100 KM2 Golfo de México CAMARONERO 300 KM2 Tejeda -1 Cópite Acagual -1 M.Pionche Playuela -1 Alvarado Mecayucan Cosomapa -1 C. Cocuite COSOMAPA 302 KM2 Perdiz -1 Playuela Field Lizamba -1 ZAFIRO-PERDIZ 1510 KM2 Chalpa -1 Tertiary Basin R.Pacheco San Pablo Mesozoic Area Novillero In acquisition Success Ratio: 65% Mesozoic folded belt - - 1 1 LOC. ACAGUAL LOC. ACAGUAL - - 1 1 Program • Drill 17 Exploratory wells • 300 Development wells • Reach 600 MMCFD

18. ILD NPHI RHOB DT DTSM GR 1850 1,845 m 1900 Efecto de Gas ,2,010 m 1950 2000 Gas Business Veracruz Basin Project • Amplitude driven • Sand gas effect (DHI) Well: Playuela-301 14 MMSCFD Initial rate: Reserves (BCF) 40 3P 27 2P Upper Miocene 8 1P

19. Gas Business Off-shore Projects • Shallow water dephts • Nearfacilities • High quality sands • Extensional faults structures Delta del Bravo 32 More than 150 exploratory opportunities 31 Lamprea 81 Lankahuasa-1 10 Lankahuasa Lankahuasa-1 Veracruz Marino

20. PUNTA MATA CA╤A ISLA PUNTA LOS PAJAROS AGUA DULCE G o l f o d e M é x i c o BOCA TANCONCHIN ISLA EL IDOLO FAJA DE ORO Ensenada Martφnez AKZUYUT - 1 PUNTA ARENAS LICHANAT-1 MATANCU - 1 BARRA GALINDO TAMAKNI - 1 TAZIOL-1 REMORA-1 UXUM-1 HUAYA-1 AKACHOC-1 LANKAHUASA NORTE TUXPAN BARRA DE TUXPAN CHACAN-1 AXIT-1 LANKAHUASA PROFUNDO CUXI-1 BARRA DE CAZONES JUN-1 PUYU-1 PATUX-1 UXPI-1 TUCAYAN-1 POZA RICA Barra de Tenixtepec BARRA BOCA DE ENMEDIO PIXCAL-1 CHULA 1 LIMETA BARRA BOCA DE LIMA LOC. CALLIMAXTLA 1 QUITXCA CHIHUIX 1 Tecolutla HUAPA 1 NACÚ BARRA TECOLUTLA PULAKTUMIN 1 Rio Tecolutla GUTIERREZ LANKAHUASA ZAMORA KAYAN 1 IXPIYUT 1 SEKNA Barra Riachuelos KOYUT CHULUX SILAKNI ACUNCALIN IXCATAN 1 LANKA NTE. MALHATEN JILI PULHMAN XOKE LOC.CAHUIN-1 Estero Pedernales Bocas Tres LOC. KOSNI-1 BARRA DE NAUTLA Isla Los Esteros LANKA CENTRO Torre Blanca Nautla Guadalupe Palmar A. Negro A. Negro TAXTUNU LITAY LANKAHUASA SUR LACATZU BARRA DE PALMAS LANKA-DL1 LOC. SIHINI-1 Bobos Bobos SKO Lankahuasa-1 CAXTUM BARRA NUEVA TAXCAT L. Grande Vega de Alatorre BARRA DOMINGAL SKATA-1 PUZMAN-1 HUATIC-1 Colida Colida Miraflores STAYAN-1 CANATLA-1 E. Carranza MAGNI-1 KAXAK BARRA SAN AGUSTIN AXCUT-1 L. San Agustin GASODUCTO 48" BARRA SANTA ANA STAPU TAKANU MUNTZAYA-1 JACAN LOKO-1 PUNTA LOMA JINK-1 LOC. CAHUAN-1 L. Verde XTAN-1 CHAUN-1 XANAT-1 PUNTA VILLA RICA CAÑONERO L. E Llano LOC. TICU-1 LOC. CAÑONERO-1 L. Farallon PUNTA PUNTA MANCHA L. La Mancha TUMIN-1 KOLOTZIN MISIN-1 LOC. CHICINI-1 KOTAN-1 CHUN-1 PUXKA-1 PUNTA ZEMPOALA PLAYA CHACHALACAS Gas Business Lankahuasa Project • Lankahuasa-1 discovery well • Target depths: 1500-3000 m. • Pliocene - Miocene shelf plays • Amplitude driven ? Indio SAN RAFAEL Cruz Blanca Marφa de la Torre Rio Bobos

21. Prospect Lankahuasa Norte Prospect Lankahuasa Centro N S Lankahuasa-1 Productive zone Gas Business Lankahuasa structure 45 Km • Northward continuity of producing horizons from Lankahuasa-1 Potential zones

22. Gas Business Lankahuasa-1 discovery well • Sweet Dry Gas 1938-1950 • Low resistivity sands 1970-1985 • 6 producing sands • 20 additional sands 2086-2099 2115-2125 2135-2149 2163-2182 Qg=3.4 mmscfd 2238-2244 Qg=26.5 mmscfd 2380-2390 Qg= 2.0 mmscfd 2496-2507 Qg= 22.6 mmscfd 2533-2542 2558-2568 Qg= 15.4 mmscfd 2622-2633 Tested 2722-2732 Pending TD 3,139 mbrt

23. PATUX PATUX - - 1 1 CHULA 1 CHULA 1 LIMETA LIMETA LOC. CALLIMAXTLA 1 LOC. CALLIMAXTLA 1 QUITXCA QUITXCA CHIHUIX 1 CHIHUIX 1 HUAPA 1 HUAPA 1 NACÚ NACÚ PULAKTUMIN 1 PULAKTUMIN 1 KAYAN 1 KAYAN 1 IXPIYUT 1 IXPIYUT 1 SEKNA SEKNA KOYUT KOYUT CHULUX CHULUX SILAKNI SILAKNI ACUNCALIN ACUNCALIN IXCATAN 1 IXCATAN 1 LANKA NTE. LANKA NTE. MALHATEN MALHATEN JILI JILI PULHMAN PULHMAN XOKE XOKE LOC.CAHUIN LOC.CAHUIN - - 1 1 LOC. KOSNI LOC. KOSNI - - 1 1 LANKA CENTRO LANKA CENTRO TAXTUNU TAXTUNU LITAY LITAY LACATZU LACATZU LANKA LANKA - - DL1 DL1 LOC. SIHINI LOC. SIHINI - - 1 1 SKO SKO CAXTUM CAXTUM STAPU STAPU TAKANU TAKANU JACAN JACAN LOC. TICU LOC. TICU - - 1 1 LOC. CAÑONERO LOC. CAÑONERO - - 1 1 TUMIN TUMIN - - 1 1 KOLOTZIN KOLOTZIN MISIN MISIN - - 1 1 LOC. CHICINI LOC. CHICINI - - 1 1 KOTAN KOTAN - - 1 1 CHUN CHUN - - 1 1 PUXKA PUXKA Gas Business Lankahuasa’s potential resources (tcf): Lankahuasa Cube (1,800 Km²): 10,800 Km² PUNTA MATA CA?A PUNTA MATA CA?A ISLA ISLA PUNTA PUNTA P90 : 2 Pm : 14 P10 : 14 LOS PAJAROS LOS PAJAROS AGUA DULCE AGUA DULCE BOCA TANCONCHIN BOCA TANCONCHIN ISLA ISLA EL IDOLO EL IDOLO Ensenada Ensenada Martφnez Martφnez AKZUYUT AKZUYUT - - 1 1 PUNTA PUNTA ARENAS ARENAS LICHANAT LICHANAT 1 1 Gulf of Mexico MATANCU MATANCU - - 1 1 - - BARRA GALINDO BARRA GALINDO TAMAKNI TAMAKNI 1 1 - - TAZIOL TAZIOL 1 1 REMORA REMORA - - 1 1 UXUM UXUM 1 1 - - HUAYA HUAYA 1 1 AKACHOC AKACHOC 1 1 Lankahuasa Complex Chihuix Complex TUXPAN TUXPAN BARRA DE TUXPAN BARRA DE TUXPAN CHACAN CHACAN 1 1 - - - - - AXIT AXIT 1 1 CUXI CUXI 1 1 - - - - BARRA DE CAZONES BARRA DE CAZONES JUN JUN - - 1 1 PUYU PUYU 1 1 P90 : 0.8 Pm : 5 P10 : 11 UXPI UXPI - - 1 1 - - - - TUCAYAN TUCAYAN - - 1 1 POZA RICA Barra Barra de de Tenixtepec Tenixtepec BARRA BOCA DE ENMEDIO BARRA BOCA DE ENMEDIO Lankahuasa Complex PIXCAL PIXCAL - - 1 1 BARRA BOCA DE LIMA BARRA BOCA DE LIMA Tecolutla Tecolutla BARRA TECOLUTLA BARRA TECOLUTLA Tecolutla Tecolutla Rio Rio GUTIERREZ GUTIERREZ ZAMORA ZAMORA Barra Riachuelos Barra Riachuelos Estero Estero Pedernales Pedernales Bocas Bocas Tres Tres BARRA DE NAUTLA BARRA DE NAUTLA Isla Isla Los Los Esteros Esteros Torre Torre Blanca Blanca Kosni Complex Guadalupe Guadalupe Palmar Palmar Nautla Nautla A. Negro A. Negro A. Negro A. Negro BARRA DE PALMAS BARRA DE PALMAS Xoke Complex Bobos Bobos Bobos Bobos Lankahuasa Field Litay Complex BARRA NUEVA BARRA NUEVA TAXCAT TAXCAT L. Grande L. Grande Vega de Vega de Alatorre Alatorre BARRA DOMINGAL BARRA DOMINGAL SKATA SKATA 1 1 PUZMAN PUZMAN 1 1 HUATIC HUATIC - - 1 1 Colida Colida Colida Colida Miraflores Miraflores STAYAN STAYAN 1 1 CANATLA CANATLA - - 1 1 Indio E. E. Carranza Carranza MAGNI MAGNI - - 1 1 - - KAXAK KAXAK BARRA BARRA SAN AGUSTIN SAN AGUSTIN AXCUT AXCUT - - 1 1 L. San Agustin L. San Agustin BARRA BARRA SANTA ANA SANTA ANA - - SAN RAFAEL MUNTZAYA MUNTZAYA 1 1 - - Lankahuasa-1 LOKO LOKO 1 1 PUNTA LOMA PUNTA LOMA Cruz JINK JINK 1 1 Blanca Marφa P90 : 0.7 Pm : 1.6 P10 : 2.7 de la Torre Rio Bobos LOC. CAHUAN LOC. CAHUAN 1 1 - - L. Verde L. Verde XTAN XTAN 1 1 CHAUN CHAUN - - 1 1 - - XANAT XANAT - - 1 1 PUNTA PUNTA VILLA RICA VILLA RICA - - L. E Llano L. E Llano - - L. L. Farallon Farallon PUNTA PUNTA PUNTA PUNTA MANCHA MANCHA - - L. La L. La Mancha Mancha - - 1 1 PUNTA PUNTA ZEMPOALA ZEMPOALA PLAYA PLAYA CHACHALACAS CHACHALACAS Lankahuasa field reserves (2P): 683 BCF

24. Oil Business Oil Projects Development Project • Chicontepec Off-shore Exploratory Projects • Sardina • Cazones • Deep GoM • Perdido Area Field Optimization Projects • Arenque (off-shore) • Golden Lane (off-shore) • Poza Rica • San Andrés • Tamaulipas-Constituciones • Tres Hermanos

25. GALLO 1D GALLO 1D Tuxpan Tuxpan OVEJS 1 OVEJS 1 GALLO 2 GALLO 2 2 5 COSMS 1 COSMS 1 CHIC020 CHIC020 4 Poza Rica Poza Rica 3 MECAPALAPA MECAPALAPA CHIC030 CHIC030 AGFRA 813 AGFRA 813 - - D D AGFRA 868 AGFRA 868 - - D D 1 CHIC036 CHIC036 CHIC040 CHIC040 CHIC039 CHIC039 Oil Business Chicontepec Project • OOIP: 139,163 MMBOE • Mexico’s largest oil reserves (3P): 12,189 MMB Production Profile • Natural Gas Reserves: 31.3 TCF Oil (MBD) Área 5 Área 4 Área 3 Área 2 Área 1 Gas (MMCFD) Área 5 Área 4 • 3,731 km2 Área 3 Área 2 • 952 wells Área 1

26. Discordance Chicontepec play Reef. Upper Cretacic Upper Jurassic Basament Oil Business Chicontepec Project • Low permeability Sandstones • Large sand bodies • Low Recovery Factors • Oil 7 -10% • Gas 60 - 70% • Oil densities: 18- 45° API Superlight 2 Chicontepec ¨basin¨ Light W E 1 Oil quality map

27. Thickness > 100 m Oil Business Chicontepec Project Development Plan: Area (Km²) Depth (m) °API Development wells Reentries 1,655 1,600-2,000 26-45 12,375 170 Approved Capex 2002-2006: 5,820 MM$ Investment Strategy Whole Project 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012-28 T o t a l 525 50 503 50 560 50 560 50 560 50 7,680 80 1,450 300/12,367 732 3D seismic (Km2) Approved Wells/prog. Work overs 270 11/18 8 1,180 91/363 134 105/619 134 93/555 76 427 50 Capex required (MMUSD) • Drilling • Facilities • Others • Total 33.7 3.7 25.0 62.4 511.9 184.1 45.0 741.0 835.6 310.5 55.0 1,201 755.5 285.9 56.3 1,097.7 575.2 241.2 45.3 861.7 706.8 197.0 51.2 955.0 705.9 147.6 49.5 903.1 755.5 262.0 59.2 1,076.7 759.9 274.7 65.9 1,100.5 761.2 274.7 70.5 1,106.4 10,440.7 3,768.3 3,717.9 17,926.9 16,842.0 5,966.7 4,223.8 27,032.6

28. Oil Business Off-shore Exploratory Projects Sardina - Cazones • Shallow water depths • More than 50 opportunities • Light oil Deep GoM and Perdido Area • Water depths up to 10,000 ft. • 126 opportunities • Turbidites, minibasins and salt related plays Carpa-101 NE SW

29. Oil Business Field Optimization Projects • Infield and extension drilling • Artificial systems • Water flood systems optimization Remnant Reserve (MMBOE) System °API Poza Rica 869 Water injection 32 Arenque 141 Water injection 34 San Andrés 133 Water injection 28 Tamps-Constituciones 128 Water injection 20 Golden Lane 44 37 Tres Hermanos 21 27

30. Conclusions México´s oil and gas requirements will be met by the North Region Challenges: • Capex • Cycle times • Capacity of execution • Costs • Technology • Permitting • Environment • Safety • Community relations • Workers Union relations

31. EXPLORACIÓN Y PRODUCCIÓN