The document summarizes oil and gas production data from formations in the Cretaceous and Tertiary basins of northwest Argentina as reported to IAPG for December 2017. It provides production statistics like total current and accumulated production, average production per well, and number of current and historical producers for each reported formation by province. Geological column diagrams adapted from other sources are included to show the geological context of the formations.

1. Statistical Study of the Status of all Wells Registered as North West
Basin Producers as reported to the IAPG as “Capitulo IV” for
December 2017
ARGENTINA – DECEMBER 2017
THE NORTH WEST BASIN
A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com

2. MAIZ GORDO JUJUY 3,315 3,685 4,352 5 1,117,775 223,555 832,451 JCa.-23 CAIMANCITO 3 364
YACORAITE FORMOSA 3,887 4,176 4,490 8 226,038 28,255 154,975 Pp.Fr.RL-1001 RAMON LISTA 2 1,186
YACORAITE JUJUY 3,398 4,062 5,643 21 9,426,956 448,903 1,912,394 JCa.-08 CAIMANCITO 8 736
YACORAITE SALTA 1,978 3,455 6,129 75 4,044,371 53,925 374,808 P.Gu 9 PUESTO GUARDIAN 15 2,330
PALMAR LARGO FORMOSA 3,766 4,039 4,504 32 7,821,043 244,408 1,067,117 YPF.Fr.PL-18 PALMAR LARGO 10 5,650
Oil Production Best Oil Well
Average
To
No.ofHistoricalOil
Producers
Geological Column
Formation
Province
From
Well Depths (m)
CRETACEOUS BASIN
TotalCurrentOil
Production
(m3/month)
TotalAccumulated
Oil(m3)
Average
AccumulatedOil
(m3/well)
Maximum
AccumulatedOil
Well(m3)
Well
Field
Current Production
NumberofCurrent
OilProducers
CRETACEOUS BASIN – OIL PRODUCTION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant
Buenos Aires
Argentina
agwstark@gmail.com
Sistema de Información de Petróleo y Gas – Consulta Capítulo IV
Fecha de descarga 20-02-2018 a las 18:06
Período seleccionado 12/2017 a 12/2017
Cuenca NOROESTE
Ubicación ON SHORE
Vista por Pozo Formacion
Notes:
Geological Columns adapted from "Oil and Gas Journal, Argentina Salta blocks attractive despite earlier lack of success, 24/7/2006, by Autumn
Souders-Smith
Production reports as "Vulcanitas Medanito" is merged with ""Palmar Largo" formation
Production information is taken from the IAPG SIPG data base, Capitulo IV, for December 2017.
Information is taken at face value.

3. MAIZ GORDO JUJUY 3,315 3,685 4,352 5 412,142 82,428 208,889 JCa.-23 CAIMANCITO 3 90
YACORAITE FORMOSA 3,887 4,176 4,490 7 52,670 7,524 38,002 Pp.Fr.RL-1001 RAMON LISTA 2 348
YACORAITE JUJUY 3,398 4,062 5,643 21 2,585,787 123,133 504,118 JCa.-08 CAIMANCITO 8 178
YACORAITE SALTA 1,978 3,455 6,129 11 1,281,223 116,475 434,626
CGC.St.VMo.x-
1001(I)
VALLE MORADO 12 231
PALMAR LARGO FORMOSA 3,766 4,039 4,504 32 1,194,724 37,335 147,875 YPF.Fr.PL.x-1 PALMAR LARGO 10 1,729
Best Gas Well
From
Average
To
No.ofHistorical
GasProducers
Maximum
AccumulatedGas
Well(Mm3)
Well
Field
Formation
Province Geological Column
Well Depths (m) Gas Production
TotalAccumulated
Gas(Mm3)
Average
AccumulatedGas
(Mm3/well)
CRETACEOUS BASIN
Current Production
TotalCurrentGas
Production
(Mm3/month)
NumberofCurrent
GasProducers
CRETACEOUS BASIN – GAS PRODUCTION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant
Buenos Aires
Argentina
agwstark@gmail.com
Sistema de Información de Petróleo y Gas – Consulta Capítulo IV
Fecha de descarga 20-02-2018 a las 18:06
Período seleccionado 12/2017 a 12/2017
Cuenca NOROESTE
Ubicación ON SHORE
Vista por Pozo Formacion
Notes:
Geological Columns adapted from "Oil and Gas Journal, Argentina Salta blocks attractive despite earlier lack of success, 24/7/2006, by Autumn
Souders-Smith. The reported accumulated production from BHP.St.VMo.x-1001 of 4,346,261 Mm3 in 816 days is though to be erroneous and has
not been considered. Production information is taken from the IAPG SIPG data base, Capitulo IV, for December 2017. Information is taken at face
value.

4. TARIJA BASIN – OIL PRODUCTION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
TRANQUITAS SALTA 556 1,031 4,295 29 406,434 14,015 79,765 TPT.St.CD-1011
CAMPO DURAN
(TRANQUITAS)
1 1,796
SAN TELMO SALTA 690 2,925 4,295 10 211,639 21,164 48,062 TPT.St.CDS.x-1
CAMPO DURAN SUR (SAN
TELMO - LAS PEÑAS)
1 4
LAS PEÑAS SALTA 78 908 3,895 70 1,222,340 17,462 141,039 YPF.St.Lo.a-103 LOMITAS BLOQUEBAJO 5 678
TARIJA SALTA 93 915 2,396 98 738,858 7,539 93,793 T-125 TRANQUITAS SOMEROS - -
TUPAMBI SALTA 164 2,747 5,332 149 15,918,976 106,839 598,398 CD-14 CAMPO DURAN (TUPAMBI) 15 5,335
IQUIRI SALTA 1,337 1,980 3,089 4 74,955 18,739 50,851 YPF.St.Mac.x-1 MACUETA - -
LOS MONOS SALTA 778 2,161 5,597 2 35,322 17,661 35,244 BRI.St.Yac.x-1001 YACUY - -
HUAMAMPAMPA SALTA 3,010 4,378 6,179 44 14,283,058 324,615 994,072 Pp.St.R-1004 RAMOS 21 6,534
ICLA SALTA 3,429 4,510 5,827 8 1,420,343 177,543 1,194,166
PAE.St.Mac.x-1001
bis
MACUETA 6 5,433
SANTA ROSA SALTA 3,566 4,682 5,827 11 350,383 31,853 92,700 Pp.St.R-1003-h RAMOS 6 79
OTROS SALTA 377 1,663 5,490 33 744,450 22,559 110,282 YPF.St.Or.es-1
POZOS SIN YACIMIENTO
(AGUARAGÜE)
- -
Field
Formation
Province
Geological Column
Well Depths (m) Oil Production Best Oil Well
From
Average
To
No.ofHistorical
OilProducers
TotalAccumulated
Oil(m3)
Average
AccumulatedOil
(m3/well)
Maximum
AccumulatedOil
Well(m3)
Well
TARIJA BASIN
Current Production
NumberofCurrent
OilProducers
TotalCurrentOil
Production
(m3/month)
Notes:
Geological Columns adapted from "Oil and Gas Journal, Argentina Salta blocks attractive despite earlier lack of success, 24/7/2006, by Autumn
Souders-Smith. Production information is taken from the IAPG SIPG data base, Capitulo IV, for December 2017. Information is taken at face value.
Prepared by: A.G.W. Stark
Consultant
Buenos Aires
Argentina
agwstark@gmail.com
Sistema de Información de Petróleo y Gas – Consulta Capítulo IV
Período seleccionado 12/2017 a 12/2017

5. TRANQUITAS SALTA 556 1,031 4,295 28 628,788 22,457 530,795 TPT.St.CD-1011
CAMPO DURAN
(TRANQUITAS)
1 16,519
SAN TELMO SALTA 690 2,925 4,295 10 1,434,766 143,477 348,418 TPT.St.CD-1002
CAMPO DURAN (SAN
TELMO - LAS PEÑAS)
1 25
LAS PEÑAS SALTA 78 908 3,895 57 1,261,823 22,137 594,298 CD-45
CAMPO DURAN (SAN
TELMO - LAS PEÑAS)
5 334
TARIJA SALTA 93 915 2,396 50 122,314 2,446 17,296 T-125 TRANQUITAS SOMEROS - -
TUPAMBI SALTA 164 2,747 5,332 134 49,233,117 367,411 2,152,472 CD-18 CAMPO DURAN (TUPAMBI) 15 25,173
IQUIRI SALTA 1,337 1,980 3,089 4 29,188 7,297 20,679 YPF.St.Mac.x-1 MACUETA - -
LOS MONOS SALTA 778 2,161 5,597 1 24,530 24,530 24,530 BRI.St.Yac.x-1001 YACUY - -
HUAMAMPAMPA SALTA 3,010 4,378 6,179 45 119,055,399 2,645,676 9,903,386 Pp.St.R-1004 RAMOS 21 77,602
ICLA SALTA 3,429 4,510 5,827 8 12,010,133 1,501,267 9,781,940
PAE.St.Mac.x-1001
bis
MACUETA 6 59,821
SANTA ROSA SALTA 3,566 4,682 5,827 11 6,666,009 606,001 1,684,279
TPT.St.Ag.xp-
1(ST4)
SIERRA DEAGUARAGÜE
(SANTA ROSA ICLA)
6 11,150
OTROS SALTA 377 1,663 5,490 315 341,211 1,083 35,749 RP-6 RIO PESCADO - -
Formation
Province
Geological Column
Well Depths (m)
TARIJA BASIN
Current ProductionBest Gas Well
From
Average
To
No.ofHistorical
GasProducers
TotalAccumulated
Gas(Mm3)
Average
AccumulatedGas
(Mm3/well)
Maximum
AccumulatedGas
Well(Mm3)
Well
Field
Gas Production
NumberofCurrent
GasProducers
TotalCurrentGas
Production
(Mm3/month)
TARIJA BASIN – GAS PRODUCTION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Notes: Geological Columns adapted from "Oil and Gas Journal, Argentina Salta blocks attractive despite earlier lack of success, 24/7/2006, by Autumn
Souders-Smith. Production information is taken from the IAPG SIPG data base, Capitulo IV, for December 2017. Information is taken at face value.
Prepared by: A.G.W. Stark
Consultant
Buenos Aires
Argentina
agwstark@gmail.com
Sistema de Información de Petróleo y Gas – Consulta Capítulo IV
Período seleccionado 12/2017 a 12/2017

6. CRETACEOUS BASIN – PRODUCERS REPORTED FROM THE MAIZ GORDO
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos
en el Noroeste Argentino, Luis Anfres Alvarez”.
Mapa paleográfico para la Cuenca Cretácica-
terciaria (adaptado de Gomez Omil et al 1989)
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
JUJUY 5 1,117,775 223,555 5 412,142 82,428
CAIMANCITO

7. CRETACEOUS BASIN – PRODUCERS REPORTED FROM THE YACORAITE
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos
en el Noroeste Argentino, Luis Anfres Alvarez”.
Mapa paleográfico para la Cuenca Cretácica-
terciaria (adaptado de Gomez Omil et al 1989)
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
FORMOSA 8 226,038 28,255 7 52,670 7,524
JUJUY 21 9,426,956 448,903 21 2,585,787 123,133
SALTA 75 4,044,371 53,925 11 1,281,223 116,475
PUESTO GUARDIAN
PALMAR LARGO

8. CRETACEOUS BASIN – PRODUCERS REPORTED FROM THE PALMAR LARGO VOLCANICS
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos
en el Noroeste Argentino, Luis Anfres Alvarez”.
Mapa paleográfico para la Cuenca Cretácica-
terciaria (adaptado de Gomez Omil et al 1989)
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
FORMOSA 32 7,821,043 244,408 32 1,194,724 37,335
PALMAR LARGO

9. TARIJA BASIN – PRODUCERS REPORTED FROM THE TRANQUITAS FORMATION (TERTIARY)
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 29 406,434 14,015 28 628,788 22,457
AGUARAGÜE -TRANQUITAS SOMEROS
CAMPO DURAN

10. TARIJA BASIN – PRODUCERS REPORTED FROM THE SAN TELMO FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 10 211,639 21,164 10 1,434,766 143,477
AGUARAGÜE - CAMPO DURAN
ACAMBUCO - MACUETA SUR

11. TARIJA BASIN – PRODUCERS REPORTED FROM THE LAS PEÑAS FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 70 1,222,340 17,462 57 1,261,823 22,137
AGUARAGÜE TRANQUITAS SOMEROS

12. TARIJA BASIN – PRODUCERS REPORTED FROM THE TARIJA FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 98 738,858 7,539 50 122,314 2,446
ACAMBUCO, AGUARAGÜE, RAMOS, SAN ANTONIO
SUR

13. TARIJA BASIN – PRODUCERS REPORTED FROM THE TUPAMBI FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 149 15,918,976 106,839 134 49,233,117 367,411
ACAMBUCO, AGUARAGÜE, RAMOS, SANTA
VICTORIA, TARTAGAL ORIENTAL

14. TARIJA BASIN – PRODUCERS REPORTED FROM THE IQUIRI FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 4 74,955 18,739 4 29,188 7,297
ACAMBUCO MACUETA

15. TARIJA BASIN – PRODUCERS REPORTED FROM THE LOS MONOS FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 2 35,322 17,661 1 24,530 24,530
ACAMBUCO, AGUARAGÜE
RAMOS, SANTA VICTORIA

16. TARIJA BASIN – PRODUCERS REPORTED FROM THE HUAMAMPAMPA FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 44 14,283,058 324,615 45 119,055,399 2,645,676
ACAMBUCO, AGUARAGÜE, SAN ANTONIO SUR,
RAMOS

17. TARIJA BASIN – PRODUCERS REPORTED FROM THE ICLA FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 8 1,420,343 177,543 8 12,010,133 1,501,267
RAMOS
ACAMBUCO

18. TARIJA BASIN – PRODUCERS REPORTED FROM THE SANTA ROSA FORMATION
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 11 350,383 31,853 11 6,666,009 606,001
AGUARAGÜE
RAMOS

19. TARIJA BASIN – PRODUCERS REPORTED FROM OTHER FORMATIONS
ARGENTINA – DECEMBER 2017 – NORTH WEST ARGENTINA
Prepared by: A.G.W. Stark
Consultant – Buenos Aires - Argentina
agwstark@gmail.com
Figure adapted from “Geología de Hidrocarburos en el Noroeste Argentino,
Luis Anfres Alvarez”. Mapa estructural del Noroeste Argentino”, adaptado
de Starck et al, 1990
Province
No. of
Historical
Oil
Producers
Total
Accumulated
Oil (m3)
Average
Accumulated
Oil (m3/well)
No. of
Historical
Gas
Producers
Total
Accumulated
Gas (Mm3)
Average
Accumulated
Gas
(Mm3/well)
SALTA 33 744,450 22,559 315 341,211 1,083
RIO PESCADO