Giant fields of the late 80s associated with type [open quotes]A[close quotes] subduction in South America

Conference · Mon Feb 01 00:00:00 EST 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5941989

Duval, B; Cramez, C ^[1]; Figuera, J ^[2]; Lander, R ^[3]; Hernandez, G ^[4]

---

1. Total, Paris (France)
2. Moraven, Caracas (Venezuela)
3. Corpoven, Puerto La Cruz (Venezuela)
4. Lagoven, Caracas (Venezuela)

About 10 billion bbl of recoverable oil have been found in these three fields for which the petroleum generating subsystem is very similar. The potential source rocks are the organic sediments associated with the major downlap surface of the post-Pangea continental encroachment sedimentary cycle, i.e., MFS 91, 5 Ma (La Luna formation). However, the concentrating physico-chemical petroleum subsystem is quite different. The El Furrial/Musipan field is associated with a Tertiary foredeep basin overlying a generating Atlantic type passive margin. On the other hand, Cusiana and Ceuta fields are associated with a Tertiary foredeep basin developed over a generating back-arc basin. The different stacking of sedimentary basins controls the migration/entrapment petroleum subsystem. In El Furrial/Musipan, decollement surfaces and their associated thrusts are predominant whereas, in Ceuta and Cusiana the majority of compressional structures are created by tectonic inversions. These tectonic settings create different petroleum systems: (a) supercharged with low impedance and lateral drainage in El Furrial/Musipan, (b) normally charged with high impedance and vertically drained in Ceuta and Cusiana area. Each case requires appropriated exploration approaches.

• OSTI ID: 5941989
• Report Number(s): CONF-930306-; CODEN: AABUD2
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 77:2; Conference: International congress of the American Association of Petroleum Geologists (AAPG), Caracas (Venezuela), 14-17 Mar 1993; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
SEDIMENTARY BASINS
ORIGIN
SOURCE ROCKS
SEDIMENTATION
VENEZUELA
RESOURCE POTENTIAL
GEOLOGIC FAULTS
GEOLOGIC TRAPS
MIGRATION
PETROLEUM DEPOSITS
PLATE TECTONICS
RESERVES
RESOURCE ASSESSMENT
SOUTH AMERICA
SUBDUCTION ZONES
TERTIARY PERIOD
CENOZOIC ERA
DEVELOPING COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
LATIN AMERICA
MINERAL RESOURCES
RESOURCES
TECTONICS
020200* - Petroleum- Reserves
Geology
& Exploration