Thermal modeling in Ceuta, Maracaibo Basin, Venezuela

Conference · Mon Feb 01 04:00:00 EST 1993 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:6104908

Marcano, F; Padron, S ^[1]

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1. Maraven S.A., Caracas (Venezuela)

Hydrocarbon generation from Upper Cretaceous source rocks (Fm.La Luna) in Ceuta, center-eastern Maracaibo lake area in Venezuela, is modeled here, using a kinetic method and the conventional Time-Temperature Index (TTI) procedure. Geological evolution, burial and erosional history is based on available interpretation of 3D seismic and well data. Fragmentary present-day subsurface temperature data comes from corrected measurements in a few wells. Paleogradient/heat paleoflux was estimated during the thermal modeling on wells, by calculating vitrinite reflectances (Ro) or Tmax values and then comparing them with measured ones. However, thermal-indicator data does not always appear to be consistent and some data had to be rejected. Paleogradient evolution in the Cretaceous is controlled by the development of a isolated thermal compartment related to overpressures in a thick shaly sequence in the Upper Cretaceous. A geological section was studied in detail to illustrate possible migration paths to known fields and undrilled traps. Results show a good fit between the thermal evolution of the source rock and the maturity of the crude produced in the area.

• OSTI ID: 6104908
• Report Number(s): CONF-930306--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 77:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
DEVELOPING COUNTRIES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC TRAPS
HYDROCARBONS
LATIN AMERICA
MIGRATION
MINERAL RESOURCES
ORGANIC COMPOUNDS
PALEOTEMPERATURE
PETROLEUM DEPOSITS
PRODUCTION
RESOURCES
SOURCE ROCKS
SOUTH AMERICA
TEMPERATURE GRADIENTS
TEMPERATURE LOGGING
THREE-DIMENSIONAL CALCULATIONS
VENEZUELA
WELL LOGGING