Exploration of the Late Cretaceous and the Oligocene sequences underneath the Pirital allochthonous block, Northern Monagas area, Eastern Venezuela Basin

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

OSTI ID:6108280

Lander, R; Gonzalez, A; Fuentes, J; Daal, J ^[1]

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1. Exploration Management, Corpoven S.A., Caracas (Venezuela)

The search for reservoir rock beneath the Pirital allochthonous block began when the Mene Grande Oil Company drilled 7 exploratory wells. These penetrated the Pirital allochthonous block, but, due to mechanical problems, they did not reach their objective. At that time, the proposed exploratory model suggested a high angle reverse fault at the base of the allochthonous block which restricted the prospective section toward the north. In 1989, after drilling 11 exploratory wells along the El Furrial-El Tejero trend, a new exploratory model was proposed. The base of the Pirital block is a sub-horizontal plane and the Late Cretaceous and Oligo-Early Miocene sediments are extended northward beneath it. A well, SBC-3E, was drilled in order to test the new model and it was completed in December, 1989. It produced 6100 BOPD of 35[degrees] API and 47 MMCFD. A second well, PIC-IE, located 7.5 km toward the northwest of the SBC-3E, was drilled in order to investigate the quality of the reservoir rocks beneath the Pirital block. This well was completed in April, 1992, with a production of 4500 BOPD of 36[degrees] API and 37 MMCFD. The success of these two wells drilled north of the Pirital thrust suggest an exploratory area as big as the El Furrial-El Tejero trend. However, two geological risks must be addressed, the thickness of the allochthonous block and the depth of the oil-producing strata.

• OSTI ID: 6108280
• 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
CENOZOIC ERA
CRETACEOUS PERIOD
DEPTH
DEVELOPING COUNTRIES
DIFFUSION BARRIERS
DIMENSIONS
EXPLORATION
EXPLORATORY WELLS
GEOLOGIC AGES
GEOLOGIC MODELS
GEOLOGIC STRATA
GEOLOGIC STRUCTURES
LATIN AMERICA
MESOZOIC ERA
POSITIONING
PRODUCTION
RESERVOIR ROCK
SEDIMENTS
SOUTH AMERICA
TERTIARY PERIOD
THICKNESS
VENEZUELA
WELLS