Sacha oil field of Ecuadorian Oriente

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6622378

Canfield, R W ^[1]; Bonilla, G; Robbins, R K

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1. Texaco Petroleum Co., Quito, Ecuador

The Sacha oil field in the Ecuadorian Oriente was discovered in early 1969. Production began in July 1972, and at the end of 1980 had exceeded 190 million bbl. Drilling through 1980 had resulted in 91 oil wells and 2 dry holes. Estimated original primary recoverable reserves surpass 632 million bbl. The field is on a very low-relief anticline about 17.5 mi (28 km) long and averaging 4 mi (6.5 km) wide. Vertical closure amounts to 200 ft (60 m) and there are 41,000 acres (16,600 ha.) of areal closure on top of the principal reservoir. The Cretaceous sandstones, at drilled depths between 9,300 and 10,100 ft (2,835 and 3,080 m) provide excellent reservoirs. The Hollin Formation, the basal Cretaceous sandstone, is the principal reservoir, having produced 80% of the oil through 1980 and containing about 68% of the original reserves.

• OSTI ID: 6622378
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 66:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ECUADOR
OIL FIELDS
RESERVOIR ROCK
ANTICLINES
CRETACEOUS PERIOD
OIL WELLS
PRODUCTION
SANDSTONES
DEVELOPING COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
LATIN AMERICA
MESOZOIC ERA
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SOUTH AMERICA
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration