The Penal - Barrackpore Field

Field name Penal/Barrackpore field
Ultimate recoverable reserves 1279 MMBO; 62&8 BCFG
Field location:
Country Trinidad
Basin/Province Southern basin, Trinidad
Field discovery:
Year first pay discovered Oligocene Cipero Formation, Herrera sandstone member 1938
Year second pay discovered Herrera sandstone (deeper; "intermediate lens') 1946
Year third pay discovered Herrera sandstone, deep 1949

Discovery well name and general location:
First pay Penal No.23; Central Penal lease
Second pay Penal No.92; southwest Penal area
Third pay Barrackpore No.336; West Barrackpore
Discovery well operator United British Oufields of Trinidad
Second pay United British Oufields of Trinidad
Third pay Trinidad Leaseholds Limited

IP:
First pay 500 BOPD
Second pay 600 BOPD
Third pay 790 BOPD

All other zones with shows of oil and gas in the field:
Age Formation Type of Show
Pliocene Forest/Wilson Oil
Geologic concept leading to discovery and method or methods used to delineate prospect
Wilson Forest Sandstone: surface geology, oil seeps; delineation: subsurface geology; discovery: nontechnical; delineation: subsurface geology, oil seeps, seismic surveys

Structure:
Province/basin type Foreland basin (modified marginal sag basin); Bally 42, Klemme III Bb
Tectonic history
The Penal/Barrackpore anticline formed as a result ofmiddle Miocene compression that occurred in response to the oblique collision of the Caribbean and South American plates. A transpressional episode occurred occurred during the late Pliocene causing rejuvenation of faults and additional folding.
Regional structure
One of a series of east-northeast- west-south west-trending en echelon anticlinal structures found in the Southern basin of onshore Trinidad.
Local structure

Southwest-plunging Penal/Barrackpore anticline with a regional tilt of approximately 11⁰ toward the south west.

Trap:
Trap type(s) Thrust-faulted anticlinal trap with multiple pays; numerous stratigraphic traps

EXPLOITATION OF MIDDLE MIOCENE OIL BEARING INTERMEDIATE HERRERA SANDSTONE RESERVOIRS IN TRINIDAD, WEST INDIES. Fazal Hosein, Trinidad and Tobago Oil Company Ltd. Pointe-a-Pierre, Trinidad

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