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The leases were acquired at two OCS lease sales: OCS Lease Sale 72 in May 1983, at which Block 65 and Block 109 were leased and OCS Lease Sale 81 in April 1984, at which Block 64 was leased. Shell Offshore Inc. owns 100% of the leases.
 
The discovery well was drilled in October 1983 on Green Canyon Block 65. A total of four wells and four sidetrack wells were drilled within the three lease blocks.

Production

Initial production while drilling began in July 1989. First production through permanent facilities occurred in late 1991.


In January 1996, the Bullwinkle platform began processing oil and gas from Shell’s deepwater "Rocky" subsea completion located in Green Canyon Block 110, about four miles away in 1,785 feet of water.

Platform Expansion Project In February 1996, Shell embarked upon a project to increase the Bullwinkle platform’s production processing capacity to 200,000 barrels of oil per day and 306 million cubic feet of gas per day.
 
The expanded processing capacity was designed to accommodate the current Bullwinkle production of 14,000 barrels of oil per day and 22 million cubic feet of gas per day, the Rocky subsea production of 3,800 barrels of oil per day and 5.5 million cubic feet of gas per day, the BP/Amoco-operated Troika subsea production (Green Canyon 200, about 15 miles southeast of Bullwinkle) of 80,000 barrels of oil per day and 142 million cubic feet of gas per day, plus any further third party production for which contracts may be signed.
 
The facility expansion added about 4,000 tons of equipment and piping, utilizing more than 30,000 square feet. The new equipment consisted of production separators, inlet heaters, gas compressors, launcher receivers, control building, additional separators, hydraulic power units for subsea wells, bulk oil treater, flash gas compression, electrical generation equipment, a 20-ton crane, chemical storage and pumps for hydrate prevention, corrosion inhibition and paraffin dispersion, and additional pipeline pumps.
 
Major contractors used for the expansion
Waldemar S. Nelson & Co. Inc. engineering
Petro-Marine Engineering Inc. engineering
Petrotech Inc engineering
Bay Inc. fabrication
Houma Industries Inc. module fabrication 
Production Management Industries Inc. generator station fabrication
Seco Industries Inc. electrical fabrication
John H. Carter Co., Inc. instrumentation
Total Engineering Services Team Inc. instrumentation and electrical installation
Ingersoll-Dresser Pump Company pumps 
Solar Turbines Inc rotating equipment
Reily Electrical Supply Inc. electrical equipment
The expanded facility began receiving production from the Troika subsea project on November 10, 1997, and added Shell-operated Angus subsea production (Green Canyon Block 113, 12 miles away) in September 1999.
 
Two additional subsea fields, Manatee (Shell operated) and Aspen (BP operated) were connected to the Bullwinkle Platform for processing in 2002.