COMPOSITIONAL DATA : GAS : GAS PROPERTIES Puffin Fm RFT ...

PERMEABILITY:PETROLEUM BEARING UNIT No.2:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):GROSS HYDROCARBON COLUMN:RESERVOIR PRESSURE:RESERVOIR TEMPERATURE:Up to 17 mD between 2,542-2,544 m (coreanalysis, Tern-4).Up to 47 mD between 2,567-2,570 m (coreanalysis, Tern-4)Cape Hay Member (Tern-4)GasHyland Bay FormationLate PermianSandstone, off white to pale grey/brown, fine to coarse,poorly to moderately well sorted, subangular tosubrounded, occassional to moderate amounts ofcalcareous and siliceous cement. Interbedded with darkgrey/black to brown carbonaceous siltstone with a trace ofpyrite.Shallow, tidal, estuarine environment2,619 mKB (Cape Hay Member, Tern-4)1.5 m (2,642-2,643.5 mKB, Tern-4)3,738 psig (2,643 mKB, Tern-4)100.6 o C (2,643 mKB, Tern-4)TEST DATA FROM THE DISCOVERY WELL (Tern-1):DST 2, 2,525.3-2,550.3 m,Flowed gas at 195,400 m 3 /day througha 15.8 mm choke.Hyland Bay Formation (Tern Member)TEST DATA FROM THE DISCOVERY WELL (Tern-4):DST, 2,542-2,545 m,Flowed gas at 152,100 m 3 /day.DST (CASED) 1, 2,542-2,573 m,Flowed gas at 141,000 m 3 /day, water at6.3 bbls/day and 50.5 o API condensateat 13 bbls/day.RFT 2, 2,643 m,Recovered 1.444 m 3 of gas and 12 litresof water.Hyland Bay Formation (Tern Member)Hyland Bay Formation (Tern Member)Hyland Bay Formation (Cape Hay Member)APPRAISAL AND DEVELOPMENT DRILLING :Tern-2 was drilled 9.8 km southeast of Tern-1 on the southern nose of the Tern anticline. A DST takenover the interval 2,545.5 – 2,569.5 mKB in the Tern Member flowed gas at 420,000 m 3 /day. Tern-2 wassuspended as a possible future gas producer.Tern-3, drilled 7 km south-southwest of Tern-2, unsuccessfully tested an adjacent but separateculmination to the south of the Tern field. The well was plugged and abandoned without encounteringsignificant hydrocarbons.Tern-4 was an appraisal well designed to delineate the Tern structure, prove-up reserves and to fullycore the Tern Member reservoir. Gas flows of up to 152,100 m 3 /day were recorded from the TernMember and gas was also recovered from the Cape Hay Member on RFT. The well was plugged andabandoned as it was not considered to be in an optimal position for any future field development.