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

Accumulation Number: 59SWANORIGINAL OPERATOR:TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 124.4928Latitude (S): -12.1882Date total depth reached: 30 JAN 73Water Depth:Kelly bushing:Operator:Total Depth:NUMBER OF WELLS DRILLED:STRUCTURE/TRAP:AREAL CLOSURE: 6 km 2VERTICAL CLOSURE:270 mRESERVOIR UNITS:NET PAY:NET TO GROSS RATIO:HYDROCARBON SATURATION:BOTTOM HOLE TEMPERATURE:Arco Australia LtdGasOther Discovery700 km west of DarwinTerritory of Ashmore and Cartier Islands Adjacent Area(Northern Territory)NT/P2BonaparteVulcan Sub-basinSwan-1109 m34 mArco Australia Ltd3,284 mKB4 (including 1 sidetrack)Northeast-southwest trending horst block with updipclosure dependent on fault seal against a salt diapir.Several, thin gas bearing sands identified on logs in theLate Cretaceous section (informally named the P1, P2, P3and P4 reservoir sands).11.25 m (Swan-1, P1 and P2 sands)22.1 m (Swan-2, P1, P2 and P3 sands)19.4 m (Swan-3, P1 and P2 sands)32.7 m (Swan-3/ST1, P1, P2 and P3 sands)75% (Swan-3, 2,306-2,332 mKB, P1 and P2 sands)55% (Swan-3/ST1, 2,342-2,375 mKB, P1 and P2 sands)93% (Swan-3/ST1, 2,445-2,461 mKB, P3 sand).57% (Swan-1, P1 and P2 sands)82% (Swan-2, P1, P2 and P3 sands)32% (Swan-3, P1 and P2 sands)75% (Swan-3/ST1, P1, P2 and P3 sands)100 o CPETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):POROSITY:Bathurst Island GroupGasPuffin FormationLate CretaceousSandstone, clean, fine to medium grained, subangular,well sorted, excellent visual porosity. Fluid escapestructures, dish structures, flame structures and waterescape pipes are observed in cores.Stacked, submarine fan sandstone sequence.2,152.8 m (Bathurst Island Group)18.9% (average log porosity, Swan-1, P1 and P2 sands)23% (average log porosity, Swan-3, P1 and P2 sands)20% (average log porosity, Swan-3/ST1, P1, P2 and P3sands).