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

Accumulation Number: 60TAHBILKORIGINAL OPERATOR:TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 124.5040Latitude (S): -12.7328Date total depth reached: 01 DEC 90BHP Petroleum Pty LtdGasPossible Future Producer700 km west of DarwinTerritory of the Ashmore and Cartier Islands AdjacentArea (Northern Territory)AC/P7BonaparteVulcan Sub-basinTahbilk-1Water Depth:89 mKelly bushing:26 mOperator:BHP Petroleum Pty LtdTotal Depth:3,226 mKBNUMBER OF WELLS DRILLED: 1STRUCTURE/TRAP:Northeast-southwest trending tilted fault blockAREAL CLOSURE:4.1 km 2 (at Intra-Oxfordian level)23 km 2 of drape closure at Top Cretaceous levelVERTICAL CLOSURE:130 mRESERVOIR UNITS: 2BOTTOM HOLE TEMPERATURE: 114 o C (at 3,223 m)PETROLEUM BEARING UNIT No.1: Bathurst Island GroupCONTENTS:GasFORMATION:Gibson FormationAGE:SantonianLITHOLOGY:Sandstone, fine grained, glauconitic, subangular tosubrounded, well sorted and well cemented withcalcareous cement. Coarsening upwards profile.DEPOSITIONAL ENVIRONMENT: Distal turbidite sands.FORMATION TOP (mKB):2,260 mGROSS HYDROCARBON COLUMN: 34 m (2,273-2,307 mKB)NET PAY:32.3 mNET TO GROSS RATIO: 95%HYDROCARBON SATURATION: 69%CONDENSATE TO GAS RATIO: 40 bbls/MMscfPOROSITY:21% (average log porosity)PERMEABILITY:100-400 mDPETROLEUM BEARING UNIT No.2:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):GROSS HYDROCARBON COLUMN:Flamingo GroupGas (2 separate sands)Montara FormationLate Callovian to OxfordianSandstone, clear, medium grained, moderately wellsorted, subangular to subround interbedded withbioturbated, lower shoreface siltstones and shales.Northeast-southwest oriented barrier bar/strandlinedeposits.2,624 m69.6 m