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

Accumulation Number: 49PENGANAORIGINAL OPERATOR:TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 125.02904Latitude (S): -11.8914Date total depth reached: 06 MAY 88Water Depth:117 mKelly bushing:26 mOperator:BHP Petroleum Pty LtdTotal Depth:2,095 mNUMBER OF WELLS DRILLED: 1STRUCTURE/TRAP:BHP Petroleum Pty LtdGasOther Discovery640 km west-northwest of DarwinTerritory of Ashmore and Cartier Islands Adjacent Area(Northern Territory)AC/L1BonaparteVulcan Sub-basinPengana-1East-northeast/west-southwest oriented fault block on theJabiru Horst.RESERVOIR UNITS: 1GROSS HYDROCARBON COLUMN: 5 m (1,639 – 1,644 mKB)GAS/WATER CONTACT:1,644 – 1,647 mKB (log derived)1,618 – 1,621 mTVDSS (log derived)GAS/CONDENSATE RATIO: 22.8 bbl/MMscf (DST-1)52.7 bbl/MMscf (DST-2)RESERVOIR PRESSURE:2,374.3 psia (at 1,642 mKB)RESERVOIR TEMPERATURE: 63 o CHYDROCARBON SATURATION: 50%BOTTOM HOLE TEMPERATURE: 83 o CPETROLEUM BEARING UNIT No.1: Sahul GroupCONTENTS:GasFORMATION:Sahul GroupAGE:TriassicLITHOLOGY:Sandstone. Several fining upwards cycles observed incore. Coarse to fine grained, occasionally gradingupwards to silt size, angular to subrounded, poorly sorted,quartzose, crossbedded, occasional bimodal grainsizedistribution, common pyrite and carbonaceous material,interbedded with minor siltstone, claystone and coals. Noevidence of reworking.DEPOSITIONAL ENVIRONMENT: Fluvial, meandering stream environment.FORMATION TOP (mKB):1,621 mPOROSITY:22.1% (average)PERMEABILITY:2 – 11,768 mD (RFT data)