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

Accumulation Number: 23ELANGORIGINAL OPERATOR:BHP Petroleum (ZOCA 91-12) Pty LtdTYPE:OilSTATUS:ProducerLOCATION:500 km west-northwest of DarwinSTATE:Zone of Cooperation, Part AORIGINAL TITLE(S): ZOCA 91-12BASIN:BonaparteSUB-BASIN:Flamingo High, Sahul PlatformDISCOVERY WELL:Elang-1Longitude (E): 126.6004Latitude (S): -10.8843Date total depth reached: 10 FEB 94Water Depth:82 mKelly bushing:22 mOperator:BHP Petroleum (ZOCA 91-12) Pty LtdTotal Depth:3,192 mKBNUMBER OF WELLS DRILLED: 4 (including Elang West-1)STRUCTURE/TRAP:Elongate, east-west oriented, faulted four-way-dip closureon the Elang Trend.AREAL CLOSURE: 16 km 2VERTICAL CLOSURE:120 mRESERVOIR UNITS: 1GROSS HYDROCARBON COLUMN: 76.5 m (3,006 – 3,083 mRT)HYDROCARBON SATURATION: 64% (average)NET TO GROSS RATIO: 38%GAS/OIL RATIO:216 scf/stbOIL/WATER CONTACT:3,083 mRT (3061 mSS)OIL GRAVITY:59.5 o APIPETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP:POROSITY:PERMEABILITY:Flamingo GroupOilElang FormationMiddle to Late Jurassic (Late Callovian to EarlyOxfordian)Sandstone, very fine to very coarse grained, moderatelywell sorted, mineralogically mature with occasional thinclay stringers and laminae. Common authigenic quartzand kaolin with traces of pyrite, carbonate and glauconite.Five sandstone bodies between 3,006.5 mKB and 3,083mKB, separated by interbedded claystones have beenidentified on logs.A nearshore to shelfal marine facies which transgressedthe underlying fluvio-deltaic sediments of the PloverFormation.3,006.5 mRT11% (average)Up to 524 mD (core analysis)TEST DATA FROM THE DISCOVERY WELL (Elang-1):MDT, 1 gallon chamber, 3,010 m,Recovered 130 cc of oil with mud filtrate.Elang Formation