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

Accumulation Number: 15CHUDITCHORIGINAL OPERATOR:Shell Development (PSC 9) Pty LtdTYPE:GasSTATUS:Other DiscoveryLOCATION:380 km northwest of DarwinSTATE:Zone of Cooperation, Part AORIGINAL TITLE(S): ZOCA 91-09BASIN:BonaparteSUB-BASIN:Sahul PlatformDISCOVERY WELL:Chuditch-1Longitude (E): 128.0985Latitude (S): -10.5616Date total depth reached: 1 NOV 98Water Depth:64 mKelly bushing:25 mOperator:Shell Development (PSC 9) Pty LtdTotal Depth:3,035 mRTNUMBER OF WELLS DRILLED: 1VERTICAL CLOSURE:26 m (at Top Plover Formation)NET PAY:19.6 mNET TO GROSS RATIO: 78%GAS/CONDENSATE RATIO: 0.7 bbls/MMscfPETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mTVDSS):POROSITY:Troughton GroupGasPlover FormationMiddle Jurassic (Bathonian to Bajocian)Sandstone with minor interbedded claystone and a traceof coal. Sandstone: light brownish grey to dark olive grey,clear to translucent, rare grayish yellow, very hard,massive, fine to medium grained, sub-angular, rare subrounded,sub-spherical, very well to moderately sortedwith minor to common quartz overgrowths, common toabundant siliceous cement, rare lithics, trace of nodularpyrite, poor to fair intergranular porosity.Deltaic to shallow marine.2,894 mTVDSS6% to 18% (12.5% average), (core data).TEST DATA FROM THE DISCOVERY WELL (Chuditch-1):MDT 1, Run 3, 2,934 mRecovered 6.9 m 3 of gas, 1.2 litres ofmud filtrate from the 6 gallon chamber.Recovered 54 litres of gas from the 1gallon chamber.MDT 2, Run 3, 3,004 mRecovered 6.1 litres of oily mud filtrateand mud and 2.5 litres of water fromthe 2.75 gallon chamber.Plover FormationPlover Formation