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

Accumulation Number: 46MONTARAORIGINAL OPERATOR:`TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 124.5317Latitude (S): -12.6893Date total depth reached: 26 APR 88Water Depth:85.1 mKelly bushing:17.7 mOperator:BHP Petroleum Pty LtdTotal Depth:3,444 mKBNUMBER OF WELLS DRILLED: 2STRUCTURE/TRAP:BHP Petroleum Pty LtdOil and GasPossible Future Producer670 km west of DarwinTerritory of Ashmore and Cartier Islands Adjacent Area(Northern Territory)AC/P7BonaparteVulcan Sub-basinMontara-1Fault dependent closure on northeast-southwest trendinghorst block.RESERVOIR UNITS: 1GAS/OIL CONTACT:2,606 mSS (Montara-1)OIL/WATER CONTACT:2,621.5 mSS (Montara-2)NET GAS PAY:24.8 m (2,599-2,624 mKB, Montara-1)NET OIL PAY:9.4 m (2,624-2,633 mKB, Montara-1)WATER SATURATION (S w ):40% (average, 2,599-2,624 mKB, Montara-1)GAS/OIL RATIO:3,613 scf/stb (DST-2)OIL GRAVITY:34.6 o APISOLUTION GAS/OIL RATIO: 739 scf/bbl (at 107 o C)OIL VOLUME FACTOR:1.417 bbl/std bblRESERVOIR PRESSURE:3,777 psigRESERVOIR TEMPERATURE: 107 o CBOTTOM HOLE TEMPERATURE: 119 o CPETROLEUM BEARING UNIT No.1: Flamingo GroupCONTENTS:Oil and GasFORMATION:Montara FormationAGE:Late Jurassic (Oxfordian)LITHOLOGY:Sandstone, generally massive, becoming graded andcross-bedded with depth with individual laminae finingupwards. Generally medium to coarse grained,subrounded to subangular, well sorted, quartzose, minorkaolin with traces of carbonate cement and with minordevelopment of secondary porosity by dissolution offeldspars.DEPOSITIONAL ENVIRONMENT: Upper shoreface barrier bar.FORMATION TOP (mKB):2,388 mPOROSITY: 19.6 - 24.5% (core data, 2,604-2,610.5 m)PERMEABILITY: 759 – 5,967 mD (core data, 2,604-2,610.5 m)(around 4,000 mD average)