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

Accumulation Number: 12BULLERORIGINAL OPERATOR:BHP Petroleum (Northwest Shelf) Pty LtdTYPE:OilSTATUS:Other DiscoveryLOCATION:530 km west-northwest of DarwinSTATE:Western AustraliaORIGINAL TITLE(S):WA-260-PBASIN:BonaparteSUB-BASIN:Flamingo HighDISCOVERY WELL:Buller-1Longitude (E): 126.2403Latitude (S): -10.9077Date total depth reached: 13 DEC 96Water Depth:109 mKelly bushing:25 mOperator:BHP Petroleum (Northwest Shelf) Pty LtdTotal Depth:3,609 mKBNUMBER OF WELLS DRILLED: 1STRUCTURE/TRAP:Tilted fault block.AREAL CLOSURE: 1 km 2VERTICAL CLOSURE:180 mOIL GRAVITY:52 o APIGAS/OIL RATIO:114 scf/stbPETROLEUM BEARING UNIT No.1: Troughton GroupCONTENTS:OilFORMATION:Elang FormationFORMATION TOP:3,421.5 mTVDSSAGE:CallovianLITHOLOGY:Stacked sandstone sequence, interbedded with siltyclaystones and claystones. Sandstone: light greyish brown,very light grey to mid grey, light olive grey, rare brownishblack, very fine to fine, medium to coarse grained,predominantly medium, poor to moderately well sorted,unconsolidated in part but mainly friable to firm. Commonto abundant weak quartz overgrowths with traces ofcarbonate cement and argillaceous matrix.DEPOSITIONAL ENVIRONMENT: Transgressive delta, comprising stacked distributorychannels and upper shoreface sands.GROSS HYDROCARBON COLUMN: 26.5 m (3,446.5 – 3,473 mRT)NET PAY:8.56 mNET TO GROSS RATIO: 32.3%HYDROCARBON SATURATION: 83.4%OIL/WATER CONTACT:3,448 mTVDSS (free water level)POROSITY:11.9% (core data)10.7% (average log)PERMEABILITY:369.7 mD (average from core)TEST DATA FROM THE DISCOVERY WELL (Buller-1):MDT 1, 3,440.7 mTVDSS,Recovered 16 litres of 52 o API oiland 0.15 m 3 of gas.Elang Formation