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

Accumulation Number: 51PETRELORIGINAL OPERATOR:Arco Australia LtdTYPE:GasSTATUS:Possible Future ProducerLOCATION:260 km west-southwest of DarwinSTATE:Western Australia and the Northern TerritoryORIGINAL TITLE(S):NT/P3BASIN:BonaparteSUB-BASIN:Petrel Sub-basinDISCOVERY WELL:Petrel-1Longitude (E): 128.4742Latitude (S): -12.8264Date total depth reached: 06 AUG 69Water Depth:98 mKelly bushing:34.4 mOperator:Arco Australia LtdTotal Depth:3,980 mKBNUMBER OF WELLS DRILLED: 7 (includes 1 relief well)STRUCTURE/TRAP:Elongate, northwest-southeast oriented anticline. Some ofthe gas pools may have a major stratigraphic componentdue to lateral changes in reservoir quality.AREAL CLOSURE:124 km 2 (at base Jurassic level)570 km 2 (at the top of the Lower Permian)VERTICAL CLOSURE:198 m (from the top of the Lower Permian)RESERVOIR UNITS:3 sands within the Cape Hay Member (‘Lower’, ‘Middle’and ‘Upper’ Sands)HYDROCARBON SATURATION: 66% (‘Upper’ Sand, Petrel-5)77% (‘Middle’ Sand, Petrel-5)BOTTOM HOLE TEMPERATURE: 137 o C (at 3,933 mKB, Petrel-5)PETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):POROSITY:PERMEABILITY:Cape Hay MemberGasHyland Bay FormationLate PermianSandstone, very fine to medium grained, occassionallycoarse grained, usually well sorted, clean, quartzose,subangular to rounded with patchily developed calcitecement and quartz overgrowths. Interbedded withsiltstones and shales.Shallow, tidally dominated, estuarine conditions3,974.6 m (Cape Hay Member)9-11% (average)Up to 1,500 mD (core analysis ‘Upper SandstoneZone’, Petrel-5)TEST DATA FROM THE DISCOVERY WELL (Petrel-1):Well not tested.