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

Accumulation Number: 14CHALLISORIGINAL OPERATOR:TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 125.0045Latitude (S): -12.1238Date total depth reached: 23 OCT 84Water Depth:Kelly bushing:Operator:Total Depth:NUMBER OF WELLS DRILLED:STRUCTURE/TRAP:AREAL CLOSURE: 7 km 2VERTICAL CLOSURE:55 mRESERVOIR UNITS:Multiple reservoir sandsGROSS HYDROCARBON COLUMN: 29 mNET TO GROSS RATIO: 72%GAS/OIL RATIO:326 scf/stbOIL/WATER CONTACT:1,410.5 mSSOIL GRAVITY:40 o APIDRIVE:Water DriveBHP Petroleum Pty LtdOilProducer650 km west of DarwinTerritory of Ashmore and Cartier Islands Adjacent Area(Northern Territory)NT/P26BonaparteVulcan Sub-basinChallis-1106.2 m8 mBHP Petroleum Pty Ltd1,960 mKB14 wells plus 2 sidetracksFault dependent closure on the Cleghorn Horst, separatedby a saddle from the Cassini accumulation to thesouthwest.PETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):POROSITY:PERMEABILITY:Sahul GroupOilChallis FormationMiddle to Late TriassicVery fine to fine grained, moderately well to well sorted,subround to angular quartz grains with abundantpotassium feldspar and minor lithic fragments,carbonates, micas and clays.Channel sand system which transgressed estuarine andlagoonal sediments forming laterally extensive sheetsands interbedded with claystones, siltstones and minorcarbonates.1,387 mUp to 36% (29% average)Up to 6,500 mD (1,320 mD average)TEST DATA FROM THE DISCOVERY WELL (Challis-1):Production Test, 1,390.5-1,403.5 m, Challis FormationFlowed 40 o API oil at 6,730 bbls/day.