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

Accumulation Number: 41LEEUWINORIGINAL OPERATOR:TYPE:STATUS:LOCATION:STATE:ORIGINAL TITLE(S):BASIN:SUB-BASIN:DISCOVERY WELL:Longitude (E): 124.5851Latitude (S): -12.7112Date total depth reached: 02 DEC 91BHP Petroleum Pty LtdGasOther Discovery680 km west of DarwinTerritory of Ashmore and Cartier Islands Adjacent Area(Northern Territory)AC/P7BonaparteVulcan Sub-basinLeeuwin-1Water Depth:85 mKelly bushing:26 mOperator:BHP Petroleum Pty LtdTotal Depth:3,376 mKBNUMBER OF WELLS DRILLED: 1STRUCTURE/TRAP:Fault dependent closure on the eastern flank of the‘Greater Montara’ Horst BlockAREAL CLOSURE:6.5 km2VERTICAL CLOSURE:75 m (at the intra-Oxfordian unconformity)RESERVOIR UNITS: 1RESERVOIR PRESSURE:3,568.6 psiaRESERVOIR TEMPERATURE: 95 o CBOTTOM HOLE TEMPERATURE: 116 o C (22.6 hours post circulation)PETROLEUM BEARING UNIT No.1:CONTENTS:FORMATION:AGE:LITHOLOGY:DEPOSITIONAL ENVIRONMENT:FORMATION TOP (mKB):POROSITY:PERMEABILITY:Flamingo GroupGasUpper Vulcan FormationUpper JurassicSandstone, glaucontic and argillaceous, off white to lightgreen to green-grey, fine to medium grained, wellsorted,angular to subrounded with up to 50% whiteargillaceous matrix with common, very fine to fine,glauconite pellets.Distal portion of a prograding submarine fan.2,460 m18% average (from logs)160-570 mDTEST DATA FROM THE DISCOVERY WELL (Leeuwin-1):RFT, 2,476 m,Recovered 0.003 m 3 of gas and 21.5 litresof filtrate and formation water.Upper Vulcan FormationREMARKS:Gas recovered at Leeuwin may be solution gas and an indication of a hydrocarbon accumulation updipof Leeuwin-1.