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

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Accumulation Number: 11BUFFALOORIGINAL OPERATOR:BHP Petroleum (Northwest Shelf) Pty LtdTYPE:OilSTATUS:ProducerLOCATION:550 km west-northwest of DarwinSTATE:Western AustraliaORIGINAL TITLE(S):WA-260-PBASIN:BonaparteSUB-BASIN:Laminaria High, Sahul PlatformDISCOVERY WELL:Buffalo-1Longitude (E): 126.0974Latitude (S): -10.6728Date total depth reached: 27 SEP 96Water Depth:27.3 mKelly bushing:28.3 mOperator:BHP Petroleum (Northwest Shelf) Pty LtdTotal Depth:3,473 mKBNUMBER OF WELLS DRILLED: 2STRUCTURE/TRAP:Faulted horst block with some internal four-way-dipclosure.RESERVOIR UNITS: 1OIL GRAVITY:53 o API<strong>GAS</strong> TO OIL RATIO:126 scf/stbPETROLEUM BEARING UNIT No.1: Elang FormationCONTENTS:OilFORMATION:Elang FormationAGE:Middle Jurassic (Callovian)LITHOLOGY:Stacked sandstones, interbedded with minor argillaceoussiltstones, silty claystones and claystone. Sandstone: verylight grey to yellowish grey to light olive grey, very fine tofine, medium to carse grained, well sorted, commonlyunconsolidated, friable with minor pyritic matrix and weaksiliceous cement.DEPOSITIONAL ENVIRONMENT:: Stacked distributary channels deposited in an estuarineenvironment superposed upon a sequence of stacked mouthand transverse bars.GROSS HYDROCARBON COLUMN: 45.1 m (3,301 – 3,346.1 mRT)NET PAY:32 mNET TO GROSS RATIO: 72%HYDROCARBON SATURATION: 77%OIL/WATER CONTACT:3,323.4 mTVDSS (free water level from MDT data)POROSITY:12% (average log porosity)PERMEABILITY:378 mD (average from core)TEST <strong>DATA</strong> FROM THE DISCOVERY WELL (Buffalo-1):DST (CASED) 1, 3,307-3,335 m,Flowed 53 o API oil at 11,800 bbls/dayand gas at 328,500 m 3 /day through a20.6 mm choke.Elang Formation
APPRAISAL AND DEVELOPMENT DRILLING:Buffalo-2 was drilled in April 1997 and was suspended as future oil producer after encounteringhydrocarbons in the Elang Formation.RESERVES :Oil :25 MMbblsSource: Department of Resources Development, Western Australia, 1998.REMARKS:Commercial production of oil from Buffalo commenced in December 1999. Two production wells areconnected to to an unmanned wellhead platform which is linked to a permanently moored FPSO (theBuffalo Venture).The Buffalo oil discovery lies in Production Licenses WA-19-L and WA-21-L.
Page 1 and 2: COMPOSITIONAL DATA :GAS :GASPROPERT
Page 4 and 5: Accumulation Number: 10BONAPARTEORI
Page 8 and 9: Accumulation Number: 12BULLERORIGIN
Page 10 and 11: REMARKS:Fluorescence recorded below
Page 12 and 13: 124°58'125°00'125°02'Challis 11C
Page 14 and 15: Accumulation Number: 14CHALLISORIGI
Page 16 and 17: RFT 4, 1,392 m,Recovered 6.5 litres
Page 18 and 19: Accumulation Number: 15CHUDITCHORIG
Page 20 and 21: Accumulation Number: 16CORALLINAORI
Page 22 and 23: Accumulation Number: 17CRUXORIGINAL
Page 24 and 25: Accumulation Number: 18CURLEWORIGIN
Page 26 and 27: TEST DATA FROM THE DISCOVERY WELL (
Page 28 and 29: 125°18'1060125°20'10701070107011
Page 30 and 31: Accumulation Number: 20EAST SWANORI
Page 32 and 33: GAS SATURATION:33% (average, 2,695
Page 34 and 35: 124°34' 124°36' 124°38'280012°1
Page 37 and 38: 1250125°45'125°50'0 5 km11°15'Co
Page 39 and 40: Accumulation Number: 23ELANGORIGINA
Page 41 and 42: 126°32'126°34' 126°36' 126°38'1
Page 43 and 44: Accumulation Number: 24EVANS SHOALO
Page 45 and 46: RFT 13, 3,678 m,Plover FormationRec
Page 47 and 48: 1800127°30'2000127°40'19002000210
Page 49 and 50: COMPOSITIONAL DATA :GAS :GASPROPERT
Page 51 and 52: 126°30'126°40'1050105010°50'1000
Page 53 and 54: STRATIGRAPHY (Flamingo-1) :AGE UNIT
Page 55 and 56: 600129°15'129°30'129°45'11°45'N
Page 57 and 58:
Accumulation Number: 28FOHNORIGINAL
Page 59 and 60:
Accumulation Number: 29GARIMALAORIG
Page 61 and 62:
Accumulation Number: 30HALCYONORIGI
Page 63 and 64:
STRATIGRAPHY (Halcyon-1) :AGE UNIT
Page 65 and 66:
124°58'125°00'Jabiru 1211°55'Jab
Page 67 and 68:
Jabiru-4 intersected a 32.5 m gross
Page 69 and 70:
STRATIGRAPHY (Jabiru-12) :AGE UNIT
Page 71 and 72:
REMARKS:Jahal-1 was drilled to 3,30
Page 73 and 74:
126°28'126°30'320010°50'3200Kaka
Page 75 and 76:
Accumulation Number: 34KAKATUA NORT
Page 77 and 78:
REMARKS:Kakatua North-1 was abandon
Page 79 and 80:
1700129°00'1800129°05'1790129°10
Page 81 and 82:
Accumulation Number: 36KELP DEEPORI
Page 83 and 84:
STRATIGRAPHY (Krill-1) :AGE UNIT FO
Page 85 and 86:
Accumulation Number: 40LESUEURORIGI
Page 87 and 88:
TEST DATA FROM THE DISCOVERY WELL (
Page 89 and 90:
Accumulation Number: 39LAMINARIAORI
Page 91 and 92:
Page 93 and 94:
Accumulation Number: 41LEEUWINORIGI
Page 95 and 96:
STRATIGRAPHY (Leeuwin-1) :AGE UNIT
Page 97 and 98:
1400125°35'125°40'145014201450140
Page 99 and 100:
Accumulation Number: 43LOXTON SHOAL
Page 101 and 102:
RESERVES:Gas:Condensate:9.56 TCF (i
Page 103 and 104:
RFT 8, 3,724.9 m,Recovered 0.03 m 3
Page 105 and 106:
Accumulation Number: 45MARETORIGINA
Page 107 and 108:
REMARKS:A 3.5 m gross hydrocarbon c
Page 109 and 110:
124°31'124°33'12°40'275027002700
Page 111 and 112:
STRATIGRAPHY (Montara-1) :AGE UNIT
Page 113 and 114:
125°00'125°05'350032500 5 kmConto
Page 115 and 116:
STRATIGRAPHY (Oliver-1) :AGE UNIT F
Page 117 and 118:
MDT, Run 1, 2,600.5 mRecovered 21 l
Page 119 and 120:
125°02'00.5 km1650Contour Interval
Page 121 and 122:
Accumulation Number: 50PENGUINORIGI
Page 123 and 124:
RFT 5, 2,535 m,Recovered 3.6 m 3 of
Page 125 and 126:
128°20'WANT128°30'425012°40'0 10
Page 127 and 128:
COMPOSITIONAL DATA :GAS :GASPROPERT
Page 129 and 130:
Accumulation Number: 53PUFFINORIGIN
Page 131 and 132:
APPRAISAL AND DEVELOPMENT DRILLING
Page 133 and 134:
Accumulation Number: 54RAMBLERORIGI
Page 135 and 136:
Page 137 and 138:
STRATIGRAPHY (Saratoga-1) :AGE UNIT
Page 139 and 140:
124°24'124°25'124°26'124°27'GOC
Page 141 and 142:
RESERVES:Initial Oil:20.5 MMbblsSou
Page 143 and 144:
17501750127°45' 128°00' 128°15'1
Page 145 and 146:
Accumulation Number: 58SUNSETORIGIN
Page 147 and 148:
Page 149 and 150:
Accumulation Number: 59SWANORIGINAL
Page 151 and 152:
Page 153 and 154:
Accumulation Number: 60TAHBILKORIGI
Page 155 and 156:
NET PAY:60.7 mNET TO GROSS RATIO: 8
Page 157 and 158:
16001600124°52'124°52'124°54'165
Page 159 and 160:
COMPOSITIONAL DATA CONTD :GAS :GASP
Page 161 and 162:
Page 163 and 164:
Accumulation Number: 63TERNORIGINAL
Page 165 and 166:
PERMEABILITY:PETROLEUM BEARING UNIT
Page 167 and 168:
Accumulation Number: 64TROUBADOUROR
Page 169 and 170:
FIT 3, 2,286 m,Recovered 0.45 m 3 o
Page 171 and 172:
Accumulation Number: 65TURTLEORIGIN
Page 173 and 174:
PETROLEUM BEARING UNIT No.2:CONTENT
Page 175 and 176:
RFT 4, 1,624.6 m,Recovered 1-2 cc o
Page 177 and 178:
Accumulation Number: 66VIENTAORIGIN
Page 179 and 180:
Page 181 and 182:
PETROLEUM BEARING UNIT No.2: Langfi
Page 184 and 185:
123° 124° 125° 126° 127° 128°
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COMPOSITIONAL DATA : GAS : GAS PROPERTIES Puffin Fm RFT ...

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