SCHLUMBERGER Survey report Client...................: SANTOS - INPEX - UNOCAL Field....................: Amrit Well.....................: Amrit-1 Spud date................: 20-Nov-2004 API number...............: Last survey date.........: 07-Dec-04 Engineer.................: D.Borges, L.Watson, O.Radicevic Total accepted surveys...: 44 MD of first survey.......: 0.00 m RIG:.....................: Jack Bates MD of last survey........: 2979.00 m STATE:...................: Victoria ----- Survey calculation methods------------- ----- Geomagnetic data ---------------------- Method for positions.....: Minimum curvature Magnetic model...........: BGGM version 2004 Method for DLS...........: Mason & Taylor Magnetic date............: 20-Nov-2004 Magnetic field strength..: 1221.99 HCNT ----- Depth reference ----------------------- Magnetic dec (+E/W-).....: 10.48 degrees Permanent datum..........: MSL Magnetic dip.............: -70.25 degrees Depth reference..........: Driller's Pipe Tally GL above permanent.......: -1396.00 m ----- MWD survey Reference Criteria --------- KB above permanent.......: Top Drive Reference G..............: 1000.09 mGal DF above permanent.......: 29.00 m Reference H..............: 1221.99 HCNT Reference Dip............: -70.25 degrees ----- Vertical section origin---------------- Tolerance of G...........: (+/-) 2.50 mGal Latitude (+N/S-).........: 0.00 m Tolerance of H...........: (+/-) 6.00 HCNT Departure (+E/W-)........: 0.00 m Tolerance of Dip.........: (+/-) 0.45 degrees ----- Platform reference point--------------- ----- Corrections --------------------------- Latitude (+N/S-).........: 0.00 m Magnetic dec (+E/W-).....: 10.48 degrees Departure (+E/W-)........: 0.00 m Grid convergence (+E/W-).: -0.46 degrees Total az corr (+E/W-)....: 10.94 degrees Azimuth from Vsect Origin to target: 0.00 degrees (Total az corr = magnetic dec - grid conv) Survey Correction Type ...: I=Sag Corrected Inclination M=Schlumberger Magnetic Correction S=Shell Magnetic Correction F=Failed Axis Correction R=Magnetic Resonance Tool Correction D=Dmag Magnetic Correction [(c)2004 IDEAL ID9_1C_01] SCHLUMBERGER Survey Report === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - (m) (deg) (deg) (m) (m) (m) (m) (m) (m) (deg) 10m) type (deg) === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 TIP None 2 1425.49 0.59 234.33 1425.49 1425.46 -4.28 -4.28 -5.96 7.34 234.33 0.00 MWD None 3 1454.01 1.07 295.89 28.52 1453.98 -4.25 -4.25 -6.32 7.62 236.09 0.33 MWD None 4 1487.29 0.97 129.33 33.28 1487.26 -4.29 -4.29 -6.38 7.69 236.08 0.61 MWD None 5 1510.95 0.86 56.64 23.66 1510.92 -4.32 -4.32 -6.08 7.46 234.60 0.46 MWD None 6 1539.34 0.80 303.78 28.39 1539.31 -4.09 -4.09 -6.07 7.32 235.99 0.49 MWD None 7 1568.02 0.85 315.97 28.68 1567.98 -3.83 -3.83 -6.38 7.44 239.03 0.06 MWD None 8 1595.59 0.53 308.57 27.57 1595.55 -3.60 -3.60 -6.62 7.54 241.45 0.12 MWD None 9 1624.12 0.56 304.38 28.53 1624.08 -3.44 -3.44 -6.84 7.66 243.29 0.02 MWD None 10 1653.18 0.34 298.89 29.06 1653.14 -3.32 -3.32 -7.03 7.78 244.73 0.08 MWD None 11 1681.34 0.26 305.03 28.16 1681.30 -3.24 -3.24 -7.16 7.86 245.63 0.03 MWD None 12 1709.52 0.31 319.56 28.18 1709.48 -3.15 -3.15 -7.26 7.91 246.56 0.03 MWD None 13 1737.89 0.40 311.67 28.37 1737.85 -3.02 -3.02 -7.38 7.98 247.73 0.04 MWD None 14 1766.33 0.35 299.78 28.44 1766.29 -2.92 -2.92 -7.53 8.08 248.85 0.03 MWD None 15 1809.32 0.26 261.27 42.99 1809.28 -2.86 -2.86 -7.74 8.26 249.70 0.05 MWD None 16 1849.73 0.23 231.00 40.41 1849.69 -2.93 -2.93 -7.90 8.42 249.65 0.03 MWD None 17 1878.02 0.37 193.70 28.29 1877.98 -3.05 -3.05 -7.96 8.53 249.02 0.08 MWD None 18 1908.10 0.34 223.98 30.08 1908.06 -3.21 -3.21 -8.05 8.67 248.24 0.06 MWD None 19 1935.76 0.18 265.57 27.66 1935.72 -3.28 -3.28 -8.15 8.78 248.11 0.09 MWD None 20 1963.97 0.17 252.91 28.21 1963.92 -3.29 -3.29 -8.23 8.87 248.21 0.01 MWD None 21 1991.95 0.12 204.40 27.98 1991.90 -3.33 -3.33 -8.29 8.93 248.11 0.05 MWD None 22 2020.87 0.20 231.00 28.92 2020.82 -3.39 -3.39 -8.34 9.00 247.88 0.04 MWD None 23 2049.42 0.23 223.20 28.55 2049.37 -3.46 -3.46 -8.41 9.10 247.64 0.01 MWD None 24 2077.78 0.26 214.74 28.36 2077.73 -3.56 -3.56 -8.49 9.21 247.27 0.02 MWD None 25 2105.32 0.33 183.75 27.54 2105.27 -3.69 -3.69 -8.53 9.29 246.63 0.06 MWD None 26 2134.71 0.29 176.46 29.39 2134.66 -3.85 -3.85 -8.53 9.36 245.74 0.02 MWD None 27 2162.92 0.22 203.34 28.21 2162.87 -3.97 -3.97 -8.55 9.42 245.11 0.05 MWD None 28 2192.60 0.14 180.37 29.68 2192.55 -4.06 -4.06 -8.57 9.48 244.68 0.04 MWD None 29 2220.68 0.29 203.20 28.08 2220.63 -4.15 -4.15 -8.60 9.55 244.21 0.06 MWD None 30 2248.46 0.15 220.05 27.78 2248.41 -4.25 -4.25 -8.65 9.64 243.85 0.05 MWD None 31 2277.42 0.31 183.89 28.96 2277.37 -4.35 -4.35 -8.68 9.71 243.36 0.07 MWD None 32 2306.21 0.34 216.07 28.79 2306.16 -4.50 -4.50 -8.74 9.83 242.74 0.06 MWD None 33 2334.13 0.40 185.07 27.92 2334.08 -4.67 -4.67 -8.79 9.95 242.05 0.07 MWD None 34 2361.66 0.37 221.08 27.53 2361.61 -4.83 -4.83 -8.86 10.09 241.42 0.09 MWD None 35 2390.55 0.33 232.85 28.89 2390.50 -4.95 -4.95 -8.99 10.26 241.17 0.03 MWD None 36 2419.57 0.32 200.20 29.02 2419.52 -5.08 -5.08 -9.08 10.40 240.81 0.06 MWD None 37 2433.15 0.24 208.59 13.58 2433.10 -5.14 -5.14 -9.11 10.46 240.59 0.07 MWD None 38 2476.28 0.50 232.35 43.13 2476.23 -5.33 -5.33 -9.30 10.72 240.19 0.07 MWD None 39 2534.29 0.33 216.60 58.01 2534.24 -5.62 -5.62 -9.60 11.13 239.67 0.04 MWD None 40 2649.13 0.37 195.11 114.84 2649.07 -6.24 -6.24 -9.90 11.70 237.76 0.01 MWD None 41 2762.85 0.23 199.79 113.72 2762.79 -6.81 -6.81 -10.07 12.16 235.92 0.01 MWD None 42 2878.16 0.23 190.81 115.31 2878.10 -7.26 -7.26 -10.19 12.51 234.55 0.00 MWD None 43 2950.00 0.26 140.59 71.84 2949.94 -7.52 -7.52 -10.11 12.61 233.35 0.03 MWD None 44 2979.00 0.26 140.59 29.00 2978.94 -7.63 -7.63 -10.03 12.60 232.76 0.00 Proj. to TD [(c)2004 IDEAL ID9_1C_01]