ANADRILL SCHLUMBERGER Survey report 13-Nov-2001 12:57:10 Page 1 of 3 Client...................: Bass Strait Oil Company Field....................: Permit VIC/P42 Well.....................: Melville-1 Spud date................: 17-Oct-01 API number...............: Last survey date.........: 13-Nov-01 Engineer.................: A. Abad / M. Saicic Total accepted surveys...: 60 MD of first survey.......: 1432.10 m COUNTY:..................: Ocean Bounty MD of last survey........: 3345.00 m STATE:...................: Victoria ----- Survey calculation methods------------- ----- Geomagnetic data ---------------------- Method for positions.....: Minimum curvature Magnetic model...........: BGGM version 2000 Method for DLS...........: Mason & Taylor Magnetic date............: 24-Oct-2001 Magnetic field strength..: 1206.71 HCNT ----- Depth reference ----------------------- Magnetic dec (+E/W-).....: 13.17 degrees Permanent datum..........: GROUND LEVEL Magnetic dip.............: -69.20 degrees Depth reference..........: Drillers Pipe Tally GL above permanent.......: -100.00 m ----- MWD survey Reference Criteria --------- KB above permanent.......: 75.00 m Reference G..............: 1000.07 mGal DF above permanent.......: 25.00 m Reference H..............: 1206.71 HCNT Reference Dip............: -69.20 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-).........: 5,717,796 m Magnetic dec (+E/W-).....: 13.17 degrees Departure (+E/W-)........: 585, 729.8 m Grid convergence (+E/W-).: -1.17 degrees Total az corr (+E/W-)....: 14.34 degrees Azimuth from rotary table to target: 0.00 degrees (Total az corr = magnetic dec - grid conv) Sag applied (Y/N)........: No degree: 0.00 [(c)2001 Anadrill IDEAL ID6_1C_10] ANADRILL SCHLUMBERGER Survey Report 13-Nov-2001 12:57:10 Page 2 of 3 === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 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 qual - (m) (deg) (deg) (m) (m) (m) (m) (m) (m) (deg) 10m) type type === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 1 1432.10 2.40 228.90 0.00 1432.00 -2.80 -2.80 -1.60 3.22 209.74 0.00 TIP - 2 1443.09 2.50 236.20 10.99 1442.98 -3.08 -3.08 -1.97 3.66 212.60 0.30 MWD 6-axis 3 1494.71 2.59 236.48 51.62 1494.55 -4.35 -4.35 -3.88 5.83 221.70 0.02 MWD 6-axis 4 1557.58 2.56 237.49 62.87 1557.36 -5.89 -5.89 -6.25 8.59 226.67 0.01 MWD 6-axis 5 1615.86 2.80 236.37 58.28 1615.57 -7.38 -7.38 -8.53 11.28 229.13 0.04 MWD 6-axis 6 1644.61 2.69 236.51 28.75 1644.29 -8.14 -8.14 -9.68 12.65 229.93 0.04 MWD 6-axis 7 1668.50 2.86 238.36 23.89 1668.15 -8.77 -8.77 -10.65 13.80 230.56 0.08 MWD 6-axis 8 1699.25 2.65 238.80 30.75 1698.87 -9.54 -9.54 -11.92 15.26 231.33 0.07 MWD 6-axis 9 1727.71 2.60 239.64 28.46 1727.30 -10.20 -10.20 -13.03 16.55 231.95 0.02 MWD 6-axis 10 1756.63 2.51 238.85 28.92 1756.19 -10.86 -10.86 -14.14 17.83 232.48 0.03 MWD 6-axis 11 1786.00 2.34 240.28 29.37 1785.53 -11.49 -11.49 -15.21 19.07 232.93 0.06 MWD 6-axis 12 1814.34 2.29 240.62 28.34 1813.85 -12.06 -12.06 -16.21 20.20 233.36 0.02 MWD 6-axis 13 1843.18 2.18 239.19 28.84 1842.67 -12.62 -12.62 -17.18 21.32 233.70 0.04 MWD 6-axis 14 1901.41 1.96 237.87 58.23 1900.86 -13.72 -13.72 -18.98 23.42 234.14 0.04 MWD 6-axis 15 1931.65 1.78 237.81 30.24 1931.08 -14.24 -14.24 -19.81 24.40 234.29 0.06 MWD 6-axis 16 1960.46 1.72 237.86 28.81 1959.88 -14.71 -14.71 -20.56 25.28 234.41 0.02 MWD 6-axis 17 1989.04 1.62 235.40 28.58 1988.45 -15.17 -15.17 -21.25 26.11 234.49 0.04 MWD 6-axis 18 2047.36 1.44 230.77 58.32 2046.74 -16.10 -16.10 -22.50 27.67 234.41 0.04 MWD 6-axis 19 2075.90 1.46 228.72 28.54 2075.28 -16.57 -16.57 -23.05 28.39 234.30 0.02 MWD 6-axis 20 2104.97 1.26 223.46 29.07 2104.34 -17.04 -17.04 -23.55 29.07 234.11 0.08 MWD 6-axis 21 2133.36 1.26 222.20 28.39 2132.72 -17.50 -17.50 -23.97 29.68 233.87 0.01 MWD 6-axis 22 2161.89 1.14 222.54 28.53 2161.24 -17.94 -17.94 -24.38 30.27 233.64 0.04 MWD 6-axis 23 2190.93 1.21 218.85 29.04 2190.28 -18.39 -18.39 -24.76 30.85 233.40 0.04 MWD 6-axis 24 2220.38 1.11 218.25 29.45 2219.72 -18.86 -18.86 -25.13 31.42 233.12 0.03 MWD 6-axis 25 2249.29 1.04 218.39 28.91 2248.63 -19.29 -19.29 -25.47 31.95 232.87 0.02 MWD 6-axis 26 2278.19 0.90 218.62 28.90 2277.52 -19.67 -19.67 -25.78 32.42 232.65 0.05 MWD 6-axis 27 2307.52 0.99 219.17 29.33 2306.85 -20.04 -20.04 -26.08 32.89 232.45 0.03 MWD 6-axis 28 2336.95 1.01 219.68 29.43 2336.27 -20.44 -20.44 -26.41 33.39 232.26 0.01 MWD 6-axis 29 2365.20 0.95 216.00 28.25 2364.52 -20.82 -20.82 -26.70 33.86 232.05 0.03 MWD 6-axis 30 2394.92 1.02 211.37 29.72 2394.24 -21.25 -21.25 -26.98 34.35 231.78 0.04 MWD 6-axis [(c)2001 Anadrill IDEAL ID6_1C_10] ANADRILL SCHLUMBERGER Survey Report 13-Nov-2001 12:57:10 Page 3 of 3 === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 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 qual - (m) (deg) (deg) (m) (m) (m) (m) (m) (m) (deg) 10m) type type === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 31 2422.33 1.09 213.07 27.41 2421.64 -21.67 -21.67 -27.25 34.82 231.51 0.03 MWD 6-axis 32 2480.97 1.04 210.77 58.64 2480.27 -22.60 -22.60 -27.83 35.85 230.92 0.01 MWD 6-axis 33 2538.48 1.07 207.79 57.51 2537.77 -23.52 -23.52 -28.35 36.84 230.31 0.01 MWD 6-axis 34 2558.35 1.06 210.59 19.87 2557.64 -23.84 -23.84 -28.53 37.18 230.11 0.03 MWD 6-axis 35 2590.86 1.13 214.63 32.50 2590.13 -24.37 -24.37 -28.86 37.77 229.83 0.03 MWD 6-axis 36 2648.71 1.10 221.39 57.86 2647.98 -25.25 -25.25 -29.55 38.87 229.49 0.02 MWD 6-axis 37 2677.84 1.17 224.01 29.13 2677.10 -25.68 -25.68 -29.95 39.45 229.39 0.03 MWD 6-axis 38 2743.69 1.35 230.93 65.85 2742.94 -26.65 -26.65 -31.02 40.89 229.33 0.04 MWD 6-axis 39 2772.78 1.31 229.00 29.09 2772.02 -27.08 -27.08 -31.53 41.57 229.34 0.02 MWD 6-axis 40 2801.94 1.34 230.09 29.16 2801.17 -27.52 -27.52 -32.05 42.24 229.34 0.01 MWD 6-axis 41 2830.87 1.60 226.88 28.93 2830.09 -28.01 -28.01 -32.60 42.98 229.33 0.09 MWD 6-axis 42 2862.03 1.75 228.47 31.16 2861.24 -28.63 -28.63 -33.27 43.89 229.29 0.05 MWD 6-axis 43 2889.90 2.04 226.84 27.87 2889.10 -29.25 -29.25 -33.95 44.81 229.26 0.11 MWD 6-axis 44 2919.06 2.08 227.19 29.16 2918.24 -29.96 -29.96 -34.72 45.86 229.21 0.01 MWD 6-axis 45 2948.01 1.81 221.56 28.95 2947.17 -30.66 -30.66 -35.41 46.84 229.11 0.11 MWD 6-axis 46 2977.28 1.63 219.95 29.27 2976.43 -31.33 -31.33 -35.98 47.71 228.96 0.06 MWD 6-axis 47 3005.24 1.51 212.47 27.96 3004.38 -31.94 -31.94 -36.44 48.46 228.76 0.08 MWD 6-axis 48 3033.85 1.32 208.32 28.61 3032.98 -32.55 -32.55 -36.80 49.13 228.50 0.08 MWD 6-axis 49 3063.37 0.92 208.53 29.52 3062.49 -33.06 -33.06 -37.07 49.67 228.27 0.14 MWD 6-axis 50 3086.82 0.89 200.42 23.45 3085.94 -33.39 -33.39 -37.22 50.01 228.10 0.06 MWD 6-axis 51 3119.68 0.65 170.45 32.86 3118.80 -33.82 -33.82 -37.28 50.33 227.79 0.14 MWD 6-axis 52 3149.04 1.19 129.46 29.36 3148.15 -34.18 -34.18 -37.02 50.38 227.29 0.28 MWD 6-axis 53 3177.87 1.26 140.82 28.83 3176.98 -34.61 -34.61 -36.59 50.36 226.59 0.09 MWD 6-axis 54 3206.58 1.60 135.02 28.71 3205.68 -35.14 -35.14 -36.10 50.38 225.78 0.13 MWD 6-axis 55 3237.14 1.95 129.83 30.56 3236.22 -35.77 -35.77 -35.40 50.33 224.70 0.13 MWD 6-axis 56 3264.76 2.44 130.63 27.62 3263.82 -36.46 -36.46 -34.60 50.26 223.50 0.18 MWD 6-axis 57 3294.49 2.68 134.69 29.73 3293.52 -37.36 -37.36 -33.62 50.26 221.99 0.10 MWD 6-axis 58 3317.25 2.89 133.42 22.76 3316.26 -38.13 -38.13 -32.83 50.31 220.73 0.10 MWD 6-axis 59 3329.04 2.96 135.16 11.79 3328.03 -38.55 -38.55 -32.40 50.35 220.04 0.10 MWD 6-axis 60 3345.00 3.00 137.00 15.96 3343.97 -39.15 -39.15 -31.82 50.45 219.11 0.06 Projection [(c)2001 Anadrill IDEAL ID6_1C_10]