SCHLUMBERGER Survey report 22-Oct-2007 11:36:01 Page 1 of 2 Client...................: Japan Agency for Marine-Earth Science and Technology Field....................: Nankai-Kumano Well.....................: C0003A Spud date................: 20-Oct-07 API number...............: 07CHS0064 Last survey date.........: 21-Oct-07 Engineer.................: Mario Jakulj / Chen Xi / QG Ming Total accepted surveys...: 13 MD of first survey.......: 2481.50 m Rig:.....................: Chikyu MD of last survey........: 2958.65 m Country:.................: Japan ----- Survey calculation methods------------- ----- Geomagnetic data ---------------------- Method for positions.....: Minimum curvature Magnetic model...........: BGGM version 2007 Method for DLS...........: Mason & Taylor Magnetic date............: 20-Oct-2007 Magnetic field strength..: 915.50 HCNT ----- Depth reference ----------------------- Magnetic dec (+E/W-).....: -6.47 degrees Permanent datum..........: Mean Sea Level Magnetic dip.............: 46.53 degrees Depth reference..........: Driller's Depth GL above permanent.......: -2453.00 m ----- MWD survey Reference Criteria --------- KB above permanent.......: 28.50 m Reference G..............: 999.59 mGal DF above permanent.......: 28.50 m Reference H..............: 915.53 HCNT Reference Dip............: 46.54 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-).....: -6.47 degrees Departure (+E/W-)........: 0.00 m Grid convergence (+E/W-).: 0.00 degrees Total az corr (+E/W-)....: -6.47 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)2007 IDEAL ID12_0C_12] SCHLUMBERGER Survey Report 22-Oct-2007 11:36:01 Page 2 of 2 === ======== ====== ======= ====== ======== ======== ================ =============== ===== ===== ====== 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 2481.50 0.00 0.00 0.00 2481.50 0.00 0.00 0.00 0.00 0.00 0.00 TIP None 2 2486.70 0.28 114.34 5.20 2486.70 -0.01 -0.01 0.01 0.01 114.34 0.54 MWD None 3 2534.06 1.39 34.83 47.36 2534.06 0.42 0.42 0.45 0.61 46.76 0.29 MWD None 4 2572.62 0.71 17.82 38.56 2572.61 1.03 1.03 0.79 1.30 37.33 0.19 MWD None 5 2610.72 0.86 24.16 38.10 2610.70 1.52 1.52 0.97 1.80 32.74 0.05 MWD None 6 2649.68 0.59 7.96 38.96 2649.66 1.98 1.98 1.12 2.28 29.53 0.09 MWD None 7 2687.89 0.80 4.01 38.21 2687.87 2.44 2.44 1.17 2.71 25.56 0.06 MWD None 8 2725.49 0.79 0.19 37.60 2725.47 2.96 2.96 1.19 3.19 21.83 0.01 MWD None 9 2767.24 0.89 359.80 41.75 2767.21 3.58 3.58 1.19 3.77 18.37 0.02 MWD None 10 2807.09 0.99 1.82 39.85 2807.06 4.23 4.23 1.20 4.39 15.80 0.03 MWD None 11 2842.20 1.21 4.11 35.11 2842.16 4.90 4.90 1.23 5.05 14.12 0.06 MWD None 12 2879.94 1.29 7.02 37.74 2879.89 5.72 5.72 1.31 5.87 12.93 0.03 MWD None 13 2958.65 1.39 6.45 78.71 2958.58 7.55 7.55 1.53 7.70 11.45 0.01 MWD None [(c)2007 IDEAL ID12_0C_12]