SCHLUMBERGER Survey report 3-Nov-2007 14:33:08 Page 1 of 2 Client...................: Japan Agency for Marine-Earth Science and Technology Field....................: Nankai-Kumano Well.....................: C0004B Spud date................: 02-Nov-07 API number...............: 07CHS0064 Last survey date.........: 03-Nov-07 Engineer.................: Mario Jakulj / Chen Xi / QG Ming Total accepted surveys...: 13 MD of first survey.......: 2665.50 m Rig:.....................: Chikyu MD of last survey........: 3047.37 m STATE:...................: Japan ----- Survey calculation methods------------- ----- Geomagnetic data ---------------------- Method for positions.....: Minimum curvature Magnetic model...........: BGGM version 2007 Method for DLS...........: Mason & Taylor Magnetic date............: 02-Nov-2007 Magnetic field strength..: 915.40 HCNT ----- Depth reference ----------------------- Magnetic dec (+E/W-).....: -6.47 degrees Permanent datum..........: Mean Sea Level Magnetic dip.............: 46.53 degrees Depth reference..........: Drill Floor GL above permanent.......: -2637.00 m ----- MWD survey Reference Criteria --------- KB above permanent.......: 28.50 m Reference G..............: 999.59 mGal DF above permanent.......: 28.50 m Reference H..............: 915.40 HCNT Reference Dip............: 46.53 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 3-Nov-2007 14:33:08 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 2665.50 0.00 0.00 0.00 2665.50 0.00 0.00 0.00 0.00 0.00 0.00 TIP None 2 2666.22 0.32 110.55 0.72 2666.22 -0.00 -0.00 0.00 0.00 110.55 4.45 MWD None 3 2672.02 0.50 60.50 5.80 2672.02 0.01 0.01 0.04 0.04 81.17 0.66 MWD None 4 2703.64 1.20 86.45 31.62 2703.64 0.09 0.09 0.49 0.50 79.07 0.25 MWD None 5 2742.32 1.13 127.64 38.68 2742.31 -0.11 -0.11 1.20 1.20 95.41 0.21 MWD None 6 2781.07 1.02 129.01 38.75 2781.05 -0.56 -0.56 1.77 1.85 107.70 0.03 MWD None 7 2818.69 1.05 121.02 37.62 2818.67 -0.95 -0.95 2.32 2.51 112.30 0.04 MWD None 8 2855.31 1.19 114.46 36.62 2855.28 -1.28 -1.28 2.96 3.22 113.46 0.05 MWD None 9 2896.83 1.10 100.57 41.52 2896.79 -1.53 -1.53 3.74 4.04 112.30 0.07 MWD None 10 2932.70 1.21 91.97 35.87 2932.65 -1.61 -1.61 4.46 4.74 109.87 0.06 MWD None 11 2970.67 1.52 90.59 37.97 2970.61 -1.63 -1.63 5.36 5.60 106.90 0.08 MWD None 12 3009.38 1.44 78.47 38.71 3009.31 -1.54 -1.54 6.35 6.53 103.61 0.08 MWD None 13 3047.37 1.42 78.99 37.99 3047.29 -1.35 -1.35 7.28 7.41 100.52 0.01 MWD None [(c)2007 IDEAL ID12_0C_12]