SCHLUMBERGER Survey report 13-Nov-2007 17:50:49 Page 1 of 2 Client...................: Japan Agency for Marine-Earth Science and Techology Field....................: Nankai-Kumano Well.....................: C0006B Spud date................: 13-Nov-07 API number...............: 07CHS0064 Last survey date.........: 13-Nov-07 Engineer.................: M. Jakulj/C. Xi/Q.G. Ming Total accepted surveys...: 10 MD of first survey.......: 3900.00 m Rig:.....................: Chikyu MD of last survey........: 4139.11 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............: 12-Nov-2007 Magnetic field strength..: 916.58 HCNT ----- Depth reference ----------------------- Magnetic dec (+E/W-).....: -6.45 degrees Permanent datum..........: Mean Sea Level Magnetic dip.............: 46.37 degrees Depth reference..........: Drill Floor GL above permanent.......: 3871.50 m ----- MWD survey Reference Criteria --------- KB above permanent.......: 28.50 m Reference G..............: 999.57 mGal DF above permanent.......: 28.50 m Reference H..............: 916.58 HCNT Reference Dip............: 46.37 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-).....: -6.45 degrees Departure (+E/W-)........: 0.00 m Grid convergence (+E/W-).: 0.00 degrees Total az corr (+E/W-)....: -6.45 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 13-Nov-2007 17:50:49 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 3900.00 0.00 0.00 0.00 3900.00 0.00 0.00 0.00 0.00 0.00 0.00 TIP None 2 3910.73 0.69 312.05 10.73 3910.73 0.04 0.04 -0.05 0.06 312.05 0.64 MWD None 3 3945.87 2.98 265.93 35.14 3945.85 0.12 0.12 -1.12 1.12 276.14 0.73 MWD None 4 3983.74 3.54 274.65 37.87 3983.66 0.15 0.15 -3.26 3.27 272.55 0.20 MWD None 5 4026.61 4.27 295.73 42.87 4026.43 0.95 0.95 -6.02 6.09 278.92 0.37 MWD None 6 4064.18 4.57 301.45 37.57 4063.89 2.33 2.33 -8.56 8.87 285.25 0.14 MWD None 7 4085.42 4.53 301.49 21.24 4085.06 3.21 3.21 -9.99 10.50 287.82 0.02 MWD None 8 4098.80 3.72 294.49 13.38 4098.41 3.67 3.67 -10.84 11.44 288.70 0.71 MWD None 9 4123.44 4.79 307.38 24.64 4122.98 4.62 4.62 -12.39 13.22 290.48 0.58 MWD None 10 4139.11 4.96 308.29 15.67 4138.59 5.44 5.44 -13.44 14.50 292.05 0.12 MWD None [(c)2007 IDEAL ID12_0C_12]