Table T1. Operations summary, Site C0001. (See table notes.)
| Hole C0001A |
| Latitude: 33°14.2945′N |
| Longitude: 136°42.7139′E |
| Seafloor (drill pipe measurement from rig floor, m): 2228 |
| Distance between rig floor and sea level (m): 28.5 |
| Water depth (drill pipe measurement from sea level, m): 2199.5 |
| Hole C0001B |
| Latitude: 33°14.3135′N |
| Longitude: 136°42.7252′E |
| Seafloor (drill pipe measurement from rig floor, m): 2217.4 |
| Distance between rig floor and sea level (m): 28.5 |
| Water depth (drill pipe measurement from sea level, m): 2188.9 |
| Hole C0001C |
| Latitude: 33°14.3345′N |
| Longitude: 136°42.7014′E |
| Seafloor (drill pipe measurement from rig floor, m): 2226.5 |
| Distance between rig floor and sea level (m): 28.5 |
| Water depth (drill pipe measurement from sea level, m): 2198 |
| Hole C0001D |
| Latitude: 33°14.3286′N |
| Longitude: 136°42.7040′E |
| Seafloor (drill pipe measurement from rig floor, m): 2226 |
| Distance between rig floor and sea level (m): 28.5 |
| Water depth (drill pipe measurement from sea level, m): 2197.5 |
| Operation | Start | Depth (m LSF) |
Drilled (m LSF) |
Comments | ||
|---|---|---|---|---|---|---|
| Date (2007) |
Local time (h) |
|||||
| Top | Bottom | |||||
| Hole C0001A pilot hole | 0 | 1000 | 1000 | 8-1/2 inch MWD-APWD-GR | ||
| Tool preparation—tests | 23 Sep | 1430 | ||||
| Tool rig up | 23 Sep | 1530 | ||||
| Run into hole | 24 Sep | 0230 | Delays resulted from GR shallow test and sinker bar release fall | |||
| ROV survey | ||||||
| Tag seafloor | 25 Sep | 1200 | ||||
| Spud-in | 25 Sep | 1215 | ||||
| Reach total depth | 27 Sep | 1245 | ||||
| Pull tools out of hole | 27 Sep | 1245 | ||||
| Recover tools on rig floor | 28 Sep | 1200 | Sign of packing off, stool stuck because of poor hole condition at 2623 and 2726 m DRF | |||
| Hole C0001B geotechnical coring hole | 0 | 30.6 | 30.6 | 8-1/2 inch HPCS coring | ||
| Tool preparation | 29 Sep | 0315 | ||||
| Coring | 30 Sep | 0000 | ||||
| Hole C0001C LWD hole | 0 | 77.5 | 77.5 | 8-1/2 inch LWD (GVR-sonic-SVWD-MWD-APWD-ADN) | ||
| Tool rig up | 1 Oct | 0000 | ||||
| Install R/I source | 1 Oct | 0500 | ||||
| Run into hole | 1 Oct | 0540 | ||||
| Shallow test | 1 Oct | 0745 | SVWD check shot test, repair geolograph failure | |||
| ROV survey | 1 Oct | 1840 | ||||
| Tag seafloor | 1 Oct | 1840 | ||||
| Spud-in | 1 Oct | 1915 | ||||
| Deviation survey | 2 Oct | 0230 | Deviation survey results: 6° at 2266 m DRF, 5.45° at 2304 m DRF | |||
| Reach total depth | 2 Oct | 0530 | POOH at 2304 m DRF because of deviation | |||
| Pull tools out of hole | 2 Oct | 0530 | Position nearby for new Hole C0001D | |||
| Hole C0001D LWD hole | 0 | 976 | 976 | 8-1/2 inch LWD (GVR-sonic-SVWD-MWD-APWD-ADN) | ||
| ROV survey | 2 Oct | 0530 | ||||
| Spud-in | 2 Oct | 0740 | ||||
| Ream and sweep | 3 Oct | 1245 | Sticky hole condition needed reaming and sweeping | |||
| Rig floor maintenance | 4 Oct | 0730 | Short trip 2600 m DRF for WL BOP maintenance | |||
| Ream and sweep | 4 Oct | 1615 | ||||
| Reach total depth | 6 Oct | 1030 | adnVISION lost communication for real-time monitor | |||
| Pull tools out of hole | 6 Oct | 1200 | ||||
| Recover tools on rig floor | 7 Oct | 0000 | ||||
| Recover data | 7 Oct | 0100 | GVR and sonic data recovered, SVWD data sent to Fuchinobe and ADN to China | |||
Notes: DRF = drillers depth below rig floor, LSF = LWD depth below seafloor. MWD = measurement while drilling, APWD = annular pressure while drilling, ADN = Azimuthal Density Neutron tool (adnVISION). LWD = logging while drilling, GVR = geoVISION resistivity tool. sonic = sonic while drilling (sonicVISION), SVWD = seismicVISION while drilling, GR = gamma radiation. ROV = remotely operated vehicle. R/I = radioactive, POOH = pull out of hole, WL = wireline, BOP = blowout preventer, HPCS = hydraulic piston coring system, DRT = drillers depth below rotary table.
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