Table T17. Logging operations summary, Hole 1165C.
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Run 1
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Run 2
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Operations
depth summary
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Triple combo
(main) |
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FMS-sonic
(pass 1) |
Comments
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| Water depth, seafloor or mudline: | Logging operations commenced at 0700 hr on 02/13/00. A total of 30 barrels of sepiolite was circulated; no KCl used. Sea state/heave: average 1.0-1.5 m; maximum 3.2 m. | |||
| Mudline (mbrf): driller's depth | 3548.7 | 3548.7 | Run into hole speed = 10,000 ft/hr. | |
| Mudline (mbrf): logger's depth | 3546.5 | Triple combo uprun speed = 900 ft/hr. | ||
| Mudline (mbsl) | 3537.6 | 3537.6 | FMS-sonic uprun speed = 500 ft/hr. | |
| Logging operations ceased at 0940 hr on 02/14/00. | ||||
| Drill-pipe depth during logging: | ||||
| Initial pipe depth (mbrf): driller's depth | 3638.4 | 3724.6 | Drill pipe initially set at 89.7 mbsf, then three stands of pipe were added to 175.9 mbsf to push through an obstruction. | |
| Initial pipe depth (mbsf): using driller's depth | 89.7 | 175.9 | ||
| Final pipe depth (mbrf): driller's depth | 3724.6 | 3724.6 | Drill pipe remained in place at 175.9 mbsf throughout logging operations to prevent the possibility of the logging tools getting stuck on the uprun. | |
| Final pipe depth (mbrf): depth from logs | 3721 | 3721 | ||
| Final pipe depth (mbsf): using driller's depth | 175.9 | 175.9 | ||
| Final pipe depth (mbsf): using logger's depth | 174.5 | 174.5 | Final pipe depth = initial log depth. | |
| Sticking encountered during logging: | ||||
| Depth of first bridge or ledge (mbrf; winch) | 3666 | 3850 | First ledge encountered at 119 mbsf, 20 m below the base of the pipe. Attempts to break through the obstruction failed, so the tool string was partially rigged down and three stands of drill pipe were added. Pipe remained in place at this depth throughout the logging operations. | |
| Depth of first bridge or ledge (mbsf) | 119 | 303 | ||
| Depth of second bridge or ledge (mbrf; winch) | 3742 | 4131 | ||
| Depth of second bridge or ledge (mbsf) | 195 | 584 | ||
| Depth of third bridge or ledge (mbrf; winch) | 3850 | |||
| Depth of third bridge or ledge (mbsf) | 303 | Second and third ledges, encountered at 195 and 303 mbsf, posed no real threat to operations on either run. | ||
| Depth of fourth bridge or ledge (mbrf; winch) | 4132 | |||
| Depth of fourth bridge or ledge (mbsf) | 585 | A tight spot at 585 mbsf prevented run 2 from reaching bottom. | ||
| Final tool depth: | ||||
| (mbrf; winch) | 4542.5 | 4131.8 | Triple combo reached bottom, but FMS-sonic was halted by an obstruction at 585 mbsf, where sticking was noted on first run. | |
| (mbsf): using logger's depth | 996.0 | 585.3 | ||
| Total hole depth (m): | 999.1 | 999.1 | ||
| Length of logging run (m): | 821.5 | 410.8 |
Note: FMS = Formation MicroScanner; mbrf = meters below rig floor; mbsl = meters below sea level.