|
|
Run 1
triple combo (main) |
Run 2
FMS-sonic-NGT (passes 1 and 2) |
Comments
|
|---|---|---|---|
| Water depth, seafloor, or mud line: | Logging operations commenced at 1115 hr on 12 Apr 2001. Wiper trip, hole displaced, 150 bbl of sepiolite was used; no KCl. Sea state/heave: average = 0.4 m; max = 0.92 m. | ||
| Mud line (mbrf; driller's depth) | 5720 | 5720 | Run into hole (RIH) speed = 4000-5000 ft/hr |
| Mud line (mbrf; logger's depth) | 5723 | 5723 | Triple combo uphole speed = 900 and 1800 ft/hr in sticky intervals (417-467 mbsf). FMS-sonic-NGT uphole speed, both passes = 900 ft/hr. Logging operations ceased at 1330 hr on 13 Apr 2001. |
| Drill pipe depth during logging: | |||
| Pipe depth (mbrf; driller's depth) | 5800 | 5800 | |
| Pipe depth (mbsf; using driller's depth) | 80 | 80 | Initial pipe depth was set at 80 mbsf, and pipe remained at that depth throughout logging operations to prevent borehole collapse in the soft upper sediments. |
| Pipe depth (mbrf; depth from logs) | 5799.5 | 5799.5 | |
| Pipe depth (mbsf; using logger's depth) | 76.5 | 76.5 | |
| Sticking encountered during logging: | No ledges or bridges were encountered on the first RIH with the triple combo tool string, but sticky intervals that were slow to get through were encountered at 5830 and between 6140 and 6190 mbrf. The FMS-sonic-NGT runs were hampered by these same sticky intervals and only reached 6075-6090 mbrf, so the basement interval could not be logged. | ||
| Depth of first sticky interval (mbrf; winch) | 5830 | 5830 | |
| Depth of first sticky interval (mbsf) | 107 | 107 | |
| Depth of second sticky interval (mbrf; winch) | 6140-6190 | 6075-6090 | |
| Depth of second sticky interval (mbsf) | 417-467 | 352-367 | |
| Final tool depth: | Hole conditions were good, with the caliper reading on gauge in the basement section up to 6235 mbrf. In the sediments, hole size varied from 18 in to below bit size in the tight spot at 6140 mbrf. | ||
| Final tool depth (mbrf; winch) | 6314 | 6089 | |
| Final tool depth (mbsf; using logger's depth) | 591 | 366 | |
| Total hole depth (m): | 600 | 600 | Log data are generally good, although some problems were encountered as a result of a default speed correction applied by the acquisition software. See "Data Quality" in "Downhole Measurements"for further explanation. |
| Length of logging run (m): | 514.5 | 289.5 |
Note: Triple combo = triple combination tool string, FMS = Formation MicroScanner, NGT = natural gamma spectrometry tool.