Table T12. Logging operations summary, Site 1167.
|
Operations
depth summary
|
Run 1
|
LWD/MWD
|
Comments
|
|---|---|---|---|
| Holes 1167A and 1167B | Triple combo | Power Pulse CDR | Logging operations commenced at 1700 on 2/27/00. Wiper trip, sepiolite was circulated; no KCl used. Sea state/heave: average 2.5 m; maximum 4.5 m. |
| Water depth, seafloor or mudline: | |||
| Mudline (mbrf): driller's depth | 1651.3 | Run into hole speed = 7000 ft/hr. | |
| Mudline (mbrf): logger's depth | 1649.0 | 1652.0 | Triple combo uprun speed = 500-900 ft/hr. |
| Mudline (mbsl) | 1640.3 | 1641.0 | LWD/MWD average rate of penetration = 20 m/hr (calculation includes time for making drill-pipe connections). |
| Drill-pipe depth during logging: | Logging operations ceased at 0930 on 2/29/00. | ||
| Initial pipe depth (mbrf): driller's depth | 1738.3 | ||
| Initial pipe depth (mbsf): using driller's depth | 87.0 | Initial pipe depth was set at 86.95 mbsf. | |
| Final pipe depth (mbrf): driller's depth | 1738.3 | 1913.1 | |
| Final pipe depth (mbrf): depth from logs | 1734.0 | ||
| Final pipe depth (mbsf): using driller's depth | 87.0 | 262.1 | |
| Final pipe depth (mbsf): using logger's depth | 85.0 | Final pipe depth = initial log depth. | |
| Sticking encountered during logging: | |||
| Depth of first bridge or ledge (mbrf; winch) | 1740.0 | Tool got stuck at a bridge only 12 m below the base of the pipe. Fluid was pumped downhole until pressure increased enough to release the tool. | |
| Depth of first bridge or ledge (mbsf) | 91.0 | ||
| Depth of second bridge or ledge (mbrf; winch) | 1800.0 | A second bridge was encountered at 151 mbsf; the tool could not break through this obstruction. | |
| Depth of second bridge or ledge (mbsf) | 151.0 | ||
| Final tool depth: | |||
| (mbrf; winch) | 1800.0 | 1913.1 | |
| (mbsf): using logger's depth | 151.0 | 261.1 | |
| Total hole depth (m): | 447.5 | 261.1 | Wireline logging failed to reach total cored depth; however, the upper 265 m was successfully logged with LWD/MWD. |
| Length of logging run (m): | 66.0 | 261.1 |
Note: CDR = compensated dual resistivity tool; LWD = logging while drilling; MWD = measurement while drilling; mbrf = meters below rig floor; mbsl = meters below sea level.