Table T2. Summary of operations for Pacific equatorial Expedition 321.
| Site |
Location (latitude, longitude) |
Seafloor depth (mbrf) |
Operations description | Duration (days) | |||
|---|---|---|---|---|---|---|---|
| Task | Transit | Drilling/Coring | Logging | ||||
|
Honolulu, Hawaii |
Begin expedition |
5.00 |
|
|
|||
|
|
Transit ~1128 nmi to Site PEAT-2C at 10.5 kt |
|
4.4 |
|
|||
|
PEAT-2C EPSP approved to 250 mbsf |
11°54.711′N, 141°02.744′W |
4952
|
Hole A: APC ~70 m/XCB to ~163 mbsf (~1 m into basement) - 3 APCT-3 and 2 DVTP temperature measurements - Wireline logging with triple combo and FMS-sonic |
|
|
2.2 |
1.0 |
| Hole B: APC ~70 m/XCB to ~162 mbsf |
|
|
1.8 |
|
|||
|
Subtotal days on site: |
3.2 | ||||||
|
|
Transit ~961 nmi to Site PEAT-6C at 10.5 kt |
|
3.8 |
|
|||
|
PEAT-6C EPSP approved to 400 mbsf |
05°18.736′N, 126°16.997′W |
4362
|
Hole A: APC ~70 m/XCB to ~363 mbsf (~1 m into basement) - 3 APCT-3 and 2 DVTP temperature measurements - Wireline logging with triple combo and FMS-sonic - VSP with VSI |
|
|
3.5 |
1.5 |
| Hole B: APC ~70 m/XCB to ~362 mbsf |
|
|
2.9 |
|
|||
| Hole C: APC ~70 m/XCB to ~362 mbsf |
|
|
3.3 |
|
|||
|
Subtotal days on site: |
11.2 | ||||||
|
|
Transit ~204 nmi to Site PEAT-7C at 10.5 kt |
|
0.8 |
|
|||
|
PEAT-7C EPSP approved to 480 mbsf |
03°50.009′N, 123°12.352′W |
4502
|
Hole A: APC ~70 m/XCB to ~453 mbsf (~1 m into basement) - 3 APCT-3 and 2 DVTP temperature measurements - Wireline logging with triple combo and FMS-sonic |
|
|
4.2 |
1.1 |
| Hole B: APC ~70 m/XCB to ~452 mbsf |
|
|
3.6 |
|
|||
| Hole C: APC ~70 m/XCB to ~452 mbsf |
|
|
3.9 |
|
|||
|
Subtotal days on site: |
12.8 | ||||||
|
|
Transit ~1726 nmi to San Diego, California, at 10.5 kt |
|
6.8 |
|
|||
|
San Diego, California |
Discharge science party |
2.0 |
|
|
|||
|
|
Juan de Fuca remedial cementing* |
|
|||||
|
|
Transit ~1134 nmi to Hole U1301B at 10.5 kt |
|
4.5 |
|
|||
| Hole U1301B | 47.7538°N, 127.7638°W |
2667
|
Install DP stabilizing collar for cementing operations; reenter hole (1.1 days) Pump additional cement into reentry hole/POOH (0.4 days) |
|
|
1.5 |
|
|
Subtotal days on site: |
1.5 | ||||||
|
|
|
|
DP offset ~36 m (0.7 nmi) to Hole U1301A at 0.5 kt |
|
0.0 |
|
|
| Hole U1301A | 47.7535°N, 127.7639°W |
2671
|
Reenter Hole U1301A after offsetting from Hole U1301B (0.6 days) Pump additional cement into reentry hole/POOH (0.5 days) Recover drill string/continue to ensure all holes plugged with cement (1.4 days) |
|
|
2.5 |
|
|
Subtotal days on site: |
2.5 |
|
|
||||
|
|
Transit ~187 nmi to Astoria, Oregon, at 10.5 kt |
|
0.7 |
|
|||
|
Astoria, Oregon |
End expedition |
|
21.0 |
29.4 |
3.6 | ||
|
|
Subtotal time on site: |
33.0 | |||||
|
|
Total operating days: |
54.0 | |||||
|
|
Total expedition (including 7 port call days): |
61.0 | |||||
Notes: Seafloor depth = prospectus water depth plus 11.0 m adjustment from water line to rig floor (i.e., drillers depth). * = Details on the Juan de Fuca remedial cementing operations can be found at iodp.tamu.edu/scienceops/expeditions/juan_de_fuca.html. All costs associated with the Juan de Fuca "remedial cementing" program will be calculated in a separate IPE and are not included in this Pacific equatorial 2 IPE. The Juan de Fuca program is included in the operating plan only because it impacts operations. APC = advanced piston corer, XCB = extended core barrel, APCT-3 = advanced piston corer temperature-3 tool, DVTP = Davis-Villinger Temperature Probe, triple combo = triple combination, FMS-sonic = Formation MicroScanner-sonic tool string, VSP = vertical seismic profile, VSI = Vertical Seismic Imager, DP = dynamic positioning, POOH = pull out of hole.
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