Table T1. Operations plan.
| Site | Location (latitude, longitude) |
Seafloor depth (mbsf) |
Operations description | Duration (days) | |||
|---|---|---|---|---|---|---|---|
| Task | Transit | Drilling/ Coring |
Logging | ||||
| Yokohama, Japan |
|
|
|
||||
| Transit 1115 nmi to Site SRNH-2 @ 10.5 kt | 4.4 |
|
|
||||
| SRNH-2 | 38°04.400'N 162°38.710'E |
3654 |
Locate site, measure tubulars, and trip drill string to mudline
|
|
0.4 |
|
|
|
Drill to 144 mbsf
|
|
0.2 |
|
||||
|
RCB from 144 mbsf to 194 mbsf in sediment
|
|
0.5 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
RCB from 194 mbsf to 294 mbsf (100 m into bsmt)
|
|
2.0 |
|
||||
|
Wiper trip and displace hole with mud
|
|
|
|
||||
|
Release bit w/MBR and set end of pipe at 80 mbsf
|
|
0.5 |
|
||||
|
Log hole with triple combo and FMS-sonic
|
|
|
0.8 | ||||
|
Recover drill string and secure drilling equipment
|
|
0.4 |
|
||||
| Subtotal days on site: |
4.8 |
||||||
| Transit 232 nmi from Site SRNH-2 to SRCH-5 @ 10.5 kt | 0.9 |
|
|
||||
| SRCH-5 | 36°06.944'N 158°27.526'E |
3148 |
Locate site and trip drill string to mudline
|
|
0.4 |
|
|
|
Drill to 134 mbsf
|
|
0.2 |
|
||||
|
RCB from 134 mbsf to 184 mbsf in sediment
|
|
0.4 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
RCB from 184 mbsf to 384 mbsf (200 m into basement)
|
|
4.0 |
|
||||
|
Wiper trip and displace hole with mud
|
|
|
|
||||
|
Release bit w/MBR and set end of pipe at 80 mbsf
|
|
0.6 |
|
||||
|
Log hole with triple combo and FMS-sonic
|
|
|
0.7 | ||||
|
Recover drill string and secure drilling equipment
|
|
0.4 |
|
||||
| Subtotal days on site: |
6.7 |
||||||
| Transit 112 nmi from SRCH-5 to SRSH-6 @ 10.5 kt | 0.4 |
|
|
||||
| SRSH-6 | 34°25.320'N 159°22.932'E |
3285 |
Locate site and trip drill string to mudline
|
|
0.4 |
|
|
|
Drill to 127 mbsf
|
|
0.2 |
|
||||
|
RCB from 127 mbsf to 177 mbsf in sediment
|
|
0.4 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
RCB from 177 mbsf to 277 mbsf (100 m into basement)
|
|
2.1 |
|
||||
|
Wiper trip and displace hole with mud
|
|
|
|
||||
|
Release bit w/MBR and set end of pipe at 80 mbsf
|
|
0.4 |
|
||||
|
Log hole with triple combo and FMS-sonic
|
|
|
0.7 | ||||
|
Recover drill string and secure drilling equipment
|
|
0.3 |
|
||||
| Subtotal days on site: |
4.5 |
||||||
| Transit 115 nmi from SRSH-6 to SRSH-3B @ 10.5 kt | 0.5 |
|
|
||||
| SRSH-3B | 32°30.474'N 159°14.082'E |
3477 |
Locate site and trip drill string to mudline
|
|
0.4 |
|
|
|
Drill to 119 mbsf into sediment
|
|
0.2 |
|
||||
|
RCB from 119 mbsf to 169 mbsf into sediment
|
|
0.4 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
RCB from 169 mbsf to 308 mbsf (139 m into basement)
|
|
2.7 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
Rig up/deploy Free Fall Funnel (FFF), inspect FFF w/VIT
|
|
|
|
||||
|
Round trip drill for bit change and reenter FFF
|
|
1.2 |
|
||||
|
RCB from 308 mbsf to 469 mbsf (161 m into basement)
|
|
3.7 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
Displace hole with logging mud, drop bit with MBR
|
|
|
|
||||
|
Set end of pipe at 80 mbsf
|
|
0.6 |
|
||||
|
Log hole with triple combo, FMS-sonic, and UBI
|
|
|
1.3 | ||||
|
Recover drill string and secure drilling equipment
|
|
0.4 |
|
||||
| Subtotal days on site: |
10.9 |
||||||
| Transit 145 nmi from SRSH-3B to SRSH-8 @ 10.5 kt | 0.6 |
|
|
||||
| SRSH-8 | 31°05.752'N 156°55.981'E |
4670 |
Locate site and trip drill string to mudline
|
|
0.4 |
|
|
|
Drill to 105 mbsf in sediment
|
|
0.2 |
|
||||
|
RCB from 105 mbsf to 155 mbsf in sediment
|
|
0.5 |
|
||||
|
Wiper trip and flush hole with mud
|
|
|
|
||||
|
RCB from 155 mbsf to 255 mbsf (100 m into basement)
|
|
2.1 |
|
||||
|
Wiper trip and displace hole with mud
|
|
|
|
||||
|
Release bit w/MBR and set end of pipe at 80 mbsf
|
|
0.5 |
|
||||
|
Log hole with triple combo and FMS-sonic
|
|
|
0.9 | ||||
|
Recover drill string and secure drilling equipment for transit
|
|
0.5 |
|
||||
| Subtotal days on site: |
5.1 |
||||||
| Transit 3129 nmi to Townsville, Australia @ 10.5 kt | 12.4 |
|
|
||||
| Townsville, Australia | 19.2 | 27.6 | 4.4 | ||||
| Subtotal time on site: |
32.0
|
||||||
| Contingency: |
4.8
|
||||||
| Total operating days: |
56.0
|
||||||
| Total expedition (including 5 port call days): |
61.0
|
||||||