Table T2. Specifications of pressure measurement and logging systems in CORKs related to Expedition 327 and associated experiments, as of the end of Expedition 327. (See table notes.)
|
Component
|
Hole 1026B
|
Hole 1027C
|
Hole U1301A
|
Hole U1301B
|
Hole U1362A
|
Hole U1362B
|
|---|---|---|---|---|---|---|
| CORK deployed | Expedition 301 (2004) | Leg 168 (1996) | Expedition 301 (2004) | Expedition 301 (2004) | Expedition 327 (2010) | Expedition 327 (2010) |
| Logger deployed | Alvin (2007) | Alvin (1999) | Alvin (2007) | Alvin (2007) | Expedition 327 (2010) | Expedition 327 (2010) |
| Pressure channels | 2 | 2 | 3 | 4 | 3 | 3 |
| Dedicated seafloor gauge | Yes | Yes | Yes | Yes | Yes | Yes |
| Basement intervals | 1 | 1 | 1 | 3 | 2 | 1 |
| Gauge serial numbers | 107549, 107550 | 62719, 62718 | 106844, 106855, 106856 | 107551, 107553, 107554, 107560 | 75738, 75739, 89098 | 94000, 94223, 93076 |
| Isolated cased interval | No | No | No* | No* | Yes (spot)† | Yes |
| Sample rate (s) | 1 s | 3600 | 60 | 60 | 60 | 60 |
| Memory (Mb) | 256 | 256 | 256 | 256 | 256 | 256 |
Notes: * = upper basement interval includes gap between 10¾ and 16 inch casing strings that is not sealed at the base. † = gauge currently being used for seafloor monitoring can be switched with wellhead valve to spot-check annular gap between 10¾ and 16 inch casing. Original Hole 1026B and 1027C CORKs were deployed during ODP Leg 168; Hole 1026B CORK was replaced during IODP Expedition 301. Logger deployments are most recent as of end of Expedition 327. Pressure gauges are identified by serial number from bottom to top, with seafloor at top where applicable. The old data logger in Hole 1027C CORK is not thought to be operating at present; a new logger is planned for deployment in summer 2011.
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