The history of successful reentries in Hole 395A indicates that Leg 174B can expect to find the
hole in good condition, open to a depth of slightly more than 600 m. If the hole depth proves to be
less than 600 m, the CORK thermistor string can be shortened appropriately. In the unlikely
possibility that the hole proves completely unsuitable for logging or the CORK experiment, any
available time would be devoted to a contingency program in the sediments surrounding the hole.
Like the primary Leg 174B program, this contingency program would focus on hydrogeological
objectives, using an advanced hydraulic piston core (APC)/XCB BHA at selected locations within
the sediment pond. The emphasis would be on obtaining detailed profiles of temperatures and fluid
compositions down to basement at selected locations in the sediment, using multiple runs of
temperature tools (Adara shoe and/or Davis-Villinger Temperature Probe [DVTP] and the
downhole water sampler, temperature, and pressure probe [WSTP]).
To 174B References
To 174B Table of Contents