Logging was attempted in Hole 1122C but was unsuccessful because of adverse weather and poor hole conditions. We planned to run one pass of the triple combination, two passes of the FMS-sonic, and then a single pass of the GHMT (for abbreviations and explanation of the tool strings see "Downhole Measurements" in the "Explanatory Notes" chapter). Logging operations began at 0700 hr on 11 September 1998 and were terminated at 1330 hr on the same day.
After coring the hole to 627.4 mbsf, the BHA was raised to 83.12 mbsf, in preparation for logging. Raising the BHA was, however, problematic, and resulted in substantial infilling at the base of the hole (see "Operations"). The heave on the ship (>6 m) was too great to allow use of the wireline heave compensator (WHC). Because of this, it was decided not to open the calipers on the FMS and lithodensity tools, in case the excessive heave ripped them off.
The triple combination was lowered to the base of the pipe, but could not pass completely into the open hole because of an obstruction at 95 mbsf, ~12 m below the BHA. Weather at the time was poor, with 3.5-m seas, 6-m swells, and 37-kt winds. After trying unsuccessfully for 35 min to break through the obstruction, the triple combination was pulled back into the drill string. An attempt was made to pull up the BHA, but it had become stuck. At this point the triple combination was brought back up to the rig floor and disassembled.
A revised logging plan was considered, consisting of a wiper trip with the drill string to clean out the hole, followed by a single pass of a shorter tool string. The new tool string would consist of the gamma-ray, sonic, resistivity, and temperature tools. If this pass had been successful, a run of the GHMT would have followed. However, by this time weather conditions had deteriorated with the swells increasing to a maximum of 10 m and the winds to 45 kt. The forecast was for deteriorating weather. These conditions constituted a danger to the drill string and a risk to the tools. Therefore, it was decided to abandon logging operations at Hole 1122C. It took a further 2 hr to free the BHA from the hole.