Figure F1. A. Annular pressures measured at the bit during drilling, as a function of depth (referenced to the rig floor). The leak-off pressure measured by a leak-off test during Expedition 338 and hydrostatic and lithostatic pressures are shown for reference. Hydrostatic pressure was computed assuming a mean seawater and pore water density of 1.03 g/cm3. DOC = drilling out cement, RIH = run in hole, csg = casing. B. Annular pressures shown in terms of equivalent circulating density (ECD) as a function of depth. The nominal mud weights used during drilling are shown for reference (gray dashed lines). Mud losses occurred when the bit was at 4004 and 4083 m BRT.
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