Figure F3. Annular pressure while drilling (APWD), annular pressure in excess of hydrostatic (APWD*), and equivalent circulating density referenced to the seafloor (ECDrsf) in Hole U1323A. The ECDrsf and APWD* curves decrease and increase, respectively, over the upper 150 mbsf. At 198 mbsf a 3 m thick sand layer recorded an increase in APWD* of ~1 MPa over the background drilling pressure. A 10.5 ppg mud was used for drilling below this point. GR = gamma radiation, SF = seafloor.
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