Figure F3. A. Pressure as a function of depth for 26 inch riserless hole. All pressures are referenced to seafloor, as discussed in text. B. Equivalent circulating density (ECD) computed from APWD measurements. Black symbols = APWD measured by MWD, black line = static column pressure for 1.04 g/cm3 mud weight, dashed line = static column pressure for 1.20 g/cm3 mud weight, red line = lithostatic pressure, gray shaded region = depth of 36 inch surface casing. Note that pressures (and ECD) decrease when pipe connections are made.
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