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d formation pressures of 12, ottom temperature is 17 °C.

d formation pressures of 12, ottom temperature is 17 °C.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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3. Overpressure is commonly encountered when drilling in the Caspian Sea. Log measurements from a nearby well indicate that the average sediment density changes from 2.18 gm/cc to 2.35 g/cc at a depth of 8000 ft below mud line. Log measurements also indicate that the thermal gradient is 1.80 °F/100 ft. The nearby well suffered a blowout and recorded formation pressures of 12,000 psi. The water depth at your location is 400 ft and bottom temperature is 17 °C. Your target depth is 15,000 ft. Calculate the overburden, pore and effective pressures and temperature you would expect. Calculate the required safe mud weight (Ibs/gal) to prevent a blowout.
Transcribed Image Text:3. Overpressure is commonly encountered when drilling in the Caspian Sea. Log measurements from a nearby well indicate that the average sediment density changes from 2.18 gm/cc to 2.35 g/cc at a depth of 8000 ft below mud line. Log measurements also indicate that the thermal gradient is 1.80 °F/100 ft. The nearby well suffered a blowout and recorded formation pressures of 12,000 psi. The water depth at your location is 400 ft and bottom temperature is 17 °C. Your target depth is 15,000 ft. Calculate the overburden, pore and effective pressures and temperature you would expect. Calculate the required safe mud weight (Ibs/gal) to prevent a blowout.
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