Page 26 - Reservoir Geomechanics

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SEAFLOOR
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Depth (feet below sea level) 6000

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12000

14000
0.5 1 1.5 2 2.5 3 3.5
Density (g/cm)
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SEAFLOOR
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Depth (feet below sea level) 6000

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14000
0 2000 4000 6000 8000 10000 12000 14000
Overburden Stress (psi)

0
SEAFLOOR
2000

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Depth (feet below sea level) 6000

8000

10000
12000

14000
0 0.5 1 1.5
Overburden Stress (psi/ft)
Figure 1.3. Illustration of how integration of density logs (upper figure) can be used to estimate
overburden stress at depth (center figure) or overburden stress gradient (lower figure). Variability of
the density logs, as well as the fact that they are often not obtained over the total depth of interest,
leads to uncertainty in the calculated overburden (see text).