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reservoir geomecanics

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352 Reservoir geomechanics<br />

All Planes<br />

ALL PLANES<br />

Permeability (md)<br />

0.001<br />

0.01<br />

0.1<br />

1<br />

10<br />

100 1000 10 4<br />

M1<br />

Siliceous<br />

Shale Mbr.<br />

DST 8<br />

M3<br />

Up. Calcareous<br />

Siliceous Mbr.<br />

Monterey Fm.<br />

Chert Member<br />

Phosphatic<br />

Member<br />

Basal Calcareous<br />

Member (1)<br />

Basal Tuff<br />

Basal Calcareous<br />

Member (2)<br />

DST 5<br />

DST 4<br />

DST 7<br />

DST 6<br />

DST 3<br />

DST 2<br />

Depth (meters)<br />

Figure 11.6. Permeability measurements from drill stem tests in well A (Figures 5.8 and 11.5).<br />

Note that the presence of critically stressed faults results in significant permeability increases<br />

(matrix permeability is negligible) except for the case of DST 8, where the silica is in the form of<br />

Opal A. From Finkbeiner, Barton et al. (1997). AAPG C○ 1997 reprinted by permission of the AAPG<br />

whose permission is required for futher use.

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