Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
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Brittleness: Composition<br />
Composition: There is anecdotal evidence that (1) silica<br />
(siltiness) and (2) calcite content increase brittleness. One<br />
index that is sometimes quoted:<br />
€<br />
B ( % ) =<br />
An intuitive extension to calcite:<br />
€<br />
B ( % ) =<br />
Q<br />
Q + Carbon + Clay<br />
Q + Calcite<br />
Q + Calcite + Carbon + Clay<br />
60<br />
Gary Mavko – <strong>Stanford</strong> <strong>Rock</strong> <strong>Physics</strong> Laboratory