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Fracture threshold in the real world (view source)
Revision as of 20:23, 20 March 2014
, 20:23, 20 March 2014→Stress and poisson's ratio variation
==Stress and poisson's ratio variation==
==Stress and poisson's ratio variation==
Although the variables used to calculate the fracture pressure commonly are generalized as a smooth curve, there are local variations and departures from this generalized curve. The principal horizontal stress, ε<sub>3</sub>* and Poisson's ratio depend on lithology and bed geometry as well as depth and compaction.<ref name=ch10r52 />
Although the variables used to calculate the fracture pressure commonly are generalized as a smooth curve, there are local variations and departures from this generalized curve. The principal horizontal stress, ε<sub>3</sub>* and [http://en.wikipedia.org/wiki/Poisson%27s_ratio%20Poisson's%20ratio Poisson's ratio] depend on lithology and bed geometry as well as depth and compaction.<ref name=ch10r52 />
==Pore pressure variations==
==Pore pressure variations==