Effective stress on individual grains
Input(s)
S: Normal Stress (psi)
\(P_{p}\): Pore Pressure (psi)
Output(s)
\[
\sigma_{g}: \quad \text { Effective Stress (psi) }
\]
Formula(s)
\[
\sigma_{\mathrm{g}}=\mathrm{S}-\mathrm{P}_{\mathrm{p}}
\]
Reference(s)
Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 87.