Total sum of formation units within a given bedding with porosity above the porosity cut-off:
h_{\rm eff} = \sum_k h_k |_{\phi_k > \phi_0} |
Total sum of formation units within a given bedding with porosity above the porosity cut-off:
h_{\rm eff} = \sum_k h_k |_{\phi_k > \phi_0} |