Contact Sensitivity to Cutoffs and Petrophysical Assumptions: A Reproducible Method to Stress-Test STOIIP in Marginal Fields
In marginal fields, STOIIP (Stock Tank Oil Initially In Place) uncertainty often concentrates around two linked issues: where the hydrocarbon contact sits and how pay is defined through cutoffs and petrophysical assumptions. Small shifts in water saturation cutoff, net-to-gross criteria, or assumed contact depth can...