Case-Hole Lithology and Density Measurements Part I: Applications in Permian Basin Reservoir Analyses

摘要

Often, traditional cased-reservoir analyses are not comprehensive enough to be applicable to the mixed lithologies common to Permian Basin reservoirs. The accuracy of the two cased-hole saturation measurements (SIGMA and Carbon/Oxygen logging) requires a porosity that is corrected for lithology effects. The saturation calculations also require inputs for the effects of the rock matrix. Along with correction and correlation of logging measurements, the lithology determination can be important in identifying reservoir characteristics, such as sand or anhydrite content, that are often linked to producibility or permeability.