Comparison of Two Low-Permeability Horizontal Devonian Projects in the Permian Basin with Competing Completion Techniques

摘要

Detailed production data from 32 horizontal Devonian wells inthe Permian Basin was studied to determine if the impact ofvarious completion methods might be distinguished from anexisting reservoir overprint. Flowing transient pressureanalysis was utilized to determine effective permeabilities,contributing lateral lengths, and respective drainage radii.Production and economic performance on each well werenormalized for permeability, productive zone height, porosity,and initial static reservoir pressure, so that examinations intovarious completion processes would be more meaningful.Multiple physical parameters and controllable processvariables were then plotted versus normalized netpresent value.A fully coupled three-dimensional reservoir and wellboresimulator was employed to match historical results andextrapolate conclusions beyond the narrow confines of thetwo projects.Some wells in the study were completed with cementedliners, and others completed with pre-drilled uncementedliners. A direct comparison is made between the twocompletion styles.