By Nancy Zakhour, Matt Jones, Yu Zhao, Kate Orsini and Vinay Sahni HOUSTON-A research project at the Hydraulic Fracturing Test Site-2 (HFTS-2) in the Delaware Basin tested various completion schemes. The wells were instrumented with permanent fiber optic (FO) cable, and unique near-wellbore and far-field region surveys were acquired to evaluate spatial and temporal hydraulic fracture characteristics. State-of-the-art diagnostics included substantial monitoring of both the well stimulation and longer-term production performance. Evaluating and improving stimulation distribution effectiveness (SDE) for different completion designs based on the diagnostics results was the core objective. A hydraulic fracturing profile (i.e., proppant/fluid allocation among clusters) was obtained using near-wellbore distributed acoustic sensing (DAS) data acquired during stimulation. Statistical analysis provided a quantitative assessment of SDE for the different completion designs. A novel workflow assessed time-lapse fracture property changes at the cluster and stage levels based on distributed strain sensing (DSS) data acquired during the production phase. These time-lapse fracture property changes were compared with the frac profile. Based on the statistical analysis, the results of the study indicate that rate per cluster (RPC) during proppant slurry placement appears to be a primary completion design variable, rather than the typical rate per perf (RPP). If RPC was not maintained at a certain level, the likelihood of uneven distribution increased dramatically. The stage configurations that created low RPC while maintaining high RPP did not show improved SDE. MAY 2022 49