Completion optimization continues to be a priority for many operators. The process of adding diverter to hydraulic fracturing treatments remains one of the fastest growing techniques to gain operational efficiency while maintaining the desired reservoir contact during the treatment. Case studies in this paper are utilized to illustrate the effects of diversion on the overall completion program.

Evaluating diversion effectiveness and relating it back to overall completion effectiveness remains a challenge with surface pressure data alone. Diagnostics in the form of proppant tracing are applied to evaluate the near-wellbore coverage of the stage with the use of diversion. These stages are also evaluated based on the shift in treatment as a result of the diversion. Unique proppant tracers are utilized before and after diverter drops to evaluate changes in the treatment over time.

The results of diversion based on the overall stage coverage and the role that the diverter played in obtaining this coverage is presented in several case studies. Examples include data from projects that utilize different types of diverting techniques. The overall completion effectiveness based on missed clusters is illustrated in the case studies presented in this paper. Diversion cleanup and fracture interference while using diversion is evaluated using chemical tracers. Diversion will be discussed in an interwell communication case history.

In addition to the evaluation of diversion, baseline examples are included without diverter material. These baseline examples are sometimes referred to as "ghost stages." The diagnostic approach to this compilation of case histories compares the results of over 20 wells using completion diagnostics. All of the stages evaluated are summarized for perforation efficiency and diversion effectiveness.

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