This paper reviews applications of hydrajet perforating during the past 6+ years specifically as they apply to horizontal and highly deviated completions for both oil and gas reservoirs. Many benefits to hydraulic fracturing through hydrajetted perfs instead of shape charge perforations will often exist. Also, a key feature to more economic applications has been coupling this process with a method that includes multi-stage fracturing operations. This feature can shorten the completion time needed to achieve multistage frac treatments. During this decade, horizontal wells that need fracture stimulation are being drilled deeper and, especially, with longer lateral sections requiring larger numbers of fracturing stages. This has increasingly challenged the limits of conventional jetting systems and methods, while requiring higher pressure limits for the wellhead, treatment tubing, and pumping equipment.

Three primary methods for using hydrajet perforating have been part of the surge of horizontal well applications. Listed in the order of their emergence of significant application during the present decade, they are: hydrajet fracturing (HJF), hydrajet perforating, annulus path fracturing (HPAP), and standalone use of hydrajetted perforating (SHJP) followed by conventional wellbore stimulation and isolation applications.

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