Near-wellbore (NWB) stimulation continues to evolve and change over time as a wide variety of tools and processes designed to target this problem area of the borehole are being developed. Fluidic oscillators (FOs) are amongst some of the most simple and successful tools to affect this region; however, even after decades of multidiscipline industry development, there is still room for improvement.
This paper discusses the search for the perfect oscillator design for NWB stimulation using solid modeling and 3D computational fluid dynamics (CFD). These tools allowed fast and efficient evaluation of hundreds of concepts to optimize features of the selected design without the need for prototype testing during each design iteration. As a result, many months of development time were saved by eliminating repeated manufacturing and testing activities. The best possible solution was then validated in the laboratory using rapid-prototype models, machined prototypes, and ultrahigh-speed photography.
The main purpose of this paper is to focus on the case histories collected during field testing and commercialization of the new design. Pre- and post-treatment production figures, infield well comparisons with competing technologies, and repeat treatments originally performed with previous versions best showcase the superior performance from the advances made to the tool and treatment process and are used whenever possible.
The results prove what laboratory testing predicted—the improvements translated to superior stimulation results.