Novel Abrasive Perforating with Acid Soluble Material and Subsequent Coil Tubing Jetting Assisted Stimulation Provides Outstanding Results in Carbonate Gas Well

Abstract

Abstract Abrasive perforating with coiled tubing (CT) is a technique that has been in the market for several decades and that has been proven as a very valuable alternative to conventional perforating with e-line. The application is even more valuable whenever a high rate or fracture stimulation treatment is to follow due to the significant reduction in tortuosity and pumping friction losses across perforations. One of the main drawbacks of this type of perforations is that it is a much lengthier process compared to conventional perforating, and it requires a large amount of fluids as well as additional CT runs in the well to complete. These drawbacks discourage the wide use of the technique for more conventional applications. This paper discusses a novel approach to abrasive perforating with the first ever use of an acid soluble abrasive material and ending with coil tubing jetting assisted nitrified stimulation. The main advantage of the use of this abrasive material is that there is no need for additional clean out runs and changeover of tools, thereby significantly reducing operational time and fluid volumes. Just as well, the benefits of combining the enhanced connectivity to the reservoir and the coil tubing jetting assisted stimulation were reflected in outstanding gas production results, which exceeded all expectations. Finally, as an added benefit, given the nature of the focused stimulation, this type of treatment in specific cases can replace plug-and-perf or multistage fracturing completions, thereby eliminating operational risks and added completion costs.