Beyond Acid: Energized Single Phase Retarded Stimulation with Degradable Particulate Diverter Enhances Productivity in North Kuwait Jurassic Gas Reservoirs

Abstract The Sabriya field was initially discovered in the 1950s for shallower cretaceous oil reservoirs, but with deeper Jurassic potential only fully recognized decades later with substantial reserves with estimates of roughly 200 million barrels of recoverable oil with a sizeable gas cap. Because of the deep tight nature of Middle Marrat stimulation the initial wells underwent conventional matrix acidizing treatments alone in a > 280F formation led to rapid acid spending and only shallow wormhole penetration covering only near wellbore (NWB) restricting production to primary porosity with pressure depletion being the main production mechanism this type of treatment yielding limited improvement. To address this, A novel Far Field Acoustic Imaging combined with Energized Single phase retarded stimulation treatment and degradable particulate diverter was introduced resulting in markedly higher post-stimulation productivity. Results are also compared to previously conventional acid stimulation treatment. This Intelligent Stimulation workflow enhances stimulation treatment design and delivery options incorporating a 3D Far Field Acoustic Imaging, a customizable high rate Energized Single Phase Retarded Stimulation along with degradable particulate diverter sequence to address depleted carbonate reservoir stimulation challenges including: high temperature formation treatment, low treatment fluid efficiency, presence of high risk geological features such as faults, high permeability thief zones, and reservoir heterogeny to maximize recovery through data integration for informed treatment design, execution and evaluation. From the Geosteering Report and image log, a major fault was detected with a 7ft down thrown shift in pay zone. Acoustic imaging revealed additional compliant fracture networks extending into the far field around the fault. The treatment design dosage and diversion sequence were optimized using reservoir centric matrix stimulation simulation model to ensure diversion to reduce leak-off to the fault and further isolate other fractures to ensure uniform stimulation of the long perforation interval. The utilization of nitrified single phase retarded acid along with ultra-low temperature degradable particulate diverter was essential for the overall stimulation enhancement for such depleted reservoir achieving 2 times the original production forecast. This paper introduces a novel reservoir centric integrated stimulation workflow combining reservoir characterization, and advanced stimulation chemistry with proprietary. It demonstrates a scalable approach for revitalizing high-temperature, pressure-depleted carbonate reservoirs in mature fields, offering practical insights for brown fields.