Revolutionizing Well Interventions in Slim 3-7/8" Openhole, Global Firsts in High-Definition Spectroscopy and High-Pressure Abrasive Jetting Pin-Point Acid Stimulation Technologies on Real-Time Hybrid Fiber OpticsCoiled-Tubing Platform

North Kuwait Jurassic Gas asset produces from Jurassic deep sour gas condensate carbonate reservoirs. High depletion causes differential pressure drilling challenges across the main producing multilayer reservoir. Increasing number of new wells have to be completed as slim 3-7/8″ openhole in the main potential flow zones. Hence, intervention for formation evaluation logging and proper stimulation placement became challenging leading to inefficient stimulation that impacts the well production potential. This paper will demonstrate the design, execution challenges and successful results of revolutionary first global well intervention in such ultra-slim 3-7/8″ openhole wells, integrating high-Definition Spectroscopy for formation evaluation and AbrasiJET Pin-point acid stimulation technologies deployed on Real-time Hybrid Fiber Optics CoiledTubing (CT) platform. The Jurassic gas asset produces mainly from deep high temperature and initially high pressure tight complex heterogeneous carbonate reservoirs. Hence, well productivity potential significantly depends on formation evaluation logs and the effectiveness of subsequent selective stimulation treatments. As a result of pressure depletion, the main producing reservoir experiences high differential pressure among its multilayers specially the bottommost major potential flow-zone where it becomes very challenging to land with same 6″ openhole section as standard drilling design. Alternatively drilling 3-7/8″ deepening slim barefoot is unavoidable despite utilizing Managed-Pressure Drilling system. This challenge has implied significant limitation to running formation evaluation logs and efficient selective stimulation of the 3-7/8″ slim openhole section due to limitation on conventional Coiled-tubing intervention capabilities. To overcome such intervention challenges, the integrated asset's field development and operation teams has conducted technical feasibility and intervention risk management study on running High-Definition Spectroscopy logging for formation evaluation and High-Pressure Abrasive Jetting Tool (HPAJT)pin-point stimulation deployed on Real-time Hybrid Fiber Optics CT platform in ultra-slim 3-7/8″ openhole. This revolutionary integrated intervention technique has been implemented successfully as the first global deployment in two Jurassic gas wells late 2024. The success of acquiring formation evaluation logs has highly improved stimulation design through better distribution and efficiency across the openhole targeting low perm intervals from Logs, for the subsequent efficient pin-point stimulation placement. The initial production tests from both wells showed outstanding results. The first well was treated with 27 pin-point stimulation stations and achieved 50% additional production gain exceeding the production forecast. The second well had initially been acid stimulated with bull-heading techniques where it could not be activated, however initial production exceeded its production forecast post executing the pin-point acid stimulation. This groundbreaking Technology combination and success sets a new benchmark for well intervention and establishing another unparalleled standard in Jurassic ultra-deep well intervention operations. This success opens new opportunities to conduct similar treatments in analog cases to maximize production potential of such slim openhole wells.