Blueprint for Tight Carbonate Reservoirs Productivity Enhancement: A Comprehensive Analysis of Advanced Stimulation Techniques

Abstract Developing tight carbonate reservoirs presents significant challenges, particularly regarding the decline in sustainable oil production rates and inadequate pressure maintenance resulting from low permeability and transmissibility. The adoption of advanced stimulation techniques is essential for improving productivity; otherwise, well down spacing becomes necessary to meet mandated production targets. Advanced stimulation methods are generally more cost-effective and can increase overall reservoir recovery. However, an in-depth review of all advanced stimulation options is necessary to ensure effective integration into field development strategies. Tight carbonate reservoirs typically exhibit very low permeability (less than 1 millidarcy) and limited vertical communication between sublayers (Kv/Kh < 0.5). Stimulation is crucial to maintain both production and injection rates, as conventional methods often lead to only short-term improvements without sustained production gains. To address these limitations, new advanced stimulation technologies have been deployed, aiming to maximize reservoir contact, develop deep wormholes, bypass near-wellbore damage, enhance vertical communication, and connect natural fractures within the reservoir. A comprehensive analysis was carried out to benchmark these technologies for potential field-wide implementation. In Field A, at Reservoir R technical pilots involving advanced stimulation methods—such as fishbone stimulation, hydraulic fracturing, limited entry liners, and abrasive jetting—were conducted. Each technique addresses specific aspects of productivity enhancement but also has unique application constraints, varying effectiveness, and associated costs. Overall, these technologies resulted in production rate improvements ranging from 100% to 300%, with sustained output and injection rates over periods exceeding six months. Nevertheless, a holistic evaluation is required to facilitate their full-field deployment and to inform future development phases within the same reservoir. This paper examines the limitations, advantages, capital expenditures, and unit technical cost comparisons of each technology using a standardized benchmarking matrix. It also identifies opportunities for improvement and cost optimization for extended pilot programs and broader deployment. Ultimately, this work provides a comprehensive review of advanced stimulation techniques, focusing on production sustainability, technical challenges, and key insights relevant to their incorporation into field development strategies.