Transforming Sand Control: A Sand-Surface-Selective Chemical System for Prevention and Remediation

Abstract Excessive sand production presents a significant operational challenge worldwide, compromising production facility integrity, reducing efficiency, and incurring costly non-productive time. This study introduces a novel sand control system that binds specifically to sand surfaces upon contact with connate water, effectively crosslinking sand particles. Leveraging its sand-surface-selective mechanism, the system requires minimal dosage and consistently achieves retained permeability. The performance of the new chemical treatment was evaluated using the sand loss method among other techniques. The two-component system was applied to a sand pack, cured under controlled temperature and time conditions, and flushed with brine. Sand loss was quantified by weighing the filtered and dried unconsolidated sand recovered from the brine flush. Retained permeability was assessed through a two-phase core flood experiment by comparing permeability values before and after the treatment. Laboratory tests demonstrated the efficacy of this novel two-component system as a sand control solution. Sand loss tests revealed a significant reduction (90%) after treatment at various temperatures. These results highlight the system's ability to effectively manage sand production without compromising well productivity. Moreover, the system showed high stability in acidic environments, making it suitable for post-acidizing operations. This study underscores the advanced capabilities of the proposed technology which operates independently of temperature activation, allowing for broader application across diverse reservoir conditions. Its chemistry targets sand grain surfaces, ensuring effectiveness at low dosages that prevent adverse permeability reduction. Additionally, its tolerance to variations in concentration and composition provides operational robustness, minimizing risks during field implementation.