Screen Permeability Optimization for Enhanced Sand Retention in Well Completion
摘要
Among various sand control methods, mechanical sand screens have demonstrated superior efficacy for mitigating sand production in unconsolidated formations. However, the performance of these screens is highly dependent on their compatibility with the formation’s sand properties. Incompatibility between screen specifications and reservoir conditions can result in suboptimal sand retention, increased plugging potential, and reduced well productivity. This underscores the necessity of rigorous analysis to select the most appropriate screen configuration for specific reservoir conditions. In this study, the performance of wire-wrapped screens was systematically evaluated using the Sand Retention Test (SRT) method. A particle size distribution (PSD) analysis was conducted to characterize the sand formation. Wire-wrapped screens with slot opening sizes ranging from 125 to 175 microns were tested under controlled conditions to assess their permeability, plugging effects, and sand retention efficiency. Experimental results indicated that the 125-micron screen achieved the highest flow rate for well-sorted sand with highest permeability at confining pressure of 200, 600 and 100 psi. The retained permeability increased as the screen size increase. This demonstrates that screen performance is significantly influenced by the sand particle size distribution and screen slot dimensions.