Abstract: Aiming at cyclic injection production (CIP) operations of underground gas storages within sand prone unconsolidated sandstone reservoirs, this study proposes and evaluates a combined sand control technique integrating a mechanical screen with annular coated sand packing. Laboratory experiments were carried out on this screen coated sand composite system under both fully compacted and incompletely compacted packing configurations to assess its CIP cycle adaptability and determine the optimal packing scheme. The failure mechanisms of the coated sand layer, formation sand invasion, pore blocking behaviour and dynamic evolution characteristics of permeability were systematically investigated. Results indicate that the composite system satisfies the requirements on structural stability, sand retention capacity and permeability performance under CIP conditions. No sand breakthrough occurs under fully compacted packing conditions. Sand production emerges in incompletely compacted test groups at the initial stage; nevertheless, both the mass and grain size of produced sand decrease with ongoing cycles until pore blocking equilibrium is attained and sand outflow terminates, satisfying on site sand control criteria. Invasion of reservoir sand triggers internal clogging. Recurrent clogging unclogging takes place at injection production transitions, which contributes to progressive permeability loss in successive cycles. In the reference experiment with 95% packing efficiency, the permeability of the coated sand pack dropped by around 25.9% after five CIP cycles. Accordingly, improving the packing density and consolidation strength of the outer annulus coated sand layer serves as the primary approach to guarantee structural stability, long term sand retention performance and sustained flow conductivity.