Jidong Nanpu No.1 gas storage is the first underground gas storage (UGS) reconstructed from the offshore depleted reservoir in China. The production condition of high-intensity alternating injection and production plays a great role in promoting sand production of its unconsolidated sandstone reservoir. To fully understand the sand production law of unconsolidated sandstone UGS and improve the sand control and completion effect, this paper summarizes the comprehensive analysis method of logging data and empirical model and the prediction method of critical sand production bottom hole pressure, strengthens the identification of the potential risk of sand production of gas storage, and obtains the sand emergence law under alternating load through the high temperature and high-pressure test device. It also provides the experimental basis for optimizing the sand control completion method. The results show that the strength of unconsolidated rock is low, the skeleton damage is easy to occur, and the sand production is mainly fine silt. When there is support inside the hole, the core plasticity becomes stronger. Therefore, the wall support should be improved to alleviate the sand production problem. When the production pressure difference does not reach the critical value, the gas flow has little influence on sand production, and the increase of gas flow beyond the critical point will promote sand production in the hole. The sand control process of the pre-packed gravel winding screen is selected to enhance sand retention and anti-clogging performance, which has little influence on productivity. Through the discussion and research of the sand production prediction method and sand production rule experiment, this paper formulated reasonable production pressure difference to control formation sand production, effectively guided the design and optimization of sand control completion mode of injection and production Wells, and ensured the safe and stable operation of UGS.