Abstract: Xinjiang H gas storage is affected by the strong injection and production operation mode of gas storage, and the risk of sand production is prone to occur in the reservoir during peak shaving and gas production. Once sand is produced, it will seriously affect the life and peak shaving capacity of the gas storage, and there is an urgent need for studies on sand production in the gas storage. It is difficult for regular research to ensure the capacity of gas storage for peak shaving and supply, and monitor sand production during the conventional experiment. In view of this, this paper proposes a new experimental method, that is, on the basis of the conventional sand displacement experiment, the pore size distribution and pore throat distribution before and after the core experiment are measured by the nuclear magnetic resonance instrument. This method solves the problem that the amount of sand produced is too small and difficult to monitor in the process of conventional sand production experiments, and explores the sand production law of formation more comprehensively from a microscopic point of view. Using this method, the influence of five factors such as flow velocity, production pressure difference, permeability, water content, and formation pressure drop on formation sand production is analyzed. The experimental results show that: 1) the higher the flow velocity, the core permeability and sand production volume; both increase first, then decrease, and finally remain unchanged; 2) the critical flow rate of H gas storage is 4.14 L/min, and the critical production pressure difference is 5 MPa; 3) the water cut and the formation pressure drop are affected by the pore size distribution, and are the main factors affecting sand production in H gas storage formation; 4) when H gas storage has no water production in the early stage, proper sand production will increase the permeability of the formation and increase the gas injection and production capacity of the gas well.

Key words: gas storage, nuclear magnetic resonance apparatus, pore size distribution, pore throat distribution, sand production experiment