Abstract: Water curtain system,as an important part of underground water-sealed oil storage cavern,directly affects the effect of water seal. As water curtain system is difficult to construct with long duration and large work load,there’s no consensus yet on the necessity of water curtain. According to experiences of underground water-sealed oil storage cavern in China and abroad,we expounded the necessity of water curtain system by using ABAQUS calculation software in consideration of the hydrological and engineering geological condition of an oil cavern under construction. This research provides support for the decision-making of planning and construction of underground water-sealed oil storage cavern.

Key words: underground water-sealed cavern, water curtain system, seal effect, cone of depression