Abstract

The Gasunie-Nuon Underground Gas Storage Consortium plans to drill and leach caverns in the Zuidwending salt dome in the Netherlands. According to safety regulations, gas storage caverns must be at least 150 m from the salt flank. The location of the Zuidwending salt flank, however, was not well known; its uncertainty based on surface seismic is some ±200 m (Figure 1). A more precise estimate of the salt-flank location was needed for the project to proceed.

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