“…Surface and borehole geophysical data, such as seismic surveys, enable characterization over a larger spatial area; these approaches have been successfully used in conjunction with borehole data ,− and in the absence of borehole data. , The need for detailed subsurface characterization is greater in cases when production tests are planned, with reservoir characteristics and gas hydrate occurrence characteristics both needed for realistic modeling and planning. Accurate physical property estimates are critical for numerical modeling, which provides an essential tool for the planning and design of gas hydrate production tests. , As noted by Lee and Collett, many geophysical properties provide options for estimating gas hydrate saturation ( S gh ), but some of these estimates depend on the form that gas hydrate takes in the pore space (e.g., V P , V S , and electrical resistivity), whereas others relate more directly to the total amount of gas hydrate present (e.g., nuclear magnetic resonance, NMR).…”