Gas Production from Hydrate Bearing Sediments: Geomechanical Implications
byJ. Carlos Santamarina And Jaewon Jang
Santamarina, J. C. and Jang, J. (2009). "Gas Production from Hydrate Bearing Sediments: Geomechanical Implications." DOE Fire in the Ice, Vol. December
The gas hydrates resource pyramid (FITI, Fall 2006) identifies coarse- grained lithologies like sands as the most economically favorable hydrate bearing sediments for future gas production. Yet, the largest fraction of total gas hydrate resources resides in fine-grained sediments at relatively low saturations, and producing substantial gas from such deposits has long been considered prohibitively costly and technically difficult. Using a combined experimental and numerical approach, the gas hydrates research team at Georgia Tech has investigated phenomena that may affect gas production from sand-hosted hydrates and studied factors that may augment the prospects for gas production from hydrates in fine-grained sediments. This article summarizes the interplay between sediment geomechanics and gas production from hydrate-bearing sediments, with particular focus on fine-grained sediments.