Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT)
Jones, Keith W.
Winters, William J.
MetadataShow full item record
The hydrate–sediment interaction is an important aspect of gas hydrate studies that needs further examination. We describe here the applicability of the computed microtomography (CMT) technique that utilizes an intense X-ray synchrotron source to characterize sediment samples, two at various depths from the Blake Ridge area (a well-known hydrate-prone region) and one from Georges Bank, that once contained methane trapped as hydrates. Detailed results of the tomographic analysis performed on the deepest sample (667 m) from Blake Ridge are presented as 2-D and 3-D images which show several mineral constituents, the internal grain/pore microstructure, and, following segmentation into pore and grain space, a visualization of the connecting pathways through the pore-space of the sediment. Various parameters obtained from the analysis of the CMT data are presented for all three sediment samples. The micro-scale porosity values showed decreasing trend with increasing depth for all three samples that is consistent with the previously reported bulk porosity data. The 3-D morphology, pore-space pathways, porosity, and permeability values are also reported for all three samples. The application of CMT is now being expanded to the laboratory-formed samples of hydrate in sediments as well as field samples of methane hydrate bearing sediments.
This paper is not subject to U.S. copyright. The definitive version was published in Journal of Petroleum Science and Engineering 56 (2007): 136-145, doi:10.1016/j.petrol.2006.03.029.
Suggested CitationJournal of Petroleum Science and Engineering 56 (2007): 136-145
Showing items related by title, author, creator and subject.
Winters, William J.; Waite, William F.; Mason, D. H.; Gilbert, L. Y.; Pecher, Ingo A. (2006-04-08)To improve our understanding of the interaction of methane gas hydrate with host sediment, we studied: (1) the effects of gas hydrate and ice on acoustic velocity in different sediment types, (2) effect of different ...
Pohlman, John W.; Bauer, James E.; Canuel, Elizabeth A.; Grabowski, Kenneth S.; Knies, D. L.; Mitchell, C. S.; Whiticar, M. J.; Coffin, Richard B. (2009-06-16)Fossil methane from the large and dynamic marine gas hydrate reservoir has the potential to influence oceanic and atmospheric carbon pools. However, natural radiocarbon (14C) measurements of gas hydrate methane have been ...
Xenon hydrate as an analog of methane hydrate in geologic systems out of thermodynamic equilibrium Fu, Xiaojing; Waite, William F.; Cueto‐Felgueroso, Luis; Juanes, Ruben (American Geophysical Union, 2019-05-06)Methane hydrate occurs naturally under pressure and temperature conditions that are not straightforward to replicate experimentally. Xenon has emerged as an attractive laboratory alternative to methane for studying hydrate ...