Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT)

Jones, K. W.; Feng, H.; Tomov, S.; Winters, W. J.; Prodanovic, M.; Mahajan, D.

Abstract:

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.

Genre:

Article

ProdID:

70031835

Citation Author:

Jones, K. W.; Feng, H.; Tomov, S.; Winters, W. J.; Prodanovic, M.; Mahajan, D.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

145

Citation Issue:

1-3

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

Journal of Petroleum Science and Engineering

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

Citation Projection:

Citation Public Comments:

Citation Publisher:

Citation Series:

Citation Series Code:

Citation Series Number:

Citation Search Results Text:

Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT); 2007; Article; Journal; Journal of Petroleum Science and Engineering; Jones, K. W.; Feng, H.; Tomov, S.; Winters, W. J.; Prodanovic, M.; Mahajan, D.