Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications



Abstract 056
Visual Observation of Gas Hydrate Formation and Dissociation in Synthetic Porous Media by Means of Glass Micromodels
Tohidi, B., Anderson, R., Clennell, B., Burgass, R.W., and Biderkab, A.-B.
Geology, 29(9), 867-�870 (2001).
Visual observation of gas hydrates at the microscopic scale in synthetic porous media provides unequivocal visual evidence that clathrates can form in systems without the presence of a free-gas phase. Hydrates were formed from a soluble liquid hydrate former (tetrahyrofuran, C4H8O), from free gas (CH4), and from dissolved gas (CO2). Clathrates were found to form within the center of pore spaces, rather than on grain surfaces. "Cementation" of grains only occurred in regions of a small grain size, or where a large proportion of pore space was filled with hydrate. However, even at high clathrate saturations, a thin film of free water persisted on grain surfaces. The results have important implications for the potential cementing effect of hydrates on sediments, and thus for sediment permeability, slope stability, and seismic interpretation of hydrate bearing sediments.

Reprints of this article are available in Adobe Portable Document Format (.pdf). You may request a reprint by submitting an email to the webmaster with the abstract number in the subject line. To read pdf files, you will require Adobe Acrobat Reader, which can be downloaded for free at the Acrobat Reader Download Page

Submit requests to: ross.anderson@pet.hw.ac.uk