Experimental Investigation of Gas Hydrate Formation Habit in Porous Media Using Permeability and Thermal Conductivity Measurements
Date
2013-03-19
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Abstract
The in-place volume of methane in gas hydrate deposits surpasses the recoverable conventional methane by at least two orders of magnitude. Many studies have been conducted to improve the forecast of gas production and this requires the inclusion of good property prediction methods for reliable feasibility investigation. A number of authors have speculated about the formation behaviour of the hydrate, either as coating the grains or filling the pores. This topic remains controversial as there is supporting evidence on both sides. In this current work, an experimental study was conducted by forming carbon dioxide hydrate using different initial water saturations in a sand-packed medium. The formation habit of gas hydrate in porous media is investigated by the approach of permeability comparisons and thermal conductivity responses. The ratio of pore surface area to pore volume responses estimated using Kozeny grain model based on the permeability at different hydrate saturations suggests that gas hydrate formation behaviour agrees to certain extend with the distribution of the water within the sand-pack. The responses of the thermal conductivity varied at different hydrate saturation shows the same trend as the partially water saturated sand pack system. Based on these outcomes, this study suggests that the formation habit of gas hydrate in porous media formed in system understudy is grain coating and formed according to the water distribution.
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Engineering--Petroleum
Citation
Sia, C. W. (2013). Experimental Investigation of Gas Hydrate Formation Habit in Porous Media Using Permeability and Thermal Conductivity Measurements (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/26062