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http://dx.doi.org/10.4217/OPR.2021.43.4.295

Productivity Analysis for Multi-Wells Depressurization of Gas Hydrate Bearing Sediments in Ulleung Basin, East Sea of Korea  

Moon, Seo-Yoon (EIP Asset Management Co., Ltd.)
Shin, Hyo-Jin (Department of Energy and Resources Engineering, College of Ocean Science and Technology, Korea Maritime and Ocean University)
Lim, Jong-Se (Department of Energy and Resources Engineering, College of Ocean Science and Technology, Korea Maritime and Ocean University)
Publication Information
Ocean and Polar Research / v.43, no.4, 2021 , pp. 295-306 More about this Journal
Abstract
A field scale productivity analysis is required for the development of gas hydrate in marine sedimentary layers to verify the field applicability of production techniques and to improve productivity. In this study, the productivity resulting from the application of depressurization using multi-wells for the development of gas hydrate in the Ulleung Basin, East Sea of Korea, was determined. A numerical analysis model reflecting the conditions of candidate sites for the Ulleung Basin was constructed, and the productivity and dissociation behavior were comparatively analyzed. The pressure propagation and gas hydrate dissociation region by the multi-wells were wider and the productivity was higher than that of a single well. Different depressurization effects according to the spacing of multi-wells affected productivity. The results provide basic data for productivity analysis when establishing a field test production plan for the Ulleung Basin.
Keywords
gas hydrate; depressurization; multi-wells; numerical analysis; Ulleung Basin;
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