Please use this identifier to cite or link to this item: https://doi.org/10.1021/ef3010652
Title: Increased gas production from hydrates by combining depressurization with heating of the wellbore
Authors: Falser, S.
Uchida, S.
Palmer, A.C. 
Soga, K.
Tan, T.S. 
Issue Date: 18-Oct-2012
Citation: Falser, S., Uchida, S., Palmer, A.C., Soga, K., Tan, T.S. (2012-10-18). Increased gas production from hydrates by combining depressurization with heating of the wellbore. Energy and Fuels 26 (10) : 6259-6267. ScholarBank@NUS Repository. https://doi.org/10.1021/ef3010652
Abstract: To extract gas from hydrate reservoirs, it has to be dissociated in situ. This endothermic dissociation process absorbs heat energy from the formation and pore fluid. The heat transfer governs the dissociation rate, which is proportional to the difference between the actual temperature and the equilibrium temperature. This study compares three potential gas production schemes from hydrate-bearing soil, where the radial heat transfer is governing. Cylindrical samples with 40% pore-filling hydrate saturation were tested. The production tests were carried out over 90 min by dissociating the hydrate from a centered miniature wellbore, by either lowering the pressure to 6, 4, or 6 MPa with simultaneous heating of the wellbore to 288 K. All tests were replicated by a numerical simulation. With additional heating at the same wellbore pressure, the gas production from hydrates could, on average, be increased by 1.8 and 3.6 times in the simulation and experiments, respectively. If the heat influx from the outer boundary is limited, a simulation showed that the specific heat of the formation is rapidly used up when the wellbore is only depressurized and not heated. © 2012 American Chemical Society.
Source Title: Energy and Fuels
URI: http://scholarbank.nus.edu.sg/handle/10635/91020
ISSN: 08870624
DOI: 10.1021/ef3010652
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

37
checked on May 14, 2018

WEB OF SCIENCETM
Citations

30
checked on Apr 30, 2018

Page view(s)

25
checked on May 18, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.