System Response During Short- and Long-Term Gas Production from a Gas Hydrate Deposit at the Site of a Planned Field Test in the Ulleung Basin of the Korean East Sea

2014 ◽  
Author(s):  
George J. Moridis ◽  
Jihoon Kim ◽  
Matthew T. Reagan ◽  
Se-Joon Kim
Keyword(s):  
Field Test ◽  
Gas Hydrate ◽  
Gas Production ◽  
East Sea ◽  
Ulleung Basin ◽  
System Response ◽  
Short And Long Term ◽  
Hydrate Deposit

Seismic characterization and imaging of a gas hydrate deposit in the western part of the Ulleung Basin, the East Sea (Japan Sea)

2013 ◽  
Vol 47 ◽  
pp. 214-221 ◽  
Author(s):  
Han-Joon Kim ◽  
Hyeong-Tae Jou ◽  
Seung-Goo Kang ◽  
Gwang Hoon Lee ◽  
Bo Yeon Yi ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
Japan Sea ◽  
East Sea ◽  
Ulleung Basin ◽  
Seismic Characterization ◽  
Hydrate Deposit

scholarly journals Numerical Simulation of Gas Hydrate Production Using the Cyclic Depressurization Method in the Ulleung Basin of the Korea East Sea

2021 ◽  
Vol 11 (20) ◽  
pp. 9748
Author(s):  
Taehun Lee ◽  
Joo Yong Lee ◽  
Taewoong Ahn ◽  
Han Am Son
Keyword(s):  
Numerical Simulation ◽  
Gas Hydrate ◽  
Vertical Displacement ◽  
Gas Production ◽  
East Sea ◽  
Ulleung Basin ◽  
Production Time ◽  
Methane Recovery ◽  
Gas Hydrate Deposits ◽  
Bottomhole Pressure

The depressurization method is known as the most productive and effective method for successful methane recovery from hydrate deposits. However, this method can cause considerable subsidence because of the increased effective stress. Maintenance of geomechanical stability is necessary for sustainable production of gas from gas hydrate deposits. In this study, the cyclic depressurization method, which uses changing the bottomhole pressure and production time during primary and secondary depressurization stage, was utilized in order to increase stability in the Ulleung Basin of the Korea East Sea. Various case studies were conducted with alternating bottomhole pressure and production time of the primary and secondary depressurization stages over 400 days. Geomechanical stability was significantly enhanced, while cumulative gas production was relatively less reduced or nearly maintained. Specially, the cumulative gas production of the 6 MPa case was more than three times higher than that of the 9 MPa case, while vertical displacement was similar between them. Therefore, it was found that the cyclic depressurization method should be applied for the sake of geomechanical stability.

Consideration on the gas and gas hydrate indicators in seismic profiles based on drilling result from the Ulleung Basin, East Sea

2015 ◽  
Vol 51 (6) ◽  
pp. 561 ◽  
Author(s):  
Dong-Hyo Kang ◽  
Jong-Hwa Chun ◽  
Nam-Hyung Koo ◽  
Won-Sik Kim ◽  
Ho-Young Lee
Keyword(s):  
Gas Hydrate ◽  
East Sea ◽  
Ulleung Basin ◽  
Seismic Profiles
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