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Sensible heat aided gas production from gas hydrate with an underlying water-rich shallow gas layer.

Sensible heat aided gas production from gas hydrate with an underlying water-rich shallow gas layer.

Authors :
Qu, Aoxing
Guan, Dawei
Jiang, Zhibo
Fan, Qi
Li, Qingping
Zhang, Lunxiang
Zhao, Jiafei
Yang, Lei
Song, Yongchen
Source :
Energy. Dec2023, Vol. 284, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

Increasing the efficiency of gas production from marine gas hydrate still faces significant problems. Based on the geological survey of marine reservoirs, gas hydrates are generally associated with underlying free gas layers with high temperature and water saturation. Here the effect of this gas layer and its characteristics on the gas and water production from the hydrate layer are studied. It was found that a large temperature difference existed between the two layers during gas production due to the different heat demand and consumption in each layer. Slower gas production rate was observed in case of dense distribution of hydrates in the hydrate-bearing layer and the resulting sluggish gas permeation and enormous heat supply. Notably, this was not present when the free gas layer was more water-saturated. The resulting maximum gas production rate could be effectively enhanced by 41 % at most as well. This was attributed to the increased sensible heat available from the pore water and the interbedded heat exchange. It was thus indicated that a hydrate reservoir with an underlying water-rich layer could be more favorable for gas production in terms of heat supply. • Joint exploitation through pre-embedding compartment device and vertical well. • A significant temperature difference between the two layers during exploitation. • Highly water-saturated underlying shallow gas layer enhance hydrate decomposition. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03605442
Volume :
284
Database :
Academic Search Index
Journal :
Energy
Publication Type :
Academic Journal
Accession number :
173322140
Full Text :
https://doi.org/10.1016/j.energy.2023.129273