TY - JOUR
T1 - Numerical simulation of a laboratory-scale experiment for the hydrate dissociation process in porous media by acid injection
AU - Sakamoto, Yasuhide
AU - Nakano, Yusuke
AU - Kaneko, Fuyuki
AU - Nakamura, Kengo
AU - Komai, Takeshi
N1 - Funding Information:
This study was financially supported by the Research Consortium for Methane Hydrate Resources in Japan (MH21 Research Consortium) planned by Ministry of Economy, Trade and Industry (METI). The authors thank the entire personnel related to MH21 Research Consortium.
Publisher Copyright:
© by The International Society of Offshore and Polar Engineers.
PY - 2020/12
Y1 - 2020/12
N2 - In this study, to enhance gas recovery from a methane hydrate reservoir, experimental and numerical studies that con-sidered the acid injection process as a secondary gas recovery process after the depressurization operation were conducted. First, we experimentally analyzed the dissociation behavior of propane hydrate (PGH) in porous media by using acid injection and confirmed that the dissociation condition of PGH was shifted to the sides of low temperature and high pressure. This enabled the dissociation to proceed easily as the concentration of the injected acid increased. Then, on the basis of experimental observation, we conducted history matching for the temperature change and gas production behavior during PGH dissociation by acid injection, by varying the initial hydrate saturation, the reaction rate constant for acid consump-tion, and the intrinsic dissociation rate constant as the calculation parameters. Through history matching, we confirmed the validity of the developed numerical model targeting the dissociation of hydrates in porous media by acid injection.
AB - In this study, to enhance gas recovery from a methane hydrate reservoir, experimental and numerical studies that con-sidered the acid injection process as a secondary gas recovery process after the depressurization operation were conducted. First, we experimentally analyzed the dissociation behavior of propane hydrate (PGH) in porous media by using acid injection and confirmed that the dissociation condition of PGH was shifted to the sides of low temperature and high pressure. This enabled the dissociation to proceed easily as the concentration of the injected acid increased. Then, on the basis of experimental observation, we conducted history matching for the temperature change and gas production behavior during PGH dissociation by acid injection, by varying the initial hydrate saturation, the reaction rate constant for acid consump-tion, and the intrinsic dissociation rate constant as the calculation parameters. Through history matching, we confirmed the validity of the developed numerical model targeting the dissociation of hydrates in porous media by acid injection.
KW - Acid injection
KW - Dissociation
KW - History matching
KW - Methane hydrate
KW - Numerical simulation
KW - Porous media
KW - Propane hydrate
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U2 - 10.17736/ijope.2020.jc790
DO - 10.17736/ijope.2020.jc790
M3 - Article
AN - SCOPUS:85098889430
VL - 30
SP - 501
EP - 512
JO - International Journal of Offshore and Polar Engineering
JF - International Journal of Offshore and Polar Engineering
SN - 1053-5381
IS - 4
ER -