TY - JOUR
T1 - Numerical study on the application of in situ low-temperature oxidation for enhanced recovery from methane hydrate reservoir
AU - Sakamoto, Yasuhide
AU - Kaneko, Fuyuki
AU - Nakano, Yusuke
AU - Nakamura, Kengo
AU - Komai, Takeshi
PY - 2020
Y1 - 2020
N2 - In this study, a new in situ low-temperature oxidation (LTO) process was developed under the concept of effective utilization of heat generation, resulting from LTO of the injected organic substance (IOS), for the promotion of in situ dissociation of methane hydrate (MH) and the enhancement of gas recovery. When water containing the IOS component and air as an oxidant are injected into the MH reservoir, a high-temperature zone by heat generation is formed under the in situ condition. From this process, in addition to MH dissociation, a numerical model considering multicomponent flow in porous media with LTO reaction was constructed. From the calculation results, it was found that the high-temperature zone formed as a result of heat generation extended to the side of the production well, which promoted MH dissociation. In addition, gas recovery as high as 80% to 100% could be obtained through depressurization and in situ LTO process.
AB - In this study, a new in situ low-temperature oxidation (LTO) process was developed under the concept of effective utilization of heat generation, resulting from LTO of the injected organic substance (IOS), for the promotion of in situ dissociation of methane hydrate (MH) and the enhancement of gas recovery. When water containing the IOS component and air as an oxidant are injected into the MH reservoir, a high-temperature zone by heat generation is formed under the in situ condition. From this process, in addition to MH dissociation, a numerical model considering multicomponent flow in porous media with LTO reaction was constructed. From the calculation results, it was found that the high-temperature zone formed as a result of heat generation extended to the side of the production well, which promoted MH dissociation. In addition, gas recovery as high as 80% to 100% could be obtained through depressurization and in situ LTO process.
KW - Dissociation
KW - Enhanced gas recovery
KW - In situ heat generation
KW - Low-temperature oxida-tion
KW - Methane hydrate
KW - Simulation
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U2 - 10.17736/ijope.2020.jc760
DO - 10.17736/ijope.2020.jc760
M3 - Article
AN - SCOPUS:85086769140
VL - 30
SP - 228
EP - 239
JO - International Journal of Offshore and Polar Engineering
JF - International Journal of Offshore and Polar Engineering
SN - 1053-5381
IS - 2
ER -