HR: 1340h
AN: NG23E-0122    [Abstracts]
TI: Numerical simulation of MH growth/dissociation by hot water injection on the Lab. experiment
AU: * Temma, N
EM: temma@lanl.gov
AF: National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, 305-8569 Japan
AU: Sakamoto, Y
EM: sakamoto-yasuhide@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, 305-8569 Japan
AU: Komai, T
EM: takeshi-komai@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, 305-8569 Japan
AU: Yamaguchi, T
EM: t-yamaguchi@aist.go.jp
AF: National Institute of Advanced Industrial Science and Technology (AIST), 16-1, Onogawa, Tsukuba, 305-8569 Japan
AU: Pawar, R
EM: rajesh@lanl.gov
AF: Loa Alamos National Laboratory (LANL), Group EES-6, MS T003, Los Alamos, NM 87545 United States
AU: Zyvoloski, G
EM: gaz@lanl.gov
AF: Loa Alamos National Laboratory (LANL), Group EES-6, MS T003, Los Alamos, NM 87545 United States
AB: Methane Hydrate (MH) is considered to be one of the new-generation energy resources. Aiming to develop the method of extraction of methane gas from MH, laboratory experiments have been performed in order to grasp the MH property in the National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba in Japan. In this paper, we present the results of the numerical simulation of experiment using by the hot water injection. In this calculation, FEHM (Finite Element Heat and Mass transfer) code is used. This code is developed at Los Alamos National Laboratory. In this experiment, temperature, pressure and cumulative gas production were measured. From these data, we suppose that MH growth/dissociation occurred by the flow of the hot water. And we make the model of the growth/dissociation. As this model consist of many parameters, it is difficult to determine parameters. Thus, we use PEST (Parameter ESTimation ) in order to determine parameters for the model of the MH growth/ dissociation. We use temperature data of experiment, as observed data. We make two observed data sets at the beginning and later term of experiment. At the results of PEST, we obtain two sets of parameters to get good match the observed data. We think that these sets indicate both the maximum and the minimum values of the MH growth/dissociation model. And, on this range, we continue to calculate until we get the good match. Finally, we obtain the numerical model of the experiment. Also, we conducted the sensitive analysis for the MH growth/ dissociation using this model.
DE: 0545 Modeling (4255)
DE: 0550 Model verification and validation
DE: 3004 Gas and hydrate systems
SC: Nonlinear Geophysics [NG]
MN: Fall Meeting 2005