Abstract
Theoretical analysis was carried out to investigate the dissociation of gas hydrate in stiff sediment. First the mathematical model for gas hydrate dissociation was decoupled by asymptotic expansion method considering the order differences of time scales among seepage, dissociation of gas hydrate and heat conduction. The multi-scale perturbation method was used to solve the problem. It is shown that seepage is the fastest process. The heat conduction is the slowest process. With the pressure decreases at the boundary, pressure changes first while no hydrate dissociation and heat conduction occur. Gradually, dissociation causes the decrease of temperature. After a long time, heat can conduct to cause the increase of temperature. Otherwise, the decreased temperature will cause the stop of dissociation if no heat is supplied in time.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Jin, Z.H., Johnson, S.E., Cook, A.E.: Crack extension induced by dissociation of fracture-hosted methane gas hydrate. Geophys. Res. Lett. 42(20), 8522–8529 (2015)
Lu, X.B., Wang, L., Wang, S.Y., Li, Q.P.: Instability of seabed and pipes induced by NGH dissociation. In: Proceedings of the Nineteenth International Offshore and Polar Engineering Conference, Beijing, pp. 110–114 (2010)
Makogon, Y.F.: Hydrates of Hydrocarbons. Penn Well, Tulsa (1997)
Englezos, P.: Reviews: clathrate hydrates. Ind. Eng. Chem. 32, 1251–1274 (1993)
Sloan, E.D.: Clathrate hydrates of natural gases. Marcel Dekker, New York (1998)
Selim, M.S., Sloan, E.D.: Heat and mass transfer during the dissociation of hydrates in porous media. AIChE J. 35, 1049–1052 (1989)
Tsypkin, G.: Mathematical models of gas hydrates dissociation in porous media. In: Holder, G.D., Bishnoi, P.R. (eds.) New York Academy of Sciences, New York, pp. 428–436 (2000)
Lu, X.B., Wang, S., Zhang, X., Li, Q.P., Yao, H.Y.: A mathematical model for dissociation of gas hydrate. In: Proceedings of the Nineteenth International Offshore and Polar Engineering Conference, Osaka, Japan (2009)
Moridis, G., Apps, J., Pruess, K., Myer, L.: EOSHYDR: a TOUGH2 module for ch4 – hydrate release and flow in the subsurface. Lawrence Berkeley National Laboratory, Berkeley, CA, LBNL-42386 (1998)
Swinkels, W.J.A.M., Drenth, R.J.J.: Thermal reservoir simulation model of production from naturally occurring gas hydrate accumulations. In: SPE 56550, Annual Technical Conference, Houston, TX October, pp. 465–477 (1999)
Zhang, X.H., Lu, X.B., Li, Q.P.: Thermally induced evolution of phase transformations in gas hydrate sediment. Sci. China Phys. Mech. Astron. 53(8), 1530–1535 (2010)
Ji, C., Ahmadi, G., Smith, D.H.: Natural gas production from hydrate decomposition by depressurization. Chem. Eng. Sci. 56, 5801–5814 (2001)
Hillman, J.I.T., Cook, A.E., Daigle, H., Nole, M., Malinverno, A., Meazell, K., Flemings, P.B.: Gas hydrate reservoirs and gas migration mechanisms in the Terrebonne Basin, Gulf of Mexico. Mar. Pet. Geol. 2017(86), 1357–1373 (2017)
You, K.H., Flemings, P.B.: Methane hydrate formation in in thick sand reservoirs: 1. Short-range diffusion. Mar. Pet. Geol. 89, 428–442 (2018)
Yan, K.X.: Advanced Mechanics of Fluids in Porous Media, University of Science and Technology of China Press, Beijing (1999)
Liu, L.L., Lu, X.B., Zhang, X.H.: A theoretical model for predicting the spatial distribution of gas hydrate dissociation under the combination of depressurization and heating without the discontinuous interface assumption. J. Pet. Sci. Eng. 133, 589–601 (2015)
Acknowledgement
This project is supported by the Open Research Fund of Shanghai Key Laboratory of Mechanics in Energy Engineering and China natural Science Fund (No.11272314 and No.51239010).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Lu, X.B., Lu, L., Zhang, X.H., Wang, S.Y. (2018). Theoretical Analysis of Gas Hydrate Dissociation in Sediment. In: Zhang, L., Goncalves da Silva, B., Zhao, C. (eds) Proceedings of GeoShanghai 2018 International Conference: Rock Mechanics and Rock Engineering. GSIC 2018. Springer, Singapore. https://doi.org/10.1007/978-981-13-0113-1_13
Download citation
DOI: https://doi.org/10.1007/978-981-13-0113-1_13
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-0112-4
Online ISBN: 978-981-13-0113-1
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)