An Experimental Investigation of Gas-Production Rates During Depressurization of Sedimentary Methane Hydrates
- Stian Almenningen (University of Bergen) | Per Fotland (Equinor ASA) | Martin A. Fernø (University of Bergen) | Geir Ersland (University of Bergen)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- April 2019
- Document Type
- Journal Paper
- 522 - 530
- 2019.Society of Petroleum Engineers
- Methane Gas Hydrates, Pressure Depletion, Rate of Recovery
- 14 in the last 30 days
- 134 since 2007
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Sedimentary methane hydrates contain a vast amount of untapped natural gas that can be produced through pressure depletion. Several field pilots have proved the concept with days to weeks of operation, but the longer-term response remains uncertain. This paper investigates the parameters affecting the rate of gas recovery from methane-hydrate-bearing sediments. The recovery of methane gas from hydrate dissociation through pressure depletion was studied at different initial hydrate saturations and different constant production pressures in cylindrical sandstone cores. Core-scale dissociation patterns were mapped with magnetic resonance imaging (MRI), and pore-scale dissociation events were visualized in a high-pressure micromodel. Key findings from the gas-production-rate analysis are that the maximum rate of recovery is only to a small extent affected by the magnitude of the pressure reduction below the dissociation pressure, and that the hydrate saturation directly affects the rate of recovery, where intermediate hydrate saturations (0.30 to 0.50) give the highest initial recovery rate. These results are of interest to anyone who evaluates the production performance of sedimentary hydrate accumulations and demonstrate how important accurate saturation estimates are to prediction of both the initial rate of gas recovery and the ultimate-recovery efficiency.
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Almenningen, S., Flatlandsmo, J., Fernø, M. A. et al. 2017a. Multiscale Laboratory Verification of Depressurization for Production of Sedimentary Methane Hydrates. SPE J. 22 (1): 138–147. SPE-180015-PA. https://doi.org/10.2118/180015-PA.
Almenningen, S., Flatlandsmo, J., Kovscek, A. R. et al. 2017b. Determination of Pore-Scale Hydrate Phase Equilibria in Sediments Using Lab-on-a-Chip Technology. Lab on a Chip 17 (23): 4070–4076. https://doi.org/10.1039/C7LC00719A.
Almenningen, S., Iden, E., Fernø, M. A. et al. 2018. Salinity Effects on Pore-Scale Methane Gas Hydrate Dissociation. J. Geophys. Res.-Sol. Ea. 123 (7): 5599–5608. https://doi.org/10.1029/2017JB015345.
Boswell, R. and Collett, T. S. 2006. The Gas Hydrates Resource Pyramid. In Fire in the Ice, reprinted from the Fall 2006 Methane Hydrate Newsletter, US Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory, 1–4.
Clarke, M. and Bishnoi, P. R. 2001. Determination of the Activation Energy and Intrinsic Rate Constant of Methane Gas Hydrate Decomposition. Can. J. Chem. Eng. 79 (1): 143–147. https://doi.org/10.1002/cjce.5450790122.
Collett, T. S., Johnson, A. H., Knapp, C. C. et al. 2009. Natural Gas Hydrates: A Review. AAPG Memoir 89: 146–219. https://doi.org/10.1306/13201101M891602.
Colorado School of Mines. 2015. Center for Hydrate Research Software, http://hydrates.mines.edu/CHR/Software.html (accessed 10 October 2017).
Falser, S., Uchida, S., Palmer, A. C. et al. 2012. Increased Gas Production From Hydrates by Combining Depressurization With Heating of the Wellbore. Energy Fuels 26 (10): 6259–6267. https://doi.org/10.1021/ef3010652.
Fan, Z., Sun, C., Kuang, Y. et al. 2017. MRI Analysis for Methane Hydrate Dissociation by Depressurization and the Concomitant Ice Generation. Energy Procedia 105 (May): 4763–4768. https://doi.org/10.1016/j.egypro.2017.03.1038.
Graue, A., Kvamme, B., Baldwin, B. et al. 2008. MRI Visualization of Spontaneous Methane Production From Hydrates in Sandstone Core Plugs When Exposed to CO2. SPE J. 13 (2): 146–152. SPE-118851-PA. https://doi.org/10.2118/118851-PA.
Hauge, L. P., Gauteplass, J., Høyland, M. D. et al. 2016. Pore-Level Hydrate Formation Mechanisms Using Realistic Rock Structures in High-Pressure Silicon Micromodels. Int. J. Greenh. Gas Contr. 53 (October): 178–186. https://doi.org/10.1016/j.ijggc.2016.06.017.
Katsuki, D., Ohmura, R., Ebinuma, T. et al. 2008. Visual Observation of Dissociation of Methane Hydrate Crystals in a Glass Micro Model: Production and Transfer of Methane. J. Appl. Phys. 104 (8): 083514. https://doi.org/10.1063/1.3000622.
Kim, H. C., Bishnoi, P. R., Heidemann, R. A. et al. 1987. Kinetics of Methane Hydrate Decomposition. Chem. Eng. Sci. 42 (7): 1645–1653. https://doi.org/10.1016/0009-2509(87)80169-0.
Konno, Y., Yoneda, J., Egawa, K. et al. 2015. Permeability of Sediment Cores From Methane Hydrate Deposit in the Eastern Nankai Trough. Mar. Petrol. Geol. 66 (September): 487–495. https://doi.org/10.1016/j.marpetgeo.2015.02.020.
Kvamme, B., Graue, A., Buanes, T. et al. 2007. Storage of CO2 in Natural Gas Hydrate Reservoirs and the Effect of Hydrate as an Extra Sealing in Cold Aquifers. Int. J. Greenh. Gas Contr. 1 (2): 236–246. https://doi.org/10.1016/S1750-5836(06)00002-8.
Lee, J., Park, S., and Sung, W. 2010. An Experimental Study on the Productivity of Dissociated Gas From Gas Hydrate by Depressurization Scheme. Energ. Convers. Manage. 51 (12): 2510–2515. https://doi.org/10.1016/j.enconman.2010.05.015.
Moridis, G. J., Collett, T. S., Boswell, R. et al. 2009. Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential. SPE Res Eval & Eng 12 (5): 745–771. SPE-114163-PA. https://doi.org/10.2118/114163-PA.
Moridis, G. J., Kowalsky, M. B., and Pruess, K. 2007. Depressurization-Induced Gas Production From Class-1 Hydrate Deposits. SPE Res Eval & Eng 10 (5): 458–481. SPE-97266-PA. https://doi.org/10.2118/97266-PA.
Ruppel, C. D. and Kessler, J. D. 2017. The Interaction of Climate Change and Methane Hydrates. Rev. Geophys. 55 (1): 126–168. https://doi.org/10.1002/2016RG000534.
Seol, Y. and Myshakin, E. 2011. Experimental and Numerical Observations of Hydrate Reformation During Depressurization in a Core-Scale Reactor. Energy Fuels 25 (3): 1099–1110. https://doi.org/10.1021/ef1014567.
Tang, L.-G., Li, X.-S., Feng, Z.-P. et al. 2007. Control Mechanisms for Gas Hydrate Production by Depressurization in Different Scale Hydrate Reservoirs. Energy Fuels 21 (1): 227–233. https://doi.org/10.1021/ef0601869.
Tohidi, B., Anderson, R., Clennell, M. B. et al. 2001. Visual Observation of Gas-Hydrate Formation and Dissociation in Synthetic Porous Media by Means of Glass Micromodels. Geology 29 (9): 867–870. https://doi.org/10.1130/0091-7613(2001)029<0867:VOOGHF>2.0.CO;2.
Yamamoto, K., Terao, Y., Fujii, T. et al. 2014. Operational Overview of the First Offshore Production Test of Methane Hydrates in the Eastern Nankai Trough. Presented at the Offshore Technology Conference, Houston, 5–8 May. OTC-25243-MS. https://doi.org/10.4043/25243-MS.
Yousif, M. H., Li, P. M., Selim, M. S. et al. 1990. Depressurization of Natural Gas Hydrates in Berea Sandstone Cores. J. Inclus. Phenom. Mol. 8 (1–2): 71–88. https://doi.org/10.1007/BF01131289.