CO2 injection into submarine sediments: disturbing news for methane-rich hydrates

Bigalke, Nikolaus K., Kossel, Elke, Deusner, Christian, Savy, Jean-Philippe and Haeckel, Matthias (2011) CO2 injection into submarine sediments: disturbing news for methane-rich hydrates Proceedings of the 7th International Conference on Gas Hydrates (ICGH2011). HWU, Edinburgh, UK, 591/1-9.

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Abstract

The production of natural gas via injection of fossil-fuel derived CO2 into submarine gas hydrate reservoirs can be an example of tapping a hydrocarbon energy source in a CO2-neutral manner. However, the industrial application of this method is technically challenging. Thus, prior to feasibility testing in the field, multi-scale laboratory experiments and adapted reaction-modeling are needed. To this end, high-pressure flow-through reactors of 15 and 2000 mL sample volume were constructed and tested. Process parameters (P, T, Q, fluid composition) are defined by a fluid supply and conditioning unit to enable simulation of natural fluid-flow scenarios for a broad range of sedimentary settings. Additional Raman- and NMR-spectroscopy aid in identifying the most efficient pathway for CH4 extraction from hydrates via CO2 injection on both microscopic and macroscopic level. In this study we present experimental set-up and design of the highpressure flow-through reactors as well as CH4 yields from H4-hydrate decomposition experiments using CO2-rich brines and pure liquefied CO2.

Document Type: Book chapter
Additional Information: 7th International Conference on Gas Hydrates (ICGH2011), Edinburgh, UK, 17.-21.07.2011
Keywords: Meeresgeologie; CO2 injection, hydrate conversion, CH4 extraction, hydrate-bearing sediments, gas hydrates, CCS, energy, methane
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Refereed: No
Date Deposited: 09 Nov 2011 15:09
Last Modified: 06 Jul 2012 15:10
URI: http://eprints.uni-kiel.de/id/eprint/12477

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