دورية
Rapid microbial methanogenesis during CO2storage in hydrocarbon reservoirs
العنوان: | Rapid microbial methanogenesis during CO2storage in hydrocarbon reservoirs |
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المؤلفون: | Tyne, R. L., Barry, P. H., Lawson, M., Byrne, D. J., Warr, O., Xie, H., Hillegonds, D. J., Formolo, M., Summers, Z. M., Skinner, B., Eiler, J. M., Ballentine, C. J. |
المصدر: | Nature; December 2021, Vol. 600 Issue: 7890 p670-674, 5p |
مستخلص: | Carbon capture and storage (CCS) is a key technology to mitigate the environmental impact of carbon dioxide (CO2) emissions. An understanding of the potential trapping and storage mechanisms is required to provide confidence in safe and secure CO2geological sequestration1,2. Depleted hydrocarbon reservoirs have substantial CO2storage potential1,3, and numerous hydrocarbon reservoirs have undergone CO2injection as a means of enhanced oil recovery (CO2-EOR), providing an opportunity to evaluate the (bio)geochemical behaviour of injected carbon. Here we present noble gas, stable isotope, clumped isotope and gene-sequencing analyses from a CO2-EOR project in the Olla Field (Louisiana, USA). We show that microbial methanogenesis converted as much as 13–19% of the injected CO2to methane (CH4) and up to an additional 74% of CO2was dissolved in the groundwater. We calculate an in situ microbial methanogenesis rate from within a natural system of 73–109 millimoles of CH4per cubic metre (standard temperature and pressure) per year for the Olla Field. Similar geochemical trends in both injected and natural CO2fields suggest that microbial methanogenesis may be an important subsurface sink of CO2globally. For CO2sequestration sites within the environmental window for microbial methanogenesis, conversion to CH4should be considered in site selection. |
قاعدة البيانات: | Supplemental Index |
تدمد: | 00280836 14764687 |
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DOI: | 10.1038/s41586-021-04153-3 |