Flow regimes and storage efficiency of CO2 injected into depleted shale reservoirs

FUEL

卷:246

Article

Myshakin, Evgeniy M.^1,2,3  Singh, Harpreet^1,2,4  Sanguinito, Sean^1,2,3  Bromhal, Grant^1,2  Goodman, Angela L.^1,2 

[1] US DOE, Natl Energy Technol Lab, 626 Cochran Mill Rd, Pittsburgh, PA 15236 USA

[2] US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA

[3] LRST, 626 Cochran Mill Rd,POB 10940, Pittsburgh, PA 10940 USA

[4] Oak Ridge Inst Sci & Educ, 100 ORAU Way, Oak Ridge, TN 37830 USA

关键词: Carbon sequestration;    Flow regimes;    Shale;    Rate transient analysis;   

DOI  :  10.1016/j.fuel.2019.02.095

来源: Elsevier

【 摘 要 】

Depleted shale reservoirs are potentially attractive targets to store carbon dioxide (CO2) as free and adsorbed phases. The time-dependent efficiency factors that depict dynamic storage performance in shale are estimated as a function of key reservoir parameters, shapes of stimulated reservoir volume, and injection scenarios. Efficiency of CO2 storage and flow regimes are determined dynamically as CO2 is injected in a depleted shale formation for a time period of 60 years. The most effective reservoir utilization for carbon storage was achieved during the transition from predominant flow in the stimulated reservoir volume to flow into unfractured zones. That transition occurs within first 15-30 years of injection depending on cases considered. The importance of adsorption as a mechanism of storage is determined based on sensitivity, which indicates that the amount of CO2 stored by adsorption would be on average similar to 26% of the CO2 stored as a free phase.

【 授权许可】

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