Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026294 |
Capillary Trapping of CO2 in Sandstone Using Low Field NMR Relaxometry | |
Connolly, Paul R. J.1; Vogt, Sarah J.1; Mahmoud, Mohamed2; Ng, Christopher N. Y.1; May, Eric F.1; Johns, Michael L.1 | |
2019-12-10 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:10466-10478 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; Saudi Arabia |
英文摘要 | Injecting carbon dioxide into geological formations for long-term storage is considered integral to reducing greenhouse gas emissions. Residual trapping of CO2 is a primary storage mechanism, whereby CO2 ganglia are trapped in the pore space by capillary forces. Experimental knowledge of residual trapping processes in rocks is critical to the development of safe storage strategies. Here we present a quantitative low field H-1 nuclear magnetic resonance (NMR) core flooding study of CO2 residual trapping in three different sandstones. It was found that transverse relaxation (T-2) measurements were sensitive to the dissolution of paramagnetic ions from rock matrix minerals after exposure to carbonic acid; this response was observed on time scales relevant to core flooding experiments (i.e., minutes to hours). Subsequently, a brine aging protocol was designed and implemented to minimize this chemical effect, and hence, by applying the well-known T-2-pore size relationship, changes in T-2 time distributions during core flooding could be related to displacement of brine from pores of different sizes. Comparison of T-2 distributions for partially CO2/brine-saturated cores to previously published data for N-2/H2O systems shows an increased displacement of brine from small pores by CO2. Furthermore, results from cyclical brine/CO2 injections showed an increase in the total volume of residually trapped CO2 and an increase in trapping efficiency; compared to the results observed for N-2/H2O, however, the improvement in trapping efficiency with cyclic injection was less pronounced. Potential causes for the observed differences are discussed in the context of effective N-2 and CO2 wetting. |
英文关键词 | Carbon sequestration capillary trapping NMR relaxation |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501669200001 |
WOS关键词 | RELATIVE PERMEABILITY ; SUPERCRITICAL CO2 ; CARBON-DIOXIDE ; RELAXATION ; WATER ; SIMULATION ; SEQUESTRATION ; EQUATIONS ; STORAGE ; FLUIDS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223967 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Western Australia, Fac Engn & Math Sci, Dept Chem Engn, M050, Crawley, WA, Australia; 2.King Fahd Univ Petr & Minerals, Coll Petr Engn & Geosci, Petr Engn Dept, Dhahran, Saudi Arabia |
推荐引用方式 GB/T 7714 | Connolly, Paul R. J.,Vogt, Sarah J.,Mahmoud, Mohamed,et al. Capillary Trapping of CO2 in Sandstone Using Low Field NMR Relaxometry[J]. WATER RESOURCES RESEARCH,2019,55(12):10466-10478. |
APA | Connolly, Paul R. J.,Vogt, Sarah J.,Mahmoud, Mohamed,Ng, Christopher N. Y.,May, Eric F.,&Johns, Michael L..(2019).Capillary Trapping of CO2 in Sandstone Using Low Field NMR Relaxometry.WATER RESOURCES RESEARCH,55(12),10466-10478. |
MLA | Connolly, Paul R. J.,et al."Capillary Trapping of CO2 in Sandstone Using Low Field NMR Relaxometry".WATER RESOURCES RESEARCH 55.12(2019):10466-10478. |
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