Long-term CO2 sequestration mechanisms and influence of injection mode in Zhujiang Formation of Pearl River Mouth Basin

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2024-01-31 DOI:10.1002/ghg.2261
Tao Xuan, Xiaomin Cao, Qi Li, Fangfang Li, Liang Xu
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Abstract

In this paper, the mechanisms of long-term CO2 sequestration and the effects of injection modes (including injection temperature, injection rate and injection cycle) in Zhujiang Formation characterized by high porosity and permeability were investigated using the numerical simulation method. Simulation results showed that more than 88% of the injected CO2 would exist in a supercritical state during the injection period and more than 79% of CO2 would be sequestrated in the reservoir by mineral trapping after 5,000 years. Eventually, the distribution shape of SC-CO2 was a quarter funnel near the injection well, while the distribution shapes of dissolved and mineralized CO2 were both one quarter rotunda. During the long-term CO2 sequestration in Zhujiang Formation, the dissolved minerals were anorthite, chlorite and smectite in turn, while the top three main precipitated minerals were calcite, dawsonite and albite. Moreover, higher injection temperature leads to a higher mineral tapping and more dissolved/precipitated minerals. While higher injection rate reduces the mineral tapping and total amount of dissolved/precipitated mineral. Compared to injection temperature and injection rate, the injection cycle has little effect on the CO2 phase evolution and mineral dissolution/precipitation process. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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珠江口盆地珠江地层二氧化碳长期封存机理及注入模式的影响
本文采用数值模拟方法,研究了以高孔隙度和高渗透率为特征的珠江地层长期封存二氧化碳的机理以及注入模式(包括注入温度、注入速度和注入周期)的影响。模拟结果表明,88%以上的注入二氧化碳在注入期间以超临界状态存在,79%以上的二氧化碳在 5,000 年后通过矿物捕集封存在储层中。最终,SC-CO2 的分布形状在注入井附近呈四分之一漏斗状,而溶解的 CO2 和矿化的 CO2 的分布形状均为四分之一圆形。在珠江地层的长期二氧化碳封存过程中,溶解矿物依次为阳起石、绿泥石和闪长岩,而主要沉淀矿物的前三位依次为方解石、褐铁矿和白云石。此外,较高的注入温度会导致较高的矿物吸附量和更多的溶解/沉淀矿物。而较高的注入速率则会降低矿物萃取率和溶解/沉淀矿物的总量。与注入温度和注入速率相比,注入周期对二氧化碳相演化和矿物溶解/沉淀过程的影响很小。© 2024 化学工业学会和约翰-威利-桑普森有限公司版权所有。
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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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