The effect of H2S content on acid gas migration and storage in shale reservoir by numerical simulation

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS
Xiaoyan Zhang, Ning Liu, Qi Li, Pingzhi Chen, Xiaochen Wei
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Abstract

Acid gas injection is one of the most effective strategies to deal with waste gas generated during the development of sour oil and gas reservoirs. This study numerically investigates the effect of H2S content on the acid gas migration and storage in shale reservoirs. The results indicate that the variations of acid gas density, viscosity, solubility, relative permeability, and capillary pressure caused by different H2S contents have great influence on the acid gas plume migration. When acid gas is in gas state, the maximum horizontal flow appears at the lower part of the reservoir after 5 years, and the horizontal migration distance first decreases and then remains unchanged with the increase of H2S content. Hereafter, the maximum horizontal migration distance appears at the top of the reservoir, and the horizontal migration distance first increases and then remains unchanged with the increase of H2S content. When acid gas is in liquid state, the maximum horizontal migration distance appears at the lower part of the reservoir in the early stage of injection. The horizontal migration distance decreases with the increase of H2S content. Subsequently, the maximum horizontal migration distance first decreases and then increases. The vertical migration distance increases gradually with the increase of H2S content until the acid gas reaches the top of the reservoir, and then the vertical migration distance remains unchanged. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.

数值模拟研究H2S含量对页岩油气藏酸性气运移和储集的影响
注酸气是处理含酸油气藏开发过程中产生的废气最有效的策略之一。通过数值模拟研究了H2S含量对页岩储层酸性气运移和储集的影响。结果表明,不同H2S含量引起的酸性气体密度、粘度、溶解度、相对渗透率和毛管压力的变化对酸性气体羽流运移有较大影响。酸性气处于气态时,5年后在储层下部出现最大水平流动,水平运移距离随H2S含量的增加先减小后保持不变。此后,最大水平运移距离出现在储层顶部,随着H2S含量的增加,水平运移距离先增大后保持不变。当酸性气体为液态时,注入初期最大水平运移距离出现在储层下部。随着H2S含量的增加,水平迁移距离减小。随后,最大水平偏移距离先减小后增大。垂直运移距离随着H2S含量的增加逐渐增大,直到酸性气体到达储层顶部,然后垂直运移距离保持不变。©2023化学工业协会和John Wiley &儿子,有限公司
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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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