低渗卤水盆地提高CO<sub>2</sub>注入性的技术方法: 以江汉盆地为例

房琦; 李义连; 程鹏; 喻英; 刘丹青; 宋少宇

doi:10.3799/dqkx.2014.150

Volume 39 Issue 11

Nov. 2014

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Article Navigation > Earth Science > 2014 > 39(11): 1575-1583

Fang Qi, Li Yilian, Cheng Peng, Yu Ying, Liu Danqing, Song Shaoyu, 2014. Enhancing CO2 Injectivity in High-Salinity and Low-Permeability Aquifers: A Case Study of Jianghan Basin, China. Earth Science, 39(11): 1575-1583. doi: 10.3799/dqkx.2014.150

Citation:

Fang Qi, Li Yilian, Cheng Peng, Yu Ying, Liu Danqing, Song Shaoyu, 2014. Enhancing CO₂ Injectivity in High-Salinity and Low-Permeability Aquifers: A Case Study of Jianghan Basin, China. Earth Science, 39(11): 1575-1583. doi: 10.3799/dqkx.2014.150

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Enhancing CO₂ Injectivity in High-Salinity and Low-Permeability Aquifers: A Case Study of Jianghan Basin, China

doi: 10.3799/dqkx.2014.150

Fang Qi^{1, 2
,},
Li Yilian^{1
,
,},
Cheng Peng³,
Yu Ying¹,
Liu Danqing¹,
Song Shaoyu¹

1.
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
2.
School of Environmental Protection and Safety Engineering, University of South China, Hengyang 421001, China
3.
Team 217 of Hunan Bureau of Nonferrous Geological Exploration, Hengyang 421001, China

Received Date: 2014-03-02
Publish Date: 2014-11-01

Abstract

Abstract

Injectivity is a crucial technical and economical issue for CO₂ geological storage projects due to large volumes of CO₂ to be stored. Assessment and enhancement of CO₂ injectivity in ubiquitous low-permeability reservoirs in the continental sedimentary basins of China is of great significance to the application and development of carbon capture and storage (CCS) in China. Numerical simulation was carried out to investigate the potential and enhancement of CO₂ injectivity in high-salinity and low-permeability aquifers by taking Jiangling depression of Jianghan basin as the study area. The results show that pre-injection of freshwater and low-salinity saline water can effectively mitigate salt precipitation around the CO₂ injection well at different levels; pre-injection of CO₂-saturation solution and diluted HCl solution can significantly improve the porosity and permeability values and enhance CO₂ injectivity. However, it is difficult to achieve a significant increase in CO₂ injection rate in a short time due to the limited migration distance resulted from the low-permeability nature. Hydraulic fracturing measures can significantly increase CO₂ injectivity and the improved capacity largely depends on fracturing half-length and fracturing degree. Therefore, for a single vertical well, it is possible to achieve the injection of hundreds of thousands of tons of CO₂ per year to low-permeability reservoirs by adopting hydraulic fracturing measures and multi-layer injection.
- CO₂ injectivity,
- high salinity,
- low-permeability aquifer,
- enhancement measure,
- hydrogeology

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References(22)

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