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Chun FENG, Xiaoli ZHANG, Guanghui LUO, Chenyang LI, Yajun LI, Yuanzi YAN, Shuhui WANG, Yisheng YIN. 0: Analysis of Injectivity for CO2 Sequestration in Saline Aquifers in the Yulin-Shenmu Region. Geological Bulletin of China. DOI: 10.12097/gbc.2024.09.041
Citation: Chun FENG, Xiaoli ZHANG, Guanghui LUO, Chenyang LI, Yajun LI, Yuanzi YAN, Shuhui WANG, Yisheng YIN. 0: Analysis of Injectivity for CO2 Sequestration in Saline Aquifers in the Yulin-Shenmu Region. Geological Bulletin of China. DOI: 10.12097/gbc.2024.09.041
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Analysis of Injectivity for CO2 Sequestration in Saline Aquifers in the Yulin-Shenmu Region

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  • Received Date: September 28, 2024
  • Revised Date: January 09, 2025
  • Accepted Date: January 20, 2025
  • Available Online: March 18, 2025
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  • The Yulin-Shenmu region, located in the northeastern Ordos Basin, boasts abundant carbon sources and a stable geological structure, making it an advantageous site for CO2 sequestration in saline aquifers. This study focuses on the Zhi 3 Member of the Zhifang Formation and the Shiqianfeng Formation, conducting CO2-water-rock interaction experiments and CO2 displacement tests to analyze the CO2 injectivity potential of saline aquifers. The CO2-water-rock interaction experiments reveal that upon CO2 injection, silicate minerals such as clay minerals and feldspars undergo varying degrees of dissolution, accompanied by the precipitation of new minerals like calcite and halite. The CO2 displacement tests indicate an increase in sandstone porosity after CO2 injection, suggesting that the initial mineral dissolution effects outweigh those of mineral precipitation, effectively enhancing the injectivity of the reservoir. Based on CO2 saturation calculations, the Shiqianfeng Formation exhibits good sequestration potential and is identified as the optimal target formation for subsequent CO2 sequestration projects in saline aquifers.
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