CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir

  • Mohammad Afkhami Karaei Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Bizhan Honarvar Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Amin Azdarpour Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Erfan Mohammadian Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Abstract

The lack of fundamental experimental studies on low permeable carbonate reservoirs for CO2 sequestration purposes is essential for further application of CO2 sequestration as a highly-anticipated CO2 mitigation method in deep saline aquifers, specifically those with low permeabilities. The core samples were taken from a carbonate reservoir in Iran and the brine composition was based on that of the same formation. The objective of this study is to investigate permeability alteration during CO2 sequestration in the aquifers of a low permeable Iranian carbonate reservoir. Various parameters have been investigated. The effects of different parameters such as injection pressure, confining pressure, and temperature on permeability alteration of the cores was investigated. Moreover, the interfacial tension (IFT) of CO2/brine was also determined at pressures and temperatures up to 7 MPa and 100 °C, respectively. The experimental results showed CO2 solubility and rock dissolution to be the governing mechanism when CO2 was injected into carbonate cores. The permeability measurements showed that permeability increases by increasing injection pressure and decreases by increasing confining pressure and temperature. The IFT measurement results showed that the IFT decreases significantly when there is an increase in pressure and temperature.

Keywords: low permeable, carbonate reservoirs, CO2 sequestration, saline aquifer, Iranian reservoirs, IFT of CO2/Brine
Published online
2019-10-10
How to Cite
Afkhami Karaei, M., Honarvar, B., Azdarpour, A. and Mohammadian, E. “CO2 Storage in Low Permeable Carbonate Reservoirs: Permeability and Interfacial Tension (IFT) Changes During CO2 Injection in an Iranian Carbonate Reservoir”, Periodica Polytechnica Chemical Engineering. doi: https://doi.org/10.3311/PPch.14498.
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Articles