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Effect of H_(2)S content on relative permeability and capillary pressure characteristics of acid gas/brine/rock systems:A review

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第6期14卷 2003-2033页

作者： Xiaoyan Zhang Qi Li Mathias Simon Guodong Zheng Yongsheng Tan State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China Department of Engineering Durham UniversityDurhamDH13LEUK Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou730000China

Geological storage of acid gas has been identified as a promising approach to reduce atmospheric carbon dioxide(CO_(2)),hydrogen sulfide(H_(2)S)and alleviate public concern resulting from the sour gas production.A good understanding of the relative permeability and capillary pressure characteristics is crucial to predict the process of acid gas injection and *** prediction of injection and redistribution of acid gas is important to determine storage capacity,formation pressure,plume extent,shape,and leakage ***,the existing experimental data and theoretical models were reviewed to gain a better understanding of the issue how the H_(2)S content affects gas density,gas viscosity,interfacial tension,wettability,relative permeability and capillary pressure characteristics of acid gas/brine/rock *** densities and viscosities of the acid gas with different H_(2)S mole fractions are both temperature-and pressure-dependent,which vary among the gas,liquid and supercritical ***/acid gas interfacial tension decreases strongly with increasing H_(2)S *** mica and clean quartz,water contact angle increases with increasing H_(2)S mole *** particular,wettability reversal of mica to a H_(2)S-wet behavior occurs in the presence of dense H_(2)*** capillary pressure increases with decreasing contact *** a given saturation,the relative permeability of a fluid is higher when the fluid is *** capillary pressure decreases with decreasing interfacial tension at a given ***,the existing datasets do not show a consistent link between capillary number and relative *** capillary pressure decreases with increasing H_(2)S mole ***,there is no consensus on the effect of the H_(2)S content on the relative permeability *** may be due to the limited availability of the relative permeability and capillary pressure data for acid gas/brine/rock systems;thus,more experimental measure

关键词： Acid gas geological sequestration Relative permeability Capillary pressure H_(2)S content wettability interfacial tension

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