Quantitative experimental investigation of multiple P-T effects on primary drainage process during scCO2 storage in deep saline aquifers

Li, Yang; Suo, Ruiting; Li, Xufeng; Hu, Lisha; Gao, Pengyu; Zhao, Shiyu; Zhang, Zhaodi

doi:10.1016/j.jhydrol.2021.126143

Cited by 10 publications

(2 citation statements)

References 28 publications

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“…Salt deposition occurs when the initial salinity of formation water is high (Zeidouni et al, 2009;Spycher and Pruess, 2010;André et al, 2014;Miri et al, 2014;Peysson et al, 2014;Tang et al, 2015;Miri et al, 2015;Jeddizahed and Rostami, 2016;Tang et al, 2021b). However, the study of salt deposition mainly focuses on the process of CO 2 geological sequestration (Kim et al, 2013;Cui et al, 2018;Li et al, 2021;Zhao et al, 2021). However, there are few studies on the changes of production capacity and storage capacity due to formation water evaporation after multi-cycle production of UGS.…”

Section: Introductionmentioning

confidence: 99%

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

Zhongxin,

Xiaoping,

Dawei

et al. 2024

Front. Earth Sci.

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Underground gas storage (UGS) is the most economical and effective means to guarantee stable gas supply. During gas production process, the evaporation of formation water leads to the increase of water content in the gas, and the salinity of the remaining formation water increases. This work applied numerical simulation to analyze the effect of salt deposition on flowing bottomhole pressure, production capacity and storage capacity. The simulation results show that the minimum and maximum pressure of UGS is more likely to be reached during multi-cycle production under the conditions of salt deposition. Under the initial water condition, reservoir drying can improve the gas storage capacity. At the end of the tenth cycle, the storage capacity increases by 1.4%. It is concluded that the study on the impact of formation water evaporation on storage capacity is helpful for the prevention and control of salt formation water in UGS with high salinity.

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Section: Introductionmentioning

confidence: 99%

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

Zhongxin,

Xiaoping,

Dawei

et al. 2024

Front. Earth Sci.

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“…Geological storage of CO 2 is widely recognized as an important way to reduce atmospheric CO 2 contents (Zhou and Zeng, 2014;Oh et al, 2019;Xu et al, 2020;Mikunda et al, 2021;Moore et al, 2021;Sun et al, 2021;Wen et al, 2021). Due to the wide distribution of deep saline aquifers and their huge capacity for CO 2 storage, deep saline aquifers are considered as a preferred place among others (Li et al, 2016(Li et al, , 2021Han et al, 2019). In deep saline aquifers, CO 2 storage mechanisms mainly include stratigraphic and structural, hydrodynamic, capillary or residual, dissolution and mineralization trapping (Li et al, 2017;Amarasinghe et al, 2021;Yekeen et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

A Numerical Simulation Study of Temperature and Pressure Effects on the Breakthrough Pressure of CO₂ in Unsaturated Low‐permeability Rock Core

et al. 2023

Acta Geologica Sinica (Eng)

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Gas breakthrough pressure is a key parameter to evaluate the sealing capacity of caprock, and it also plays important roles in safety and capacity of CO2 geological storage. Based on the published experimental results, we present numerical simulations on CO2 breakthrough pressure in unsaturated low‐permeability rock under 9 multiple P‐T conditions (which can keep CO2 in gaseous, liquid and supercritical states) and thus, a numerical method which can be used to accurately predict CO2 breakthrough pressure on rock‐core scale is proposed. The simulation results show that CO2 breakthrough pressure and breakthrough time are exponential correlated with P‐T conditions. Meanwhile, pressure has stronger effects on experimental results than that of temperature. Moreover, we performed sensitivity studies on the pore distribution index λ (0.6, 0.7, 0.8, and 0.9) in van Genuchten‐Muale model. Results show that with the increase of λ, CO2 breakthrough pressure and breakthrough time both show decreasing trends. In other words, the larger the value of λ is, the better the permeability of the caprock is, and the worse the CO2 sealing capacity is. The numerical method established in this study can provide an important reference for the prediction of gas breakthrough pressure on rock‐core scale and for related numerical studies.

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Core‐flooding experiments of various concentrations of CO₂/N₂ mixture in different rocks: II. Effect of rock properties on residual water

Li,

et al. 2024

Greenhouse Gases

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During CO2 storage in deep saline aquifers, the presence of residual water has an important influence on the storage efficiency and safety. In this study, natural rock cores taken from deep reservoirs in the Ordos Basin and Fukang, Xinjiang are used as research objects. Nine groups of core‐flooding experiments are performed under different CO2/N2 gas mixture ratios to study the influence of rock properties (mineral composition, permeability, porosity and pore structure) on the residual water. Furthermore, the geophysical and chemical properties of rock cores are analyzed by X‐ray diffraction, electron microscopy, field emission scanning electron microscopy and piezoelectric mercury method. The results show that residual water saturation is a quantitative power function of drainage time. The residual water saturation is positively correlated with the total amount of quartz and feldspar and increases with increasing permeability. Moreover, both the average and median pore throat radius show a strong inverse correlation with irreducible residual water saturation; as these radius increase, the residual water saturation decreases. In contrast, the porosity and maximum pore throat radius display a weaker correlation with irreducible residual water saturation. This study is of great value for engineering practices such as the site selection of CO2 storage projects in saline aquifer and improvement of CO2 storage efficiency. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Quantitative experimental investigation of multiple P-T effects on primary drainage process during scCO2 storage in deep saline aquifers

Cited by 10 publications

References 28 publications

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

A Numerical Simulation Study of Temperature and Pressure Effects on the Breakthrough Pressure of CO₂ in Unsaturated Low‐permeability Rock Core

Core‐flooding experiments of various concentrations of CO₂/N₂ mixture in different rocks: II. Effect of rock properties on residual water

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Quantitative experimental investigation of multiple P-T effects on primary drainage process during scCO2 storage in deep saline aquifers

Cited by 10 publications

References 28 publications

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

Study of the effect of salt deposition on production capacity and storage capacity in underground gas storage

A Numerical Simulation Study of Temperature and Pressure Effects on the Breakthrough Pressure of CO2 in Unsaturated Low‐permeability Rock Core

Core‐flooding experiments of various concentrations of CO2/N2 mixture in different rocks: II. Effect of rock properties on residual water

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A Numerical Simulation Study of Temperature and Pressure Effects on the Breakthrough Pressure of CO₂ in Unsaturated Low‐permeability Rock Core

Core‐flooding experiments of various concentrations of CO₂/N₂ mixture in different rocks: II. Effect of rock properties on residual water