scholarly journals Study of CO2 Enhancing Shale Gas Recovery Based on Competitive Adsorption Theory

ACS Omega ◽  
2020 ◽  
Vol 5 (36) ◽  
pp. 23429-23436
Author(s):  
Ying Sun ◽  
Shuxia Li ◽  
Renyuan Sun ◽  
Xiaoqiang Liu ◽  
Hui Pu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Competitive Adsorption ◽  
Adsorption Theory ◽  
Gas Recovery

Characterization of CO2/CH4 Competitive Adsorption in Various Clay Minerals in Relation to Shale Gas Recovery from Molecular Simulation

2019 ◽  
Vol 33 (9) ◽  
pp. 8202-8214 ◽  
Author(s):  
Xiaofei Hu ◽  
Hucheng Deng ◽  
Chang Lu ◽  
Yuanyuan Tian ◽  
Zhehui Jin
Keyword(s):  
Clay Minerals ◽  
Molecular Simulation ◽  
Shale Gas ◽  
Competitive Adsorption ◽  
Gas Recovery

scholarly journals Thermodynamics and Kinetics of CO2/CH4 Adsorption on Shale from China: Measurements and Modeling

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 978 ◽  
Author(s):  
Yuan Chi ◽  
Changzhong Zhao ◽  
Junchen Lv ◽  
Jiafei Zhao ◽  
Yi Zhang
Keyword(s):  
Partial Pressure ◽  
Shale Gas ◽  
Competitive Adsorption ◽  
Co2 Adsorption ◽  
Displacement Effect ◽  
Gas Recovery ◽  
Thermodynamics And Kinetics ◽  
Adsorption Behaviors ◽  
Ch4 Adsorption ◽  
Kinetics Of

CO2-enhanced shale gas recovery (CO2-ESGR) sequestrates anthropogenic CO2 and improves the profitability of shale gas exploitation. This work investigated the adsorption behaviors of CO2 and CH4 on shale from China at 20, 40, 60 and 80 °C. The pressure ranges for CO2 and CH4 were 1–5 and 1–15 MPa, respectively. The excess adsorbed amount of CH4 increased with increasing pressure from the beginning to the end, while the maximum excess CO2 adsorption was observed at approximately 4 MPa. The absolute average deviations (AADs) of CO2 and CH4, determined by the Langmuir + k model, were 2.12–3.10% and 0.88–1.11%, respectively. Relatively good adsorptivity for CO2 was exhibited when the pressure was less than 5 MPa, which was beneficial to the implementation of CO2-ESGR. With continuous increases in pressure, the adsorption capacity of CO2 was weaker than that of CH4, suggesting that the injected CO2 would reduce the partial pressure of CH4 for CO2-ESGR and the displacement effect would no longer be significant. In addition, the adsorption rate of CO2 was much faster than that of CH4. CO2 was more active in the competitive adsorption and it was advantageous to the efficiency of CO2-ESGR.

scholarly journals Study on Competitive Adsorption and Displacing Properties of CO2 Enhanced Shale Gas Recovery: Advances and Challenges

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Shuyang Liu ◽  
Baojiang Sun ◽  
Jianchun Xu ◽  
Hangyu Li ◽  
Xiaopu Wang
Keyword(s):  
Shale Gas ◽  
Adsorption Mechanism ◽  
Competitive Adsorption ◽  
Gas Adsorption ◽  
Organic Matter Content ◽  
Gas Production ◽  
Gas Recovery ◽  
Model Studies ◽  
Displacement Experiments ◽  
Adsorption Of Co2

CO2 enhanced shale gas recovery (CO2-ESGR) draws worldwide attentions in recent years with having significant environmental benefit of CO2 geological storage and economic benefit of shale gas production. This paper is aimed at reviewing the state of experiment and model studies on gas adsorption, competitive adsorption of CO2/CH4, and displacement of CO2-CH4 in shale in the process of CO2-ESGR and pointing out the related challenges and opportunities. Gas adsorption mechanism in shale, influencing factors (organic matter content, kerogen type, thermal maturity, inorganic compositions, moisture, and micro/nano-scale pore), and adsorption models are described in this work. The competitive adsorption mechanisms are qualitatively ascertained by analysis of unique molecular and supercritical properties of CO2 and the interaction of CO2 with shale matrix. Shale matrix shows a stronger affinity with CO2, and thus, adsorption capacity of CO2 is larger than that of CH4 even with the coexistence of CO2-CH4 mixture. Displacement experiments of CO2-CH4 in shale proved that shale gas recovery is enhanced by the competitive adsorption of CO2 to CH4. Although the competitive adsorption mechanism is preliminary revealed, some challenges still exist. Competitive adsorption behavior is not fully understood in the coexistence of CO2 and CH4 components, and more experiment and model studies on adsorption of CO2-CH4 mixtures need to be conducted under field conditions. Coupling of competitive adsorption with displacing flow is key factor for CO2-ESGR but not comprehensively studied. More displacement experiments of CO2-CH4 in shale are required for revealing the mechanism of flow and transport of gas in CO2-ESGR.

Hydrocarbon mixture and CO2 adsorptions in A nanopore-bulk multiscale system in relation to CO2 enhanced shale gas recovery

2021 ◽  
Vol 415 ◽  
pp. 128398
Author(s):  
Yingnan Wang ◽  
Zhehui Jin
Keyword(s):  
Shale Gas ◽  
Hydrocarbon Mixture ◽  
Gas Recovery

Mechanisms of shale water wettability alteration with chemical groups after CO2 injection: Implication for shale gas recovery and CO2 geo-storage

2021 ◽  
Vol 90 ◽  
pp. 103922
Author(s):  
Yiyu Lu ◽  
Rongrong Tian ◽  
Wenchuan Liu ◽  
Jiren Tang ◽  
Honglian Li ◽  
...  
Keyword(s):  
Shale Gas ◽  
Wettability Alteration ◽  
Co2 Injection ◽  
Gas Recovery ◽  
Water Wettability ◽  
Chemical Groups

scholarly journals A Fully Coupled Numerical Model for Microwave Heating Enhanced Shale Gas Recovery

Energies ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1608 ◽  
Author(s):  
Jia Liu ◽  
Jianguo Wang ◽  
Chunfai Leung ◽  
Feng Gao
Keyword(s):  
Numerical Model ◽  
Microwave Heating ◽  
Shale Gas ◽  
Gas Recovery ◽  
Coupled Numerical Model ◽  
Fully Coupled
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