Molecular Investigation on the Displacement Characteristics of CH4 by CO2, N2 and Their Mixture in a Composite Shale Model

被引:18
作者
Gong, Liang [1 ]
Zhang, Yuan [1 ]
Li, Na [1 ]
Gu, Ze-Kai [1 ]
Ding, Bin [1 ]
Zhu, Chuan-Yong [1 ]
机构
[1] China Univ Petr East China, Coll New Energy, Qingdao 266580, Peoples R China
基金
中国国家自然科学基金;
关键词
composite shale model; displacement; molecular simulations; shale gas; injection gases; CARBON-DIOXIDE; GAS RECOVERY; COMPETITIVE ADSORPTION; METHANE ADSORPTION; DENSITY; PORE; SIMULATIONS; INJECTION; INSIGHTS; NITROGEN;
D O I
10.3390/en14010002
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The rapid growth in energy consumption and environmental pollution have greatly stimulated the exploration and utilization of shale gas. The injection of gases such as CO2, N-2, and their mixture is currently regarded as one of the most effective ways to enhance gas recovery from shale reservoirs. In this study, molecular simulations were conducted on a kaolinite-kerogen IID composite shale matrix to explore the displacement characteristics of CH4 using different injection gases, including CO2, N-2, and their mixture. The results show that when the injection pressure was lower than 10 MPa, increasing the injection pressure improved the displacement capacity of CH4 by CO2. Correspondingly, an increase of formation temperature also increased the displacement efficiency of CH4, but an increase of pore size slightly increased this displacement efficiency. Moreover, it was found that when the proportion of CO2 and N-2 was 1:1, the displacement efficiency of CH4 was the highest, which proved that the simultaneous injection of CO2 and N-2 had a synergistic effect on shale gas production. The results of this paper will provide guidance and reference for the displacement exploitation of shale gas by injection gases.
引用
收藏
页数:13
相关论文
共 34 条
[1]   Injection of mixture of shale gases in a nanoscale pore of graphite and their displacement by CO2/N2 gases using molecular dynamics study [J].
Akbarzadeh, Hamed ;
Abbaspour, Mohsen ;
Salemi, Sirous ;
Akbari, Mahnaz .
JOURNAL OF MOLECULAR LIQUIDS, 2017, 248 :439-446
[2]   Experimental study on kinetic swelling of organic-rich shale in CO2, CH4 and N2 [J].
Chen, Tianyu ;
Feng, Xia-Ting ;
Pan, Zhejun .
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2018, 55 :406-417
[3]   Nanopores to megafractures: Current challenges and methods for shale gas reservoir and hydraulic fracture characterization [J].
Clarkson, C. R. ;
Haghshenas, B. ;
Ghanizadeh, A. ;
Qanbari, F. ;
Williams-Kovacs, J. D. ;
Riazi, N. ;
Debuhr, C. ;
Deglint, H. J. .
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING, 2016, 31 :612-657
[4]   A Review of Gas Injection in Shale Reservoirs: Enhanced Oil/Gas Recovery Approaches and Greenhouse Gas Control [J].
Du, Fengshuang ;
Nojabaei, Bahareh .
ENERGIES, 2019, 12 (12)
[5]   Investigation of CO2-CH4 Displacement and Transport in Shale for Enhanced Shale Gas Recovery and CO2 Sequestration [J].
Du, Xi-Dong ;
Gu, Min ;
Duan, Shuo ;
Xian, Xue-Fu .
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME, 2017, 139 (01)
[6]   Enhanced Shale Gas Recovery by the Injections of CO2, N2, and CO2/N2 Mixture Gases [J].
Du, Xidong ;
Gu, Min ;
Liu, Zhenjian ;
Zhao, Yuan ;
Sun, Fulong ;
Wu, Tengfei .
ENERGY & FUELS, 2019, 33 (06) :5091-5101
[7]   The Influences of CO2 Injection Pressure on CO2 Dispersion and the Mechanism of CO2-CH4 Displacement in Shale [J].
Du, Xidong ;
Gu, Min ;
Duan, Shuo ;
Xian, Xuefu .
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME, 2018, 140 (01)
[8]   Moving beyond forensic monitoring to understand and manage impacts of hydraulic fracturing for oil and gas development [J].
Dzombak, David A. .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (52) :13145-13147
[9]   Enhanced Gas Recovery and CO2 Storage in Gas Shales: A Summary Review of its Status and Potential [J].
Godec, Michael ;
Koperna, George ;
Petrusak, Robin ;
Oudinot, Anne .
12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12, 2014, 63 :5849-5857
[10]   Effect of pore pressure distribution on fracture behavior of sandstone in nitrogen fracturing [J].
Hou, Peng ;
Gao, Feng ;
Gao, Yanan ;
Yang, Yugui ;
Cai, Chengzheng .
ENERGY EXPLORATION & EXPLOITATION, 2017, 35 (05) :609-626