Article
Energy & Fuels
Moataz Mansi, Mohamed Almobarak, Christopher Lagat, Quan Xie
Summary: Development of shale gas reservoirs is the fastest growing area due to potential reserves. CO2 injection into shale reservoirs initiates enhanced gas recovery and CO2 sequestration, but there are uncertainties due to heterogeneity and complexity. This study aims to provide a practical screening tool to manage and predict the efficiency of enhanced gas recovery and CO2 sequestration in shale reservoirs.
Article
Thermodynamics
Chao Tang, Wen Zhou, Zhangxin Chen, Jiabao Wei
Summary: Shale gas is an important unconventional fossil fuel resource. Carbon capture and sequestration in shale gas reservoirs, known as CO2-EGR, can sequester 45%-60% of injected CO2 in the shale reservoir while providing 10%-15% incremental gas recovery. Factors such as formation temperature, mean pore size, and injection rate greatly impact the feasibility of CO2-EGR.
Article
Engineering, Environmental
Sen Wang, Xinyu Yao, Qihong Feng, Farzam Javadpour, Yuxuan Yang, Qingzhong Xue, Xiaofang Li
Summary: This study investigates the competitive adsorption between CO2 and hydrocarbon components in shales, as well as the recovery mechanisms of CO2 huff-n-puff in kerogenic circular nanopores. The study reveals that different pore geometries and compositions significantly impact gas adsorption and recovery behaviors, highlighting the importance of using realistic shale kerogen models. Additionally, increasing pore size improves gas recovery during pressure drawdown but limits the effectiveness of CO2 injection, leading to an overall increase in gas recovery and CO2 sequestration efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Qi Liao, Junping Zhou, Xuefu Xian, Kang Yang, Chengpeng Zhang, Zhiqiang Dong, Hong Yin
Summary: This study measured the adsorption of pure and binary CO2 and CH4 in shale using the volumetric method. The results showed that CO2 was preferentially adsorbed in shale, and the adsorption amount of binary CO2/CH4 increased with the increase of CO2 composition. The selectivity factor of CO2 over CH4 was closely related to pressure and CO2/CH4 concentration, and the injection strategy of CO2 can be optimized based on the results.
Article
Engineering, Chemical
Kaiqiang Zhang, Zhijun Jin, Gensheng Li, Quanyou Liu, Leng Tian
Summary: Understanding gas adsorptions in porous media is crucial for academic research and industrial applications. This study specifically investigates the adsorption of methane and carbon dioxide on different minerals and evaluates their effects on reservoir productions and carbon storage processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shihao Wang, Hongwei Zhang, Bikai Jin, Rui Qiao, Xian-Huan Wen
Summary: This study investigates the capillary condensate trapping mechanism that causes the differential release phenomenon in unconventional reservoirs using molecular dynamics simulations. The results show that light components release faster than heavy components during primary depletion, leading to an increased gas oil ratio. The heavier hydrocarbons accumulate in the nano-channel due to confinement, while light hydrocarbons remain in dead-end pores. Gas injection enhances the recovery of trapped hydrocarbons. This study has practical implications for enhanced oil recovery operations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Danqing Liu, Yilian Li, Seng Yang, Ramesh K. Agarwal
Summary: CO2 enhanced shale gas recovery technology is still in a preliminary stage globally, but it has huge development potential and wide application prospects aimed at addressing the dual issues of energy crisis and environmental problems, requiring further research and development.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
Xiaolin Bao, Alfonso Fragoso, Roberto Aguilera
Summary: The objective of this paper is to discuss the utilization and storage of CO2 and H2, as well as the application of huff and puff (H&P) gas injection for increased oil recovery. The study focuses on underground hydrogen utilization and storage (UHUS) in shale oil reservoirs and its potential contribution to achieving net zero emissions. The results show that H&P gas injection can significantly enhance oil recovery, with the possibility of application in other shale reservoirs as well, thanks to geologic containment.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Energy & Fuels
Jianfa Wu, Haoran Hu, Cheng Chang, Deliang Zhang, Jian Zhang, Shengxian Zhao, Bo Wang, Qiushi Zhang, Yiming Chen, Fanhua Zeng
Summary: This work investigates the performance of injecting different gases to enhance shale gas recovery and CO2 geological storage efficiency using fractured shale cores under real reservoir conditions. The adsorption process of shale to different gases follows the extended-Langmuir model, with CO2 showing the highest adsorption capacity, followed by CH4, and N-2 having the smallest adsorption capacity. Core flooding tests show that CO2 has a longer breakthrough time compared to N-2, and the recovery factor for CH4 at the breakthrough time is higher for CO2 injection. The storage efficiency of CO2 also increases with increasing CO2 concentration.
FRONTIERS IN ENERGY
(2023)
Article
Energy & Fuels
Humera Ansari, Shuwei Gong, J. P. Martin Trusler, Geoffrey Maitland, Ronny Pini
Summary: This study presents a hybrid pore-scale model for gas adsorption in shale, using surrogate surfaces to simulate the behavior. The reliability of the model is verified through comparisons with experimental data. The proposed model can reduce the experimental burden and has general applicability.
Review
Energy & Fuels
Athumani Omari, Chao Wang, Yang Li, Xingguang Xu
Summary: Due to the combined advantages of CO2 injection for boosting natural gas recovery efficiency and sequestration of CO2 in depleted shale gas reservoirs, the enhanced gas recovery (EGR) approach has gained attention. This paper reviews numerous published studies to analyze the viability of this technique. The studies show that CO2 injected into shales is adsorbed on the rock matrix, resulting in CH4 desorption and additional gas recovery. The best fit adsorption models and the impact of geological and petrophysical factors on gas recovery are discussed. The findings emphasize the importance of factors like well spacing, fracture permeability, and injection pressure in effective field demonstration for CO2-EGR projects.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Kaiyi Zhang, Hao Jiang, Guan Qin
Summary: Water can suppress the adsorption of CO2 and CH4 when its content is high, but can enhance CO2/CH4 selectivity under certain circumstances. Kerogen shows a stronger preference for CO2 adsorption over CH4.
Article
Energy & Fuels
M. Akbarabadi, A. H. Alizadeh, M. Piri, N. Nagarajan
Summary: The significant amount of gas produced from unconventional reservoirs in the US in recent years has created an opportunity for using low-cost gas in enhanced oil recovery projects. Experimental and numerical studies have shown the great potential of using produced gas as an injectant for enhanced oil recovery from tight shale resources. The objective of this study is to investigate the feasibility of produced gas huff-and-puff operations in a major oil-producing shale formation in North America.
Article
Engineering, Environmental
Yingnan Wang, Zhehui Jin
Summary: The volume partitioning between nanopores and macropores/fractures has a significant effect on the CO2 'huff-n-puff' process in shale gas exploitation, impacting hydrocarbon adsorption, compositions, recovery, and CO2 storage accordingly.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Thermodynamics
Guangzhao Zhou, Xianggang Duan, Jin Chang, Yu Bo, Yuhan Huang
Summary: Understanding the competitive adsorption-desorption mechanisms in shale is crucial for improving CH4 recovery and CO2 sequestration. This study used nuclear magnetic resonance to investigate the impact of CO2 on the adsorption-desorption behaviors of CH4 in plug-sized samples. The results revealed distinct peaks in the transverse relaxation time (T2) spectrum, indicating the different states of adsorbed CH4 and free state CH4 in pores and fractures. The introduction of CO2 led to changes in the T2 signals, resulting in a higher desorption rate of adsorbed CH4.
Article
Engineering, Petroleum
Pal Ostebo Andersen, Yangyang Qiao, Dag Chun Standnes, Steinar Evje
Article
Engineering, Petroleum
Pal Ostebo Andersen, Arild Lohne, Arne Stavland, Aksel Hiorth, Bergit Brattekas
Article
Energy & Fuels
Pal Ostebo Andersen
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2019)
Article
Energy & Fuels
Pal Ostebo Andersen, Eirik K. Nesvik, Dag C. Standnes
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Hocine Ouaer, Amir Hossein Hosseini, Menad Nait Amar, Mohamed El Amine Ben Seghier, Mohammed Abdelfetah Ghriga, Narjes Nabipour, Pal Ostebo Andersen, Amir Mosavi, Shahaboddin Shamshirband
APPLIED SCIENCES-BASEL
(2020)
Article
Energy & Fuels
Amin Bemani, Alireza Baghban, Amir H. Mohammadi, Pal Ostebo Andersen
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Menad Nait Amar, Mohammed Abdelfetah Ghriga, Hocine Ouaer, Mohamed El Amine Ben Seghier, Binh Thai Pham, Pal Ostebo Andersen
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Emanuela Kallesten, Pal Ostebo Andersen, Merete Madland, Reidar Korsnes, Edvard Omdal, Udo Zimmermann
Article
Energy & Fuels
Dhruvit S. Berawala, Pal O. Andersen
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Pal O. Andersen, Yingfang Zhou
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2020)
Article
Energy & Fuels
Pal ostebo Andersen, Jan Inge Nygard, Aizhan Kengessova
Summary: This study tackles the challenge of predicting the oil recovery factor in layered heterogeneous reservoirs after different injection methods. Through the analysis of a dataset of reservoir simulations, the study finds strong correlations between the water-oil and gas-oil mobility ratios and the recovery factor. By training an LSSVM model with different optimizers, accurate predictions of the recovery factor can be achieved.
Article
Energy & Fuels
Pal Ostebo Andersen, Liva Salomonsen, Dagfinn Sondenaa Sleveland
Summary: This study investigates forced and spontaneous imbibition of water to displace oil in strongly water-wet sandstone samples. The experiments show that capillary and advective forces play vital roles in the imbibition process under different conditions. The numerical simulations consistently match the experimental observations and provide insights into the pressure and recovery behavior in strongly water-wet systems.
Editorial Material
Energy & Fuels
Pal Ostebo Andersen
Article
Engineering, Petroleum
Pal Ostebo Andersen, Dhruvit Satishchandra Berawala