Article
Energy & Fuels
Wang Weiyang, Zhou Chenru, Liu Chenwei, Wang Zhiyuan, Li Mingzhong
Summary: This study experimentally investigated the interaction behaviors of hydrate particle-particle/droplet and hydrate deposition-pipe wall in the cyclopentane vapor phase. It found that hydrate formation in the vapor phase is a fast-growing process with rough particle surfaces exhibiting strong hydrophilic characteristics. The adhesion forces between hydrate particles in the vapor phase slightly increase with temperature and are approximately 2-3 times higher than in the liquid cyclopentane phase. In the case of hydrate deposition, the adhesion strengths increase with substrate roughness and formation/annealing time, but decrease with temperature.
Review
Environmental Sciences
Haotian Liu, Linsen Zhan, Hailong Lu
Summary: The mechanisms for methane migration in marine sediments, including diffusion and advection processes, have not been well reviewed yet. The presence of natural gas hydrate affects methane migration by reducing permeability, enhancing geomechanical strength, and constructing hydrate channels. Dissolved methane faces high consumption rates, while free methane gas is hindered by capillary force. Methane discharge along fractures or failure surfaces is considerable, and gas flow through hydrate channels is difficult to constrain.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Environmental
Changrui Shi, Huiquan Liu, Lunxiang Zhang, Mingjun Yang, Yongchen Song, Jiafei Zhao, Zheng Ling
Summary: Sluggish formation kinetics is a challenge for the practical application of gas hydrate-based technologies. Carbon monoliths with controlled surface functional groups enhance the nucleating ability of methane hydrates. Carbonyl oxygen is identified as the most effective functional group in reducing induction time and enhancing formation kinetics. The turned hydrogen bonds near the CBCM surface contribute to the enhanced formation kinetics. Optimized carbonyl oxygen in CBCM significantly improves methane hydrate formation kinetics and storage capacity with outstanding cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Amin Hosseini Zadeh, Ijung Kim, Seunghee Kim
Summary: Hydrate-based CO2 sequestration (HBCS) is a new method to store large amounts of CO2 in geological sediments as crystalline solids. This study investigates the characteristics and kinetics of CO2 hydrate formation and dissociation under different conditions. The results suggest that hydrate nucleation and growth are limited in a porous medium due to solid particles, limited CO2 mass transfer, and heat transfer. Limited CO2 diffusion, hydrate nucleation, and better protection of hydrates are key factors for successful formation in the porous medium.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Article
Energy & Fuels
Huiru Sun, Bingbing Chen, Weixin Pang, Yongchen Song, Mingjun Yang
Summary: The change in water-gas flowrate ratio is a major cause of plugging in natural gas hydrate (NGH) exploitation, affecting gas production efficiency. This study used two sizes of reactors to observe the hydrate re-formation process and found that it was the main factor for plugging. Additionally, a faster water phase velocity resulted in more hydrate re-formation.
Article
Engineering, Chemical
Haodong Chen, Ming Luo, Donglei Jiang, Yanhui Wu, Chuanhua Ma, Xin Yu, Miao Wang, Yupeng Yang, Hexing Liu, Yu Zhang
Summary: Research has been conducted on the wellbore hydrate formation area and deposition and plugging. The results showed that increasing the circulation rate, injection temperature, and drilling fluid viscosity can effectively reduce the formation region and subcooling of hydrates.
Article
Energy & Fuels
Marshall A. Pickarts, Sriram Ravichandran, Nur Aminatulmimi Ismail, Hannah M. Stoner, Jose Delgado-Linares, E. Dendy Sloan, Carolyn A. Koh
Summary: This study presents a conceptual model for gas hydrate formation during cold restart of non-surface active hydrocarbons. It discusses the mechanisms of phase separation and prolonged cooling that lead to rapid and confined gas hydrate growth upon restart. The experimental and theoretical results support the proposed model and offer new directions for gas hydrate research and analysis.
Article
Engineering, Chemical
Vinicius De Almeida, Eric Serris, Gianluca Lavalle, Ana Cameirao, Jean-Michel Herri, Emilie Abadie, Nicolas Lesage, Annie Fidel Dufour
Summary: In this work, the mechanisms of hydrate formation and plugging in oil-water systems are proposed based on flow loop tests. Experiments were conducted at different water cuts using Kerdane oil, water (with NaCl) and natural gas. Different instruments were used to identify flow patterns and detect the phase carrying hydrates. A model based on density measurement is proposed to calculate the fraction of hydrates flowing locally, and local accumulations of hydrates were observed leading to plugging.
CHEMICAL ENGINEERING SCIENCE
(2023)
Review
Polymer Science
Alsu Venerovna Fakhreeva, Vasily Viktorovich Nosov, Alexander Iosifovich Voloshin, Vladimir Anatolyevich Dokichev
Summary: This review discusses the types and applications of chemical inhibitors of gas hydrate formation in the oil and gas industry. It analyzes the development of new types of environmentally safe green kinetic hydrate inhibitors (KHIs) based on biopolymers. The article considers the structure, physicochemical properties, efficiency, and commercial prospects of polysaccharides in preventing and controlling gas hydrate formation. It also presents recent research on cost-effective, efficient, and biodegradable KHIs for industrial applications in the oil and gas industry.
Article
Energy & Fuels
Xu Chengyuan, Zhang Jingyi, Kang Yili, Xu Feng, Lin Chong, Yan Xiaopeng, Jing Haoran, Shang Xiangyu
Summary: The study utilized a coupled CFD-DEM method to simulate the formation process of fracture plugging zone and developed a photo-elastic system to model pressure evolution in the zone. The results showed that bridging probability is crucial in determining the formation and efficiency of fracture plugging zone, and critical concentrations were proposed as key indexes for loss control formula design. Additionally, the mesoscale force chain network was identified as a significant factor affecting pressure evolution and macroscopic strength in the zone.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Energy & Fuels
L. E. Shaofei, S. U. N. Jinsheng, B. A. Yingrui, L. Y. U. Kaihe, Zhang Shupei, X. U. Chengyuan, Cheng Rongchao, L. I. U. Fan
Summary: This article investigates the formation mechanisms of plugging zone and criteria for fracture plugging. It uses experiments and tests to study the formation process of the plugging zone and analyzes the composition and ratios of particles of different sizes. The research results show that the formation of the plugging zone undergoes a process from inertial flow to quasi-static flow, and the plugging zone is composed of fracture mouth plugging particles, bridging particles, and filling particles.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Thermodynamics
Huiru Sun, Bingbing Chen, Kehan Li, Yongchen Song, Mingjun Yang, Lanlan Jiang, Jinyue Yan
Summary: This study analyzes the factors influencing hydrate re-formation characteristics by simulating two-phase flow in hydrate sediment. The results show that temperature and pressure exhibit three stages of change in the water-dominated two-phase flow process. A lower effective sectional velocity of water enhances the hydrate re-formation process. Meanwhile, the gas phase impedes mass transfer on the water-hydrate interface and acts as a nucleation site to promote hydrate re-formation. The onset time of flow blockage is linearly positively correlated with the effective sectional velocity of water, but the amount of hydrate re-formation decreases with increasing velocity.
Article
Thermodynamics
Zhiming Liu, Yuxing Li, Wuchang Wang, Guangchun Song, Xinran Yu, Zhigang Li, Honghong Wang, Wensheng Xiao, Hongyan Wang
Summary: The study investigates the characteristics of hydrate formation in surfactant solutions, which is important for the industrial application of hydrate-based technologies. The results demonstrate the formation of hydrate spots in the liquid film and the migration of the liquid phase within the hydrate particles. The mechanisms of hydrate particle burst and the formation of concentric lines are proposed.
Article
Energy & Fuels
Huiru Sun, Bingbing Chen, Guojun Zhao, Yuechao Zhao, Mingjun Yang
Summary: Water-gas two-phase flow plays a crucial role in inducing methane hydrate decomposition, with higher water-gas flow rate ratio and faster depressurization rate leading to improved energy recovery and efficient avoidance of ice generation. The combination of piecewise depressurization with water-gas flow was identified as the most effective mode for gas recovery from hydrate reservoirs in the experimental scale.
Article
Green & Sustainable Science & Technology
Jianbo Zhang, Qian Sun, Zhiyuan Wang, Jintang Wang, Xiaohui Sun, Zheng Liu, Baojiang Sun, Jinsheng Sun
Summary: Models predicting hydrate formation and deposition in offshore natural gas hydrate trial production pipes were developed to estimate the risk of hydrate plugging. Recommendations include installing a heater in the gas pipe and injecting inhibitors to reduce the risk of blockages and prevent costs associated with prevention.
JOURNAL OF CLEANER PRODUCTION
(2021)
