Article
Energy & Fuels
Zheng Liu, Baojiang Sun, Zhiyuan Wang, Jianbo Zhang, Xuerui Wang
Summary: A model was established to predict the risk of hydrate reformation in production pipelines during offshore gas hydrate development, studying the region and higher-risk drainage pipe. A new hydrate management strategy by adding additional pumps and heaters was proposed to effectively address potential hydrate reformation risks.
Article
Thermodynamics
Jiaxin Sun, Fanfan Qin, Fulong Ning, Yuhang Gu, Yanlong Li, Xinxin Cao, Peixiao Mao, Tianle Liu, Shunbo Qin, Guosheng Jiang
Summary: By comparing the production behaviors of different well pattern designs through numerical simulation, the optimal well spacing was determined. The results showed that a relatively longer well spacing in homogeneous sediments with the same ultra-low permeability leads to lower cumulative gas recovery, but the opposite is observed after increasing the formation permeability. The exponential model can describe the relationship between cumulative gas recovery and well spacing, and the minimum radius of curvature method can be used to determine the optimal well spacing. For relatively high-permeability reservoirs confined by ultra-low permeability burdens, gas recovery increases in both well patterns, but this stimulation may gradually weaken in the long-term production. The ideal well spacing can be suggested by comparing the cumulative gas recovery during each stage, providing valuable reference for future applications.
Article
Engineering, Chemical
Mohsen Sadeghi, Shuo Li, Enzu Zheng, Somasekhara Goud Sontti, Payman Esmaeili, Xuehua Zhang
Summary: The transport of monodisperse and bimodal particles in a turbulent non-Newtonian carrier was investigated using a CFD model and granular kinetic theory. The study found that the mixture velocity had the most significant effect on pressure drop and radial solids distribution. Increasing the mixture velocity or solids concentration led to a larger pressure drop, primarily due to intensified particle-wall and particle-particle interactions. Higher solids concentration and lower mixture velocity resulted in lower specific energy consumption.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Thermodynamics
Xuewen Cao, Kairan Yang, Tingting Li, Ni Xiong, Wen Yang, Jiang Bian
Summary: This study develops a mathematical model to describe the turbulent gas-liquid-hydrate multiphase flow system in pipelines during natural gas production, analyzing the effects of gas flow velocity, slurry flow velocity, hydrate volume fraction, and pipeline inclination on flow pattern and particle size distribution. The study also discusses particle behaviors during the transition from stratified flow to slug flow, and indicates that increasing hydrate volume fraction and slurry flow velocity can lead to flow pattern transition and intensified particle agglomeration.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Rupeng Wei, Yongqiang Xia, Zifei Wang, Qingping Li, Xin Lv, Shudong Leng, Lunxiang Zhang, Yi Zhang, Bo Xiao, Shengxiong Yang, Lei Yang, Jiafei Zhao, Yongchen Song
Summary: Recent field tests in Japan and China have attracted worldwide attention to marine gas hydrate reservoirs. To improve economic efficiency, a new scheme is proposed to jointly produce gases from the hydrate layer and its underlying shallow gas layer. The use of dual horizontal wells can significantly increase cumulative gas yield compared to a single vertical well scenario. However, there is a potential risk of interlayer failure due to pressure differences, which can be mitigated by controlling the depressurization scheme in different layers. An analysis shows promising positive energy harvest and suggests its potential application in field tests in the South China Sea without disturbing reservoir stability.
Article
Energy & Fuels
Arnold Landjobo Pagou, Xiao Guo, Long Peng, Virginie Gueyap Kamdem, Fatoumata Attaherou Toure, Abdoulaye Akhayie Mamat
Summary: This study introduces a model based on each phase's two-layer approach and momentum balance equation to evaluate the transportability of solid particles (such as NGH) in horizontal tubing. Through evaluation and comparison with experimental and offshore field datasets, the proposed model is found to have the highest prediction accuracy and precision.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Lin Yang, Jianliang Ye, Xuwen Qin, Qianyong Liang, Xuemin Wu
Summary: The permeability of overlying and underlying strata has little effect on gas production rates in the early stage of hydrate production; in long-term production, hydrate deposits with lower permeability in overlying and underlying strata result in higher cumulative gas production and gas-water ratio.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Qingchao Li, Difei Zhao, Junkai Yin, Xingyu Zhou, You Li, Peng Chi, Ying Han, Ubedullah Ansari, Yuanfang Cheng
Summary: Effective production of natural gas from hydrate-bearing sediments through various strategies is crucial in addressing the current global energy crisis. However, the dissociation of hydrates during gas production can weaken sediment strength and impact reservoir stability. This study thoroughly analyzed gas production, reservoir characteristics, and sediment deformation using the ABAQUS platform. The findings provide insights into the potential for commercial gas hydrate development and lay the groundwork for developing engineering measures to mitigate geological disasters in the hydrate production process.
NATURAL RESOURCES RESEARCH
(2023)
Article
Thermodynamics
Yanlong Li, Nengyou Wu, Deli Gao, Qiang Chen, Changling Liu, Daoyong Yang, Yurong Jin, Fulong Ning, Mingjian Tan, Gaowei Hu
Summary: Horizontal wells are preferred for marine NGH production, but face challenges such as a narrow safe operational window and high fluid-loss ratio. The safety and effectiveness of completion operations are mainly affected by hydrate saturation in the reservoir.
Article
Energy & Fuels
Jihao Pei, Zhiyuan Wang, Jianbo Zhang, Binbin Zhang, Nan Ma, Baojiang Sun
Summary: In this study, a new hydrate formation model is developed for reduced-diameter pipes in deep-water gas production and transportation. The model takes into account the throttling effect and uneven thickness distributions of the liquid film on the wall. By solving the deposition velocities of hydrate particles and considering the shedding process of the hydrate layer, the thickness of the deposition layer and blockage time can be accurately predicted. The study establishes a theoretical basis for predicting and preventing hydrate risks in gas transportation pipelines with complex structures.
Article
Engineering, Chemical
Jai Krishna Sahith Sayani, Vinayagam Sivabalan, Khor Siak Foo, Srinivasa Rao Pedapati, Bhajan Lal
Summary: An artificial intelligence model is developed to accurately predict the gas hydrate formation rate and reaction kinetics in multiphase transmission pipelines. The multilayer perceptron (MLP) model demonstrates higher prediction accuracy.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Tinghui Wan, Zhanzhao Li, Yanjiang Yu, Qianyong Liang, Hongfeng Lu, Jingli Wang
Summary: The impact of the placement of horizontal well section, length, and production system on productivity of horizontal well in depressurization exploitation was analyzed using numerical simulation method. The results showed that the best performance of production capacity could be achieved when the horizontal section was placed in layer II, and the heating effect significantly improved productivity. The combination of depressurization and heating increased gas production significantly.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Environmental
Rui Ma, Senbo Xiao, Yuanhao Chang, Yuequn Fu, Jianying He, Zhiliang Zhang
Summary: This study investigates the mechanisms and influencing factors of hydrate adhesion using molecular dynamics simulations. It is found that enriching gas content near solid surfaces is crucial for reducing hydrate adhesion strength and enabling automatic detachment. The results provide insights for the design of passive anti-hydrate surfaces using an interfacial gas-enrichment strategy (IGES).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Yuqi Wu, Pejman Tahmasebi, Keyu Liu, Chengyan Lin, Serveh Kamrava, Shengbiao Liu, Samuel Fagbemi, Chang Liu, Rukuai Chai, Senyou An
Summary: This study proposes a novel hybrid modeling approach integrating X-ray CT imaging technology, morphological operation algorithm, and quartet structure generation set method to investigate the dependence of the physical properties of hydrate-bearing sediments (HBS) on hydrate occurrence patterns and saturation levels. The findings suggest that different hydrate types have varying heterogeneity in the distribution of pore and throat radii.
Review
Energy & Fuels
Salma Elhenawy, Majeda Khraisheh, Fares Almomani, Mohammad A. Al-Ghouti, Mohammad K. Hassan, Ala'a Al-Muhtaseb
Summary: Gas hydrate blockage is a major issue in the oil/gas industry, causing significant financial losses and safety risks. To tackle this issue, physical methods and chemical inhibitors are used. Physical methods involve thermal heating and depressurization, while chemical inhibitors are classified into high dosage and low dosage. This study discusses the application of these methods and inhibitors.
Article
Energy & Fuels
Zhiyuan Wang, Yang Zhao, Jianbo Zhang, Shaowei Pan, Jing Yu, Baojiang Sun
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2018)
Article
Engineering, Petroleum
Zhiyuan Wang, Yang Zhao, Jianbo Zhang, Xuerui Wang, Jing Yu, Baojiang Sun
Article
Engineering, Environmental
Baojiang Sun, Shaowei Pan, Jianbo Zhang, Xinxin Zhao, Yang Zhao, Zhiyuan Wang
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Energy & Fuels
Jiaming Geng, Jingyang Pu, Yang Zhao, Baihua Lin, Baojun Bai, Schuman P. Thomas
Article
Energy & Fuels
Haifeng Ding, Jiaming Geng, Yuanhang Lu, Yang Zhao, Baojun Bai
Article
Engineering, Petroleum
Yang Zhao, Jianqiao Leng, Baihua Lin, Mingzhen Wei, Baojun Bai
Summary: Polymer flooding is commonly used in oil recovery, but its effectiveness is reduced when channels are present in a reservoir. This study showed that injecting microgels to shut off channels can significantly improve polymer-flooding efficiency and enhance oil recovery, especially in reservoirs with high-permeability channels.
Article
Energy & Fuels
Yang Zhao, Baojun Bai
Summary: Gel treatment has proven to be effective in attacking excessive water production in mature oilfields, but not all applications are successful. The effectiveness of gel treatment depends on the transport and placement behavior of gel materials in the reservoir. This study investigates the transport, placement, water-blocking ability, fluid diversion, and sweep improvement of microgels in reservoirs with superpermeable channels. The results show that microgel particles can selectively penetrate and shut off superpermeable channels under certain conditions, leading to improved sweep efficiency.
Article
Energy & Fuels
Yang Zhao, Mingzhen Wei, Jianqiao Leng, Baojun Bai
Summary: This study investigated the propagation behavior of micrometer-sized hydrogel particles in superpermeable channels and found that the particle-pore matching size relationship played a key role in the effectiveness of the technology. Specific pressure gradients were required for gel particle propagation in the channels, and this pressure gradient was influenced by the particle-to-pore matching size ratio.
Article
Energy & Fuels
Yang Zhao, Baojun Bai
Summary: This study identified the presence of threshold penetration pressure (Delta Pth) as responsible for selective penetration behavior of tested microgels. The concept of Delta Pth was used to determine favorable conditions for effective gel treatments.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Yang Zhao, Zhen-Hua Rui, Zheng Zhang, Si-Wei Chen, Ren-Feng Yang, Kai Du, Birol Dindoruk, Tao Yang, Erling H. Stenby, Malcolm A. Wilson
Summary: This study investigates the effectiveness of conformance treatments with CO2-resistant crosslinked polymer gels in mitigating CO2 channeling issue and promoting the synergy between enhanced oil recovery (EOR) and CO2 sequestration. The results demonstrate the importance of conformance treatment in maximizing the performance of CCUS-EOR process to achieve both oil recovery improvement and efficient carbon storage.
Article
Engineering, Petroleum
Tao Song, Mohamed Ahdaya, Shuda Zhao, Yang Zhao, Thomas Schuman, Baojun Bai
Summary: This paper presents a comprehensive laboratory evaluation of a novel water-swellable high-temperature resistant hyperbranched recrosslinkable preformed particle gel (HT-BRPPG), designed for North Sea high-temperature sandstone reservoirs. The results showed that the HT-BRPPG had good swelling kinetics, long-term thermal stability, and plugging performance, making it an effective solution for improving the conformance of high-temperature reservoirs with large fractures or void space conduits.
Article
Engineering, Petroleum
Yang Zhao, Shize Yin, Randall S. Seright, Samson Ning, Yin Zhang, Baojun Bai
Summary: The combination of low-salinity water and polymer flooding has been proposed as a method to enhance heavy-oil recovery on the Alaska North Slope. The synergy between LSW and polymer flooding improves recovery rates, with the low-salinity effect contributing to increased oil extraction efficiency.
Proceedings Paper
Engineering, Ocean
Zhiyuan Wang, Xuerui Wang, Baojiang Sun, Xuejing Deng, Yang Zhao, Yonghai Gao, Hao Li
PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 8
(2017)
Article
Thermodynamics
Xuerui Wang, Zhiyuan Wang, Xuejing Deng, Baojiang Sun, Yang Zhao, Weiqi Fu
APPLIED THERMAL ENGINEERING
(2017)
