Natural gas hydrate has huge reserves and is widely distributed in marine environment.Its commercial development is of great significance for alleviating the contradiction between energy supply and demand.As an effici...Natural gas hydrate has huge reserves and is widely distributed in marine environment.Its commercial development is of great significance for alleviating the contradiction between energy supply and demand.As an efficient research method,numerical simulation can provide valuable insights for the design and optimization of hydrate development.However,most of the current production models simplify the reservoir as a two-dimensional(2D)horizontal layered model,often ignoring the impact of formation dip angle.To improve the accuracy of production prediction and provide theoretical support for the optimization of production well design,two three-dimensional(3D)geological models with different dip angles based on the geological data from two typical sites are constructed.The vertical well,horizontal well and multilateral wells are deployed in these reservoirs with different permeabilities to perform production trial,and the sensitivity analysis of dip angles is also carried out.The short-term production behaviors in high and low permeability reservoirs with different dip angles are exhibited.The simulation results show that 1)the gas and water production behaviors for different well types in the two typical reservoirs show obviously different variation laws when the short-term depressurization is conducted in the inclined formation;2)the inclined formation will reduce the gas production and increase the water extraction,and the phenomena becomes pronounced as the dip angle increases,particularly in the low-permeability reservoirs;3)and the impact of formation dip on hydrate recovery does not change significantly with the variation of well type.展开更多
The Cybersecurity Standardization Conference 2024 took place in Brussels, Belgium in hybrid forms on March 5, 2024, with the theme of “Fast evolving landscape of EU legislation: challenges and opportunities for stand...The Cybersecurity Standardization Conference 2024 took place in Brussels, Belgium in hybrid forms on March 5, 2024, with the theme of “Fast evolving landscape of EU legislation: challenges and opportunities for standardization”.展开更多
The year 2024 is crucial for China to further implement the National Standardization Development Outline and achieve the development goals by 2025. The overall requirements of the national standardization work in 2024...The year 2024 is crucial for China to further implement the National Standardization Development Outline and achieve the development goals by 2025. The overall requirements of the national standardization work in 2024 are as follows: under the guidance of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era.展开更多
In March,Standardization Administration of China(SAC)published the Annual Report on Standardization Development of China(2023),which gives an overview of China’s standardization work last year including the analysis ...In March,Standardization Administration of China(SAC)published the Annual Report on Standardization Development of China(2023),which gives an overview of China’s standardization work last year including the analysis of key data and how standards advance technologies and promote social and economic development.It also clarifies the role of standards in promoting equipment renewal,expanding high-level opening up,and stabilizing the industrial chain in the near future.展开更多
The themed activity of World Standards Day 2023 was held in Liuzhou,South China’s Guangxi Zhuang autonomous region on October 13,to raise the awareness about the importance of standards and recognize the contribution...The themed activity of World Standards Day 2023 was held in Liuzhou,South China’s Guangxi Zhuang autonomous region on October 13,to raise the awareness about the importance of standards and recognize the contribution of standardizers.With the theme of“Shared Vision for a Better World”,for the past years.展开更多
At the WSD 2023 celebration event,four representatives from the government,companies and research institute shared their understanding of and experience on how standards boost the development of a business,an industry...At the WSD 2023 celebration event,four representatives from the government,companies and research institute shared their understanding of and experience on how standards boost the development of a business,an industry or even a city.Here,you can find their stories.展开更多
基金supported by the National Natural Science Foundation of China(Nos.42372361 and 51904280)the Key Research and Development Program of China(No.2018YFE0126400).
文摘Natural gas hydrate has huge reserves and is widely distributed in marine environment.Its commercial development is of great significance for alleviating the contradiction between energy supply and demand.As an efficient research method,numerical simulation can provide valuable insights for the design and optimization of hydrate development.However,most of the current production models simplify the reservoir as a two-dimensional(2D)horizontal layered model,often ignoring the impact of formation dip angle.To improve the accuracy of production prediction and provide theoretical support for the optimization of production well design,two three-dimensional(3D)geological models with different dip angles based on the geological data from two typical sites are constructed.The vertical well,horizontal well and multilateral wells are deployed in these reservoirs with different permeabilities to perform production trial,and the sensitivity analysis of dip angles is also carried out.The short-term production behaviors in high and low permeability reservoirs with different dip angles are exhibited.The simulation results show that 1)the gas and water production behaviors for different well types in the two typical reservoirs show obviously different variation laws when the short-term depressurization is conducted in the inclined formation;2)the inclined formation will reduce the gas production and increase the water extraction,and the phenomena becomes pronounced as the dip angle increases,particularly in the low-permeability reservoirs;3)and the impact of formation dip on hydrate recovery does not change significantly with the variation of well type.
文摘The Cybersecurity Standardization Conference 2024 took place in Brussels, Belgium in hybrid forms on March 5, 2024, with the theme of “Fast evolving landscape of EU legislation: challenges and opportunities for standardization”.
文摘The year 2024 is crucial for China to further implement the National Standardization Development Outline and achieve the development goals by 2025. The overall requirements of the national standardization work in 2024 are as follows: under the guidance of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era.
文摘In March,Standardization Administration of China(SAC)published the Annual Report on Standardization Development of China(2023),which gives an overview of China’s standardization work last year including the analysis of key data and how standards advance technologies and promote social and economic development.It also clarifies the role of standards in promoting equipment renewal,expanding high-level opening up,and stabilizing the industrial chain in the near future.
文摘The themed activity of World Standards Day 2023 was held in Liuzhou,South China’s Guangxi Zhuang autonomous region on October 13,to raise the awareness about the importance of standards and recognize the contribution of standardizers.With the theme of“Shared Vision for a Better World”,for the past years.
文摘At the WSD 2023 celebration event,four representatives from the government,companies and research institute shared their understanding of and experience on how standards boost the development of a business,an industry or even a city.Here,you can find their stories.
