Advantages and disadvantages of in situ N2 presence in underground gas storage (UGS) process: Technical and economical evaluation of a case study

2020 ◽  
Vol 84 ◽  
pp. 103649
Author(s):  
Ali Tahmasebi ◽  
Aram Nasiri ◽  
Masoud Riazi ◽  
Mohammadkazem Amiri
2020 ◽  
Vol 44 (1) ◽  
pp. 20-31
Author(s):  
João Pedro Silva ◽  
Paulo Mendonça ◽  
Paulo J. Ramísio

This paper reflects on the ability to adapt buildings with relevant heritage and historical value to different uses and functions. A case study is presented: The relocation of Braga’s District Archive from the former Archbishop’s Palace in Largo do Paço, a building dating back to the XIVth century confined within the Historical Center’s buffer zone, into a modernist building located in Abade Loureira street, North of the original complex and outside the medieval walled city. The methodological approach and the processes associated with the intervention are presented according to the analysis of the proposed program, rather than by the formal and symbolic features of the building itself. Extensive in-situ surveys took place at the two buildings, comparing both the present and the proposed solution. Based on this analysis, the Program’s adequacy is discussed, displaying the advantages and disadvantages of this change and how it may affect the mission of the District Archive.


2019 ◽  
Vol 11 (2) ◽  
pp. 251-262 ◽  
Author(s):  
Tongtao Wang ◽  
Jianjun Li ◽  
Gang Jing ◽  
Qingqing Zhang ◽  
Chunhe Yang ◽  
...  

2021 ◽  
Author(s):  
Mingjun Chen ◽  
Jiaxin Shao ◽  
Lijun You ◽  
Yili Kang ◽  
Seng Meng ◽  
...  

Abstract Different injection and production pressure modes for underground gas storage have great differences on the permeability of formation rocks. In this paper, core flow experiments are designed and carried out to simulate the real pressure gradient of the injection and production in underground gas storage, and these experiments are carried out under in-situ stress conditions. The permeability and turbidity of core outlet were monitored during the experiment. The experimental results show that under different injection-production pressure modes, the permeability changes and the turbidity at the core outlet changes. It was observed by scanning electron microscope that there were fines on the fracture wall after the experiment. Analysis shows that fine migration is the main reason for the change of permeability under different injection-production pressure modes.


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