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temperature-transients
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A new method in well test interpretation using temperature transient analysis for gas wells
, Article International Petroleum Technology Conference 2007, IPTC 2007, Dubai, 4 December 2007 through 6 December 2007 ; Volume 2 , 2007 , Pages 1151-1160 ; 9781615673360 (ISBN) ; Siavoshi, J ; Sharif University of Technology
Society of Petroleum Engineers
2007
Abstract
Interpretation of temperature logs has been done successfully in wells to identify water or gas entries location, detect casing leaks, and evaluate cement placement. This paper shows how knowledge of the Joule-Thomson cooling effect and frictional heating effect can be applied for well test interpretation. Many analysts rely on pressure derivative curve to diagnose wellbore storage period and radial flow regime on pressure transient data. However, there are field examples that flow regimes can't be accurately determined. During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating...
Microstructural analysis of a girth welded subsea pipe
, Article Engineering Letters ; Volume 26, Issue 1 , 2018 , Pages 193-202 ; 1816093X (ISSN) ; Wang, B ; Wrobel, L. C ; Chizari, M ; Sharif University of Technology
International Association of Engineers
2018
Abstract
This research focuses on simulation of the dissimilar materials’ welding, stainless steel and mild steel, using finite element and experiment to enhance the method and better understand the transient temperature profiles and the stress distribution in a cladded pipe. The microstructural come as fenestrated and the computer results show that the temperature distribution in the modelled pipe is a function of the thermal conductivity of each weld metal as well as the distance away from the heat source. © 2018, International Association of Engineers. All rights reserved
Application of temperature transient analysis for welltest interpretation and well productivity evaluation
, Article Society of Petroleum Engineers - SPE Asia Pacific Oil and Gas Conference and Exhibition, Jakarta, Indonesia,October 30–November 1, 2007 ; 2007 ; 9781613990407 (ISBN) ; Siavoshi, J ; Sharif University of Technology
2007
Abstract
During transient tests, both pressure and temperature are changed depending on downhole flow rate. In gas producing wells, Joule-Thomson cooling and frictional heating effects are the main dynamic factors causing flowing bottomhole temperature to differ from the static formation temperature at that depth. When a gas well is shut in, JT cooling effect is vanished and this causes a sharp increase in sandface temperature. As effect of wellbore storage ends, wellbore temperature gradually cools down due to heat conduction with near wellbore region. This paper demonstrates a new technique for using temperature transient data in gas wells in order to determine end of wellbore storage. Also, effect...
Residual stress simulations of girth welding in subsea pipelines
, Article Lecture Notes in Engineering and Computer Science, 5 July 2017 through 7 July 2017 ; Volume 2230 , 2017 , Pages 861-866 ; 20780958 (ISSN) ; 9789881404831 (ISBN) ; Wang, B ; Wrobel, L. C ; Chizari, M ; Korsunsky, A. M ; Hunter, A ; Gelman, L ; Ao, S. I ; Hukins, D. WL ; Sharif University of Technology
Abstract
Numerical modelling of the welding of dissimilar materials, stainless steel and mild steel, has been carried out using Abaqus together with Gas Metal Arc Weld (GMAW) in order to provide a better understanding of the transient temperature profiles and the stress distribution in a pipe. The results clearly show that the temperature distribution in the modelled pipe is a function of the thermal conductivity of each weld metal as well as the distance away from the heat source. Results also clearly show agreement with previous findings
Performance analysis and transient simulation of a vapor compression cooling system integrated with phase change material as thermal energy storage for electric peak load shaving
, Article Journal of Energy Storage ; Volume 35 , 2021 ; 2352152X (ISSN) ; Jafari Mosleh, H ; Kavian, S ; Shafii, M. B ; Sharif University of Technology
Elsevier Ltd
2021
Abstract
A vapor-compression cooling system utilizing PCM is studied whereby the electricity consumption peak load is shifted. More specifically, the dynamic performance of the cooling system with and without PCM is evaluated and is presented with details on the hottest day of the year in Tehran, Iran. The proposed system uses the cooling energy to freeze or “discharge” the PCM during nighttime when the cooling load is minimally needed and uses the stored cooling energy during the peak load hours by melting or “charging” the PCM. This leads to better performance during the peak load hours when higher cooling loads are required. Oleic acid was chosen as PCM. The simulation was performed in EES...