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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2019028333
pages 115-128


Qun Gong
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Jie Qin
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Jianping Lan
CCDC Changqing Downhole Technology Company, Xi'an, 710018, China
Changying Zhao
Research Center of New Energy and Energy Storage, China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Engineering Thermophysics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Zhiguo Xu
School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Краткое описание

In the present study, a transient flow and heat transfer model considering factors of CO2 thermal properties, viscous dissipation, heat conduction, and Joule−Thomson (J−T) effect is proposed to investigate the wellbore temperature and pressure. The viscous dissipation is considered as the amount of mechanical energy converted to thermal energy. The key parameter effects on the wellbore temperature and pressure are analyzed based on investigation of a well of diameter 50.3 mm and depth 3600 m. The results show that the temperature of CO2 increases with the well depth and decreases with increasing injection time. The CO2 pressure gradient is dominated by fluid velocity. More likely, a negative pressure gradient appears more likely in deeper wells. Simulation of molecular dynamics is used to calculate the solvation free energy of solute in CO2. The results show that polyoxyethylene 23-lauryl ether is the most promising soluble substance among the studied surfactants. Polyoxyethylene 6-nonyl phenol improves the viscosity of CO2 by a maximum of 23.8% at a concentration of 5 wt.% under the condition of 323.15 K and 30 MPa. With increasing CO2 viscosity, the bottom-hole temperature and pressure vary slightly.


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