Numerical simulation of superheated steam flow in dual-tubing wells
Abstract In this paper, a novel model is presented to estimate the thermophysical properties of superheated steam (SHS) in dual-tubing wells (DTW). Firstly, a mathematical model comprised of the mass conservation equation, momentum balance equation and energy balance equation in the integral joint t...
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doaj-bc8e2041a42142b088b5f93266f0293c2020-11-25T01:33:12ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662017-10-018392593710.1007/s13202-017-0390-7Numerical simulation of superheated steam flow in dual-tubing wellsFengrui Sun0Yuedong Yao1Xiangfang Li2State Key Laboratory of Petroleum Resources and Prospecting, China University of PetroleumState Key Laboratory of Petroleum Resources and Prospecting, China University of PetroleumCollege of Petroleum Engineering, China University of PetroleumAbstract In this paper, a novel model is presented to estimate the thermophysical properties of superheated steam (SHS) in dual-tubing wells (DTW). Firstly, a mathematical model comprised of the mass conservation equation, momentum balance equation and energy balance equation in the integral joint tubing (IJT) and annuli is proposed for concentric dual-tubing wells (CDTW), and in the main tubing (MT) and auxiliary tubing (AT) for parallel dual-tubing wells (PDTW). Secondly, the distribution of temperature, pressure and superheat degree along the wellbores are obtained by finite difference method on space and solved with iteration technique. Finally, based upon the validated model, sensitivity analysis of injection temperature is conducted. The results show that: (1) effect of injection temperature difference between MT and AT on temperature profiles is weak compared with that between the IJT and annuli. (2) Temperature gradient in IJT and annuli near wellhead is larger than that in MT and AT. (3) Superheat degree in both CDTW and PDTW increases with the increase in injection temperature in IJT and MT, respectively. (4) Superheat degree in IJT and MT decreases rapidly near wellhead, but the superheat degree in annuli and AT has an increase. (5) Thermal radiation and convection are the main ways of heat exchange between MT and AT. This paper gives engineers a novel insight into what is the flow and heat transfer characteristics of SHS in DTW, and provides an optimization method of injection parameters for oilfield.http://link.springer.com/article/10.1007/s13202-017-0390-7Heavy oilSuperheated steamDual-tubing wellsConcentricParallelThermophysical properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fengrui Sun Yuedong Yao Xiangfang Li |
spellingShingle |
Fengrui Sun Yuedong Yao Xiangfang Li Numerical simulation of superheated steam flow in dual-tubing wells Journal of Petroleum Exploration and Production Technology Heavy oil Superheated steam Dual-tubing wells Concentric Parallel Thermophysical properties |
author_facet |
Fengrui Sun Yuedong Yao Xiangfang Li |
author_sort |
Fengrui Sun |
title |
Numerical simulation of superheated steam flow in dual-tubing wells |
title_short |
Numerical simulation of superheated steam flow in dual-tubing wells |
title_full |
Numerical simulation of superheated steam flow in dual-tubing wells |
title_fullStr |
Numerical simulation of superheated steam flow in dual-tubing wells |
title_full_unstemmed |
Numerical simulation of superheated steam flow in dual-tubing wells |
title_sort |
numerical simulation of superheated steam flow in dual-tubing wells |
publisher |
SpringerOpen |
series |
Journal of Petroleum Exploration and Production Technology |
issn |
2190-0558 2190-0566 |
publishDate |
2017-10-01 |
description |
Abstract In this paper, a novel model is presented to estimate the thermophysical properties of superheated steam (SHS) in dual-tubing wells (DTW). Firstly, a mathematical model comprised of the mass conservation equation, momentum balance equation and energy balance equation in the integral joint tubing (IJT) and annuli is proposed for concentric dual-tubing wells (CDTW), and in the main tubing (MT) and auxiliary tubing (AT) for parallel dual-tubing wells (PDTW). Secondly, the distribution of temperature, pressure and superheat degree along the wellbores are obtained by finite difference method on space and solved with iteration technique. Finally, based upon the validated model, sensitivity analysis of injection temperature is conducted. The results show that: (1) effect of injection temperature difference between MT and AT on temperature profiles is weak compared with that between the IJT and annuli. (2) Temperature gradient in IJT and annuli near wellhead is larger than that in MT and AT. (3) Superheat degree in both CDTW and PDTW increases with the increase in injection temperature in IJT and MT, respectively. (4) Superheat degree in IJT and MT decreases rapidly near wellhead, but the superheat degree in annuli and AT has an increase. (5) Thermal radiation and convection are the main ways of heat exchange between MT and AT. This paper gives engineers a novel insight into what is the flow and heat transfer characteristics of SHS in DTW, and provides an optimization method of injection parameters for oilfield. |
topic |
Heavy oil Superheated steam Dual-tubing wells Concentric Parallel Thermophysical properties |
url |
http://link.springer.com/article/10.1007/s13202-017-0390-7 |
work_keys_str_mv |
AT fengruisun numericalsimulationofsuperheatedsteamflowindualtubingwells AT yuedongyao numericalsimulationofsuperheatedsteamflowindualtubingwells AT xiangfangli numericalsimulationofsuperheatedsteamflowindualtubingwells |
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1725078796984385536 |