DOI: 10.1016/j.jcou.2017.08.012
Scopus记录号: 2-s2.0-85028348200
论文题名: Pressure transmission in the tubing of supercritical carbon dioxide fracturing
作者: Song W. ; Ni H. ; Wang R. ; Sun B. ; Shen Z.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21 起始页码: 467
结束页码: 472
语种: 英语
英文关键词: Fracturing
; Heat transfer
; Hydraulics calculation
; Pressure transmission
; Supercritical carbon dioxide
Scopus关键词: Fiber optic sensors
; Fighter aircraft
; Fracturing (fossil fuel deposits)
; Heat transfer
; Hydraulics
; Hydrostatic pressure
; Liquefied gases
; Supercritical fluid extraction
; Tubing
; Viscosity
; Changing temperature
; Hydraulics calculations
; Liquid carbon dioxide
; Pressure transmission
; Reservoir stimulations
; Supercritical carbon dioxides
; Temperature differences
; Theoretical foundations
; Carbon dioxide
英文摘要: The hydrostatic pressure state at bottom hole is directly correlated with the reservoir stimulation results, and a mathematical model was proposed to investigate the pressure transmission in the tubing in order to calculate the hydrostatic pressure state at bottom hole for supercritical carbon dioxide fracturing. The closed model fully coupled the pressure transmission, heat transfer and compressibility of carbon dioxide, and then the wellbore flow field is presented based on field application. The results show that, the pressure increases in a linear method after hypothermic liquid carbon dioxide is injected into the tubing. In the jet nozzles at bottom hole, the pressure drops abruptly by 6.55 MPa. The increasing trend of temperature slows down gradually as well depth increases, and it dominates the changing trend of both density and viscosity of carbon dioxide. The density, viscosity and conductivity all decreases with increasing depth, while the changing trend of conductivity is dominated by the increasing pressure. As the well depth increases, the capacity firstly increases because of larger temperature increase and then it gradually begins to decrease because of larger influence of pressure increase. The pressure transmission is directly related to density profile and viscosity profile, and the heat transfer is mainly dominated by the temperature difference between carbon dioxide in the tubing and formation rock. The pressure transmission is highly coupled with changing temperature and properties of carbon dioxide. The results facilitate to lay theoretical foundation for manual control of supercritical carbon dioxide fracturing. © 2017 Elsevier Ltd. All rights reserved. 资助项目: National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52642
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Song W.,Ni H.,Wang R.,et al. Pressure transmission in the tubing of supercritical carbon dioxide fracturing[J]. Journal of CO2 Utilization,2017-01-01,21