DOI: 10.1016/j.jcou.2018.06.010
Scopus记录号: 2-s2.0-85049105293
论文题名: Model for calculating the wellbore temperature and pressure during supercritical carbon dioxide fracturing in a coalbed methane well
作者: Yang Z.-Z. ; Yi L.-P. ; Li X.-G. ; Chen Y.-T. ; Sun J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 602
结束页码: 611
语种: 英语
英文关键词: Coalbed methane well
; Fracturing
; Pressure
; Supercritical carbon dioxide
; Temperature
Scopus关键词: Coal bed methane
; Coal deposits
; Firedamp
; Fluid mechanics
; Fracturing (fossil fuel deposits)
; Friction
; Heat transfer
; Hydraulic fracturing
; Low permeability reservoirs
; Methane
; Natural gas wells
; Numerical methods
; Numerical models
; Oil field equipment
; Petroleum reservoir engineering
; Pressure
; Supercritical fluid extraction
; Temperature
; Coal bed methane wells
; Frictional resistance
; Hydrocarbon reservoir
; Injection temperature
; Numerical solution method
; Supercritical carbon dioxides
; Transient process
; Wellbore temperature
; Carbon dioxide
英文摘要: Supercritical CO2 fracturing can form a more complex fracture network in rocks than hydraulic fracturing and avoid aqueous phase trapping damage in reservoirs. Thus, it is a promising alternative to hydraulic fracturing for enhancing the production of low-permeability hydrocarbon reservoirs. In this study, a new numerical model for predicting the wellbore temperature and pressure during supercritical CO2 fracturing was established based on thermodynamics, heat transfer, fluid mechanics, and a numerical solution method. In the new model, the physical properties of CO2 are calculated with the Span-Wagner and Vesovic models, and the heat generated by fluid friction losses is absorbed by the tubing and CO2 according to the contact coefficient. The model was used to examine the influences of the injection rate and temperature on the wellbore pressure and temperature. The results indicated that both the heat transfer and pressure in the wellbore are transient processes in the initial stage of injection; as the injection time increases, the heat transfer and pressure in the wellbore can be considered steady processes. The CO2 temperature in the wellbore is considerably affected by both the injection temperature and rate, whereas the wellbore pressure is greatly affected by the injection rate but weakly affected by the injection temperature. The CO2 pressure in the wellbore decreases rapidly as the well depth increases because of high fluid frictional resistance, so a drag reducer suitable for liquid CO2 needs to be developed. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111848
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu Avenue 8, Chengdu, 610500, China; CNPC Offshore Engineering Co., Ltd., Beijing, 100028, China; Down-Hole Operating Company, Chuanqing Drilling and Exploration Engineering Co., Ltd., Chengdu, 610051, China
Recommended Citation:
Yang Z.-Z.,Yi L.-P.,Li X.-G.,et al. Model for calculating the wellbore temperature and pressure during supercritical carbon dioxide fracturing in a coalbed methane well[J]. Journal of CO2 Utilization,2018-01-01,26