Modeling Transient Flow in CO2 Injection Wells by Considering the Phase Change

被引：7
|
作者：
Wan, Nian-Hui [1 ]
Wang, Li-Song [2 ,3 ]
Hou, Lin-Tong [2 ,3 ]
Wu, Qi-Lin [1 ]
Xu, Jing-Yu [2 ,3 ]
机构：
[1] CNOOC Ltd, Shenzhen Branch, Shenzhen 518000, Peoples R China
[2] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
来源：
PROCESSES | 2021年 / 9卷 / 12期
基金：
中国国家自然科学基金;
关键词：
wellbore temperature; CO2; fracturing; phase transition; supercritical CO2; flow; SUPERCRITICAL CARBON-DIOXIDE; PRESSURE FIELDS; TEMPERATURE; WELLBORE;
D O I：
10.3390/pr9122164
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A transient model to simulate the temperature and pressure in CO2 injection wells is proposed and solved using the finite difference method. The model couples the variability of CO2 properties and conservation laws. The maximum error between the simulated and measured results is 5.04%. The case study shows that the phase state is primarily controlled by the wellbore temperature. Increasing the injection temperature or decreasing the injection rate contributes to obtaining the supercritical state. The variability of density can be ignored when the injection rate is low, but for a high injection rate, ignoring this may cause considerable errors in pressure profiles.
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收藏
页数：13
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