引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 317次   下载 233 本文二维码信息
码上扫一扫!
分享到: 微信 更多
超临界CO2钻井井筒流动规律
宋维强, 倪红坚, 景英华, 王瑞和, 沈忠厚, 李斌1,2,3
1. 中国石油大学石油工程学院, 山东青岛 266580;2. 中国石油大学非常规油气与新能源研究院, 山东青岛 266580;3. 中国石油西部钻探工程有限公司, 新疆乌鲁木齐 830011
摘要:
考虑井筒轴向传热以及井壁围岩的温度变化对流场的影响,建立CO2井筒循环流动模型,实现对流场压力参数、温度参数与CO2物性参数的耦合计算与分析。结果表明:实验条件下连续管内CO2由液态转变为超临界态的临界井深为780 m,环空中CO2可始终处于超临界态;环空中压力剖面与井深近似呈线性相关,CO2的压降比水的小36.7%;连续管内物性参数的变化主要由温度的变化决定,环空中则取决于压力的变化;环空中雷诺数高达106,处于较强的紊流状态;超临界CO2钻井在窄密度窗口储层应用中具有优势。
关键词:  超临界CO2  井筒流动  传热  压力剖面  雷诺数
DOI:10.3969/j.issn.1673-5005.2017.06.012
分类号:
基金项目:国家"973"重大专项(2014CB239202);国家博士后基金项目(2017m622315);国家自然科学基金项目(51504281);山东省自然科学基金项目(ZR201709190087)
Study on wellbore flow field of supercritical carbon dioxide drilling
SONG Weiqiang, NI Hongjian, JING Yinghua, WANG Ruihe, SHEN Zhonghou, LI Bin1,2,3
1. School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China;2. Research Institute of Unconventional Petroleum and Renewable Energy in China University of Petroleum, Qingdao 266580, China;3. CNPC Xibu Drilling Engineering Company Limited(XDEC), Urumqi 830011, China
Abstract:
A wellbore circulation flow model was proposed to couple calculate and analyze the flow field pressure parameter, temperature parameter and physical parameter of CO2, in consideration of the influence of the axial heat transfer and the temperature change of sidewall rocks on the flow field. The results show that CO2 turns into supercritical state at the depth of 780 m in the tubing and it maintains the supercritical state in the annulus under experimental conditions. The pressure in the annulus is approximately in linear correlation with depth. The pressure change of CO2 is 36.7% smaller than that of water. In the tubing, the temperature change dominates the changes of properties of CO2. However, the pressure change becomes the dominating factor in the annulus. The Reynolds number is as high as 106 in the annulus, which is in violent turbulence. The supercritical CO2 drilling shows advantages in the exploitation of reservoirs with narrow pressure windows.
Key words:  supercritical CO2  wellbore flow  heat transfer  pressure profile  Reynolds number
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983496 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计