ACTA PETROLEI SINICA ›› 2014, Vol. 35 ›› Issue (4): 765-770.DOI: 10.7623/syxb201404020

• Petroleum Engineering • Previous Articles     Next Articles

Impact pressure and parametric sensitivity analysis of supercritical CO2 jet

Cheng Yuxiong, Li Gensheng, Shen Zhonghou, Wang Haizhu, Li Jingbin   

  1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
  • Received:2014-02-28 Revised:2014-05-24 Online:2014-07-25 Published:2014-08-05

超临界二氧化碳射流冲击压力参数影响规律

程宇雄, 李根生, 沈忠厚, 王海柱, 李敬彬   

  1. 中国石油大学油气资源与探测国家重点实验室 北京 102249
  • 通讯作者: 李根生,男,1961年9月生,1983年毕业于华东石油学院钻井工程专业,1988年获石油大学(北京)油气井工程专业博士学位,现为中国石油大学(北京)教授、博士生导师,主要从事油气钻井和完井工程方面的研究。Email:ligs@cup.edu.cn
  • 作者简介:程宇雄,男,1987年6月生,2006年毕业于中国石油大学(华东)石油工程专业,现为中国石油大学(北京)博士研究生,主要从事油气钻完井与油田增产方面的研究。Email:chengyuxiong@126.com
  • 基金资助:

    国家自然科学基金创新研究群体项目(No.51221003)和国家自然科学基金重大国际(地区)合作项目(No.51210006)资助。

Abstract:

This study aimed to explore the impact pressure and parametric influences of supercritical CO2 jet. Three-dimension flow fields of supercritical CO2 jet were simulated using a computational fluid dynamic method. A comparative analysis of impact pressure was performed between supercritical CO2 jet and water jet, followed by a parametric sensitivity analysis. The results show that supercritical CO2 jet generates stronger impact pressure than water jet under the same conditions. With increasing nozzle pressure drop and nozzle diameter, the impact pressure of supercritical CO2 jet increases. As the standoff distance increases, the impact pressure of supercritical CO2 jet decreases while its impact scope increases. The confining pressure and fluid temperature have minor effects on the impact pressure and scope of supercritical CO2 jet, which can be neglected in engineering applications. This study verifies the impact pressure of supercritical CO2 jet and uncovers its parametric influences, thus providing guidance for the applications of supercritical CO2 jet in well drilling and completion engineering.

Key words: supercritical carbon dioxide, water jet, impact pressure, flow field, numerical simulation

摘要:

为了探明超临界CO2射流对岩石冲击压力及其参数影响规律,利用计算流体力学模拟了超临界CO2射流冲击的三维流场,对比了超临界CO2射流和水射流的冲击压力,进行了参数影响规律研究。结果表明:在相同条件下,超临界CO2射流能产生比水射流更强的冲击效果;超临界CO2射流冲击压力 随着喷嘴压降和喷嘴直径的增大而增大;随着喷距的增大,超临界CO2射流的冲击压力降低,冲击范围扩大;围压和流体温度的变化对超临界CO2射流冲击压力的强度和范围的影响极小,在工程应用中可以忽略。研究结果证实了超临界CO2射流的冲击效果,探明了超临界CO2射流冲击压力的参数影响规律,为超临界CO2射流在钻完井工程中的应用提供了指导。

关键词: 超临界二氧化碳, 水射流, 冲击压力, 流场, 数值模拟

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