超临界二氧化碳射流中的颗粒跟随及影响因素

doi:10.7623/syxb201704012

石油学报 ›› 2017, Vol. 38 ›› Issue (4): 475-484.DOI: 10.7623/syxb201704012

超临界二氧化碳射流中的颗粒跟随及影响因素

贺振国^1,2, 李根生¹, 王海柱¹, 田守嶒¹, 沈忠厚¹, 邵尚奇³, 刘新云²

1. 中国石油大学油气资源与探测国家重点实验室北京 102249;
2. 中国石油勘探开发研究院北京 100083;
3. 中海油服油田生产服务事业部天津 300450

收稿日期:2016-10-19 修回日期:2017-02-22 出版日期:2017-04-25 发布日期:2017-05-04
通讯作者: 李根生,男,1961年9月生,1983年获华东石油学院学士学位,1998年获石油大学(北京)博士学位,现为中国工程院院士、中国石油大学(北京)博士生导师,主要从事油气钻井和完井工程研究工作。Email:ligs@cup.edu.cn
作者简介:贺振国,男,1986年2月生,2008年获中国石油大学(北京)学士学位,2016年获中国石油大学(北京)博士学位,现为中国石油勘探开发研究院工程师,主要从事国内外油气钻井工程方案设计与技术支持工作。Email:hezhenguo@petrochina.com.cn
基金资助:
国家重点基础研究发展计划（973）项目（2014CB239203）、国家自然科学基金国际合作项目（No.51210006）、国家自然科学基金石油化工联合基金重点项目（U1562212）资助。

Particle following motion in supercritical carbon dioxide jet and its influence factors

He Zhenguo^1,2, Li Gensheng¹, Wang Haizhu¹, Tian Shouceng¹, Shen Zhonghou¹, Shao Shangqi³, Liu Xinyun²

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
3. COSL Production Optimization Business Division, Tianjin 300450, China

Received:2016-10-19 Revised:2017-02-22 Online:2017-04-25 Published:2017-05-04

摘要/Abstract

摘要：

超临界二氧化碳射流具有破岩速度高、门限压力低等优势，加入磨料颗粒形成超临界二氧化碳磨料射流，将取得更高的冲蚀切割效率。为研究超临界二氧化碳磨料射流可行性，采用数值模拟方法，对比分析了单个颗粒在超临界二氧化碳等流体射流中的运动特征，揭示了流体温度、磨料粒径对颗粒跟随运动的影响规律。结果表明，与相同条件下在水与压裂液射流中相比，磨料颗粒在超临界二氧化碳射流中运动规律相似，但初始滑脱速度较大、跟随能力较弱，获得的喷射速度与撞击靶件壁面速度较高，表明超临界二氧化碳具有良好的颗粒携带能力；流体温度升高、磨料粒径增大均会使颗粒滑脱速度增大、削弱跟随运动效率，但同时也降低了喷嘴外流场中颗粒所受运动阻力，显著提高了喷射速度与撞击壁面速度。由此可知，对于石英、陶粒等常用磨料材质，在常规储层温度（60~140℃）与粒径范围（20~70目）内，超临界二氧化碳磨料射流可有效形成并进行高效冲蚀切割作业。

关键词: 超临界二氧化碳, 射流, 单个颗粒, 跟随, 影响因素

Abstract:

Supercritical carbon dioxide (SC-CO₂) jet has such advantages as high rock-breaking velocity and low threshold pressure. The addition of abrasive particles will lead to SC-CO₂ abrasive jet with high erosion and cutting efficiency. To study the feasibility of SC-CO₂ abrasive jet, numerical simulation methods were used to analyze the single-particle motion characteristics in different fluid jets such as SC-CO₂ jet and reveal the influence laws of fluid temperature and abrasive size on particle following motion. Results indicate that compared with the water and fracturing fluid jet under equal conditions, abrasive particles have similar motion laws in the SC-CO₂ jet, characterized by large initial slipping velocity and weak following capacity. However, high jet velocity and large target-wall impinging velocity are obtained, proving that the SC-CO₂ has favorable particle carrying capacity. The increase of fluid temperature and abrasive size will not only improve the particle slipping velocity and weaken the particle following motion efficiency, but also reduce the particle motion resistance in the nozzle external flow field and significantly raise the jet velocity and target-wall impinging velocity. As a consequence, in the ranges of conventional reservoir temperature (60-140℃) and particle diameter (20-70 mesh) for quartz, ceramsite and common abrasive materials, SC-CO₂ abrasive jet is expected to be formed for highly efficient erosion and cutting operations.

Key words: supercritical CO₂, jet, single abrasive particle, following motion, sensitivity analysis

中图分类号:

TE357.1

贺振国, 李根生, 王海柱, 田守嶒, 沈忠厚, 邵尚奇, 刘新云. 超临界二氧化碳射流中的颗粒跟随及影响因素[J]. 石油学报, 2017, 38(4): 475-484.

He Zhenguo, Li Gensheng, Wang Haizhu, Tian Shouceng, Shen Zhonghou, Shao Shangqi, Liu Xinyun. Particle following motion in supercritical carbon dioxide jet and its influence factors[J]. Acta Petrolei Sinica, 2017, 38(4): 475-484.

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超临界二氧化碳射流中的颗粒跟随及影响因素

Particle following motion in supercritical carbon dioxide jet and its influence factors

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