Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide
-
摘要: 超临界二氧化碳(CO2)射流破岩既能降低岩石门限压力又能有效保护储层，直旋混合射流兼具直射流和旋转射流特点可提高破岩效率，基于此提出了超临界CO2直旋混合射流的破岩方法。为了揭示超临界CO2直旋混合射流破岩特性，设计加工出叶轮式直旋混合射流喷嘴，通过岩石定点冲击破碎实验对比了该射流与常规水射流的破岩效果，并研究了叶轮长度、叶轮中心孔直径、混合腔长度、喷射距离、射流压力等重要参数对超临界CO2直旋混合射流破岩效果的影响。结果表明：相同实验条件下，该射流方法的平均破岩能力比常规水射流提高了42.9%；超临界CO2直旋混合射流破岩易出现较大体积岩屑崩落现象；随着叶轮长度、混合腔长度、喷射距离的增大破岩效果均先增强后减弱，实验条件下上述参数存在最优范围值；叶轮中心孔直径的增大会导致岩石破碎孔深度增加、直径减小；随着射流压力的升高，超临界CO2直旋混合射流破岩效果有着较为明显的提升。研究结果可为超临界CO2直旋混合射流破岩方法的进一步研究提供实验依据。Abstract: Integrating supercritical carbon dioxide jet, known for its capability of reducing the threshold pressure of the rock and protecting the reservoir, with the combined swirling and round jet, known for its capability of enhancing the efficiency of rock erosion owing to its features, we would have a new highly efficient jet technology that may be called as combined swirling and round jet with supercritical carbon dioxide. In order to investigate the law governing its rock erosion, we carried out an experiment aiming at comparing the rock erosion capacity of this method with that of the conventional water jet and studying the effects produced by the of five important factors (the impeller length, the central hole diameter of the impeller, the length of the mixing chamber, the standoff, and the jet pressure) on rock erosion by using the nozzle which has been designed and fabricated especially for this purpose. The result shows that the rock erosion efficiency of this jet method is 42.9% higher than that of the conventional water round jet; the swirling and round jet with supercritical carbon dioxide may lead to the occurrence of rock mass breakaway; with the increase of the impeller length, the length of the mixing chamber and the standoff, the erosion performance tends to slacken after an initial good efficiency; the increase of the central hore diameter of the impeller can result in both a greater erosion depth and a reduced erosion diameter; and erosion efficiency can be enhanced by increasing the jet pressure. The results from the present study can be serve as an experimental basis for further research.
-
图 1 超临界CO2喷射破岩实验系统
Figure 1. Rock erosion experiment system of supercritical carbon dioxide jet
图 5 3种超临界CO2射流方案破破岩效果实体对比图
Figure 5. Stereogram of rock-erosion with three jets of supercritical carbon dioxide
图 6 3种超临界CO2射流方案破岩效果对比
Figure 6. Comparison of rock-erosion between three jets of supercritical carbon dioxide
图 7 破岩过程中大体积岩块崩落现象
Figure 7. Phenomenon of rock mass breakaway in rock-erosion process
图 9 叶轮中心孔直径对射流破岩效果的影响
Figure 9. Effect of the impeller center hole diameter on rock-erosion
表 1 实验方案
Table 1. Experimental scheme
岩石批号 L2 d1/mm L1/mm) H/mm p/MPa 1 3, 4, 5, 6, 7 1.0 5 3 40 1 5 0, 1.0, 1.5, 2.0 5 3 40 1 5 1.5 3, 4, 5, 6 3 40 2 5 1.5 5 1, 2, 3, 4, 5, 6 35 2 5 1.5 5 4 20, 25, 30, 35, 40, 45 
下载: 导出CSV
-
[1] 李建忠, 郑民, 张国生, 等.中国常规与非常规天然气资源潜力及发展前景[J].石油学报, 2012, 33(1):89-98. http://d.old.wanfangdata.com.cn/Periodical/syxb2012z1011Li Jianzhong, Zheng Min, Zhang Guosheng, et al. Potential and prospects of conventional and unconventional natural gas resource in China[J]. Acta Petrolei Sinica, 2012, 33(1):89-98. http://d.old.wanfangdata.com.cn/Periodical/syxb2012z1011 [2] 宋岩, 张新民, 柳少波, 等.中国煤层气基础研究和勘探开发技术新进展[J].天然气工业, 2005, 25(1):1-7. doi: 10.3321/j.issn:1000-0976.2005.01.002Song Yan, Zhang Xinmin, Liu Shaobo.Progress in the basic studies and exploration & development techniques of coalbed methane in China[J]. Natural Gas Industry, 2005, 25(1):1-7. doi: 10.3321/j.issn:1000-0976.2005.01.002 [3] 程宇雄, 李根生, 王海柱, 等.超临界CO2连续油管喷射压裂可行性分析[J].石油钻采工艺, 2013(6):73-77. http://d.old.wanfangdata.com.cn/Periodical/syzcgy201306018Cheng Yuxiong, Li Gensheng, Wang Haizhu, et al. Feasibility analysis on coiled-tubing jet fracturing with supercritical CO2[J]. Oil Drilling & Production Technology, 2013(6):73-77. http://d.old.wanfangdata.com.cn/Periodical/syzcgy201306018 [4] Cohen J H, Deskins W G, Rogers J D. High-pressure jet kerf drilling shows significant potential to increase ROP[C]//The Society of Petroleum Engineers, Annual Technical Conference and Exhibition. Dallas, Texas, 2005. http://www.maurerengineering.com/wp-content/uploads/2015/11/JET-KERF-DRILLING.pdf [5] 廖华林, 李根生.水射流冲击含饱和流体岩石介质耦合机理分析[J].岩石力学与工程学报, 2005, 24(15):2697-2703. doi: 10.3321/j.issn:1000-6915.2005.15.016Liao Hualin, Li Gensheng. Fluid-structure interaction mechanism of water jet imping rock with saturated fluid[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15):2697-2703. doi: 10.3321/j.issn:1000-6915.2005.15.016 [6] Butler T, Fontana P, Ottawa R. A method for combined jet and mechanical drilling[C]//The Society of Petroleum Engineers, Annual Technical Conference and Exhibition. New Orleans, Louisiana, 1990. https://www.onepetro.org/conference-paper/SPE-20460-MS [7] Kolle J J, Marvin M H. Jet assisted drilling with supercritical carbon dioxide[C]//SPE/CIM International Conference on Horizontal Well Technology. Calgary, Alberta, Canada, 2002. https://www.researchgate.net/publication/237714697_JET-ASSISTED_DRILLING_WITH_SUPERCRITICAL_CARBON_DIOXIDE [8] Kolle J J, Ottawa R, Stang D L. Laboratory and field testing of an ultra-high pressure, jet-assisted drilling system[C]//SPE/IADC Drilling Conference. Amsterdam, Netherlands, 1991. https://www.onepetro.org/conference-paper/SPE-22000-MS [9] 廖华林, 李根生, 熊伟, 等.超高压水射流辅助破岩钻孔研究进展[J].岩石力学与工程学报, 2002, 21(2):2583-2587. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb2002z2062Liao Hualin, Li Gensheng, Xiong Wei, et al. Development of ultra-high pressure waterjet assisted drilling technology[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(2):2583-2587. http://d.old.wanfangdata.com.cn/Periodical/yslxygcxb2002z2062 [10] 王海柱, 李根生, 沈忠厚, 等.超临界CO2钻井与未来钻井技术发展[J].特种油气藏, 2012, 19(2):1-5. doi: 10.3969/j.issn.1006-6535.2012.02.001Wang Haizhu, Li Gensheng, Shen Zhonghou, et al. Supercritical carbon dioxide drilling and the development of future drilling technology[J]. Special Oil & Gas Reservoirs, 2012, 19(2):1-5. doi: 10.3969/j.issn.1006-6535.2012.02.001 [11] 罗洪斌, 李根生, 宋剑, 等.同轴旋转双射流冲蚀岩石机制与实验研究[J].岩石力学工程学报, 2008, 27(增1):2754-2759. http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2008S1029.htmLuo Hongbin, Li Gensheng, Song Jian, et al. Experimental study on rock breaking mechanism of coaxial swirl dual-jet[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(Suppl 1):2754-2759. http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2008S1029.htm [12] Kolle J J. Coiled tubing drilling with supercritical carbon dioxide: 6347675[P]. United States Patent, 2002. [13] 沈忠厚, 王海柱, 李根生, 等.超临界CO2钻井水平井段携岩能力数值模拟[J].石油勘探与开发, 2011, 38(2):233-236. http://d.old.wanfangdata.com.cn/Periodical/syktykf201102016Shen Zhonghou, Wang Haizhu, Li Gensheng, et al. Numerical simulation of the cutting-carring ability of supercritical carbon dioxide drilling at horizontal section[J]. Petroleum Exploration and Development, 2011, 38(2):233-236. http://d.old.wanfangdata.com.cn/Periodical/syktykf201102016 [14] 杜玉昆, 王瑞和, 倪红坚, 等.超临界二氧化碳射流破岩试验[J].中国石油大学学报:自然科学版, 2012, 36(4):93-96. http://d.old.wanfangdata.com.cn/Periodical/sydxxb201204017Du Yukun, Wang Ruihe, Ni Hongjian, et al. Rock-breaking experiment with supercritical carbon dioxide jet[J]. Journal of China University of Petroleum: Edition of Natural Science, 2012, 36(4):93-96. http://d.old.wanfangdata.com.cn/Periodical/sydxxb201204017 [15] 吴为, 李根生, 牛继磊, 等.直旋混合射流破岩钻孔参数试验研究[J].流体机械, 2009, 37(6):1-6. doi: 10.3969/j.issn.1005-0329.2009.06.001Wu Wei, Li Gensheng, Niu Jilei, et al. Experim ental study on rock breaking parameters of combined swirling and round jet[J]. Fluid Machinery, 2009, 37(6):1-6. doi: 10.3969/j.issn.1005-0329.2009.06.001 [16] 廖华林, 李根生, 牛继磊, 等.径向水平井直旋混合射流钻头破岩特性[J].应用基础与工程科学学报, 2013, 21(3):471-478. doi: 10.3969/j.issn.1005-0930.2013.03.009Liao Hualin, Li Gensheng, Niu Jilei, et al. Rock breaking characteristic of integrating straight and swirling jet bit for radial horizontal drilling[J]. Journal of Basic Science and Engineering, 2013, 21(3):471-478. doi: 10.3969/j.issn.1005-0930.2013.03.009 [17] 廖华林, 李根生, 牛继磊, 等.径向水平钻孔直旋混合射流钻头设计与破岩特性[J].煤炭学报, 2013, 38(3):424-429. http://d.old.wanfangdata.com.cn/Periodical/mtxb201303012Liao Hualin, Li Gensheng, Niu Jilei, et al. Integrating straight & swirl jets bit design and its rock breaking characteristics for radial horizontal hole drilling[J]. Journal of China Coal Society, 2013, 38(3):424-429. http://d.old.wanfangdata.com.cn/Periodical/mtxb201303012 [18] 廖华林, 李根生, 李敬彬, 等.径向水平钻孔直旋混合射流喷嘴流场特性分析[J].煤炭学报, 2012, 37(11):1895-1900. http://d.old.wanfangdata.com.cn/Periodical/mtxb201211022Liao Hualin, Li Gensheng, Li Jingbin, et al. Flow field study on Integrating straight and swirling jets for radial horizontal drilling[J]. Journal of China Coal Society, 2012, 37(11):1895-1900. http://d.old.wanfangdata.com.cn/Periodical/mtxb201211022 [19] 步玉环, 王瑞和, 周卫东, 等.旋转射流破岩成孔规律研究[J].岩石力学与工程学报, 2003, 22(4):664-668. doi: 10.3321/j.issn:1000-6915.2003.04.031Bu Yuhuan, Wang Ruihe, Zhou Weidong, et al. Study on rock drilling by swirling jet[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(4):664-668. doi: 10.3321/j.issn:1000-6915.2003.04.031 -
图(12) / 表(1)
计量
- 文章访问数: 4048
- HTML全文浏览量: 1125
- PDF下载量: 562
- 被引次数: 0