Effect of cavity diameter ratio on the pulse performance of self-excited oscillation pulsed supercritical carbon dioxide jet

被引：0
|
作者：
Wei J. [1 ,2 ]
Cui J. [1 ,2 ]
Zhang T. [1 ,2 ]
Shen H. [1 ,2 ]
Si L. [1 ,2 ]
机构：
[1] State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo
[2] State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Jiaozuo
来源：
Meitan Xuebao/Journal of the China Coal Society | 2022年 / 47卷 / 09期
关键词：
cavity diameter ratio; coalbed methane drilling; pulse jet; self-excited oscillation; supercritical carbon dioxide;
D O I：
10.13225/j.cnki.jccs.SS22.0473
中图分类号：
学科分类号：
摘要：
Low well wall stability and low permeability of the coal seam are key factors limiting the extraction of coalbed methane. Supercritical carbon dioxide jet drilling technology has its unique advantages in coalbed methane extraction. Due to its high density,low viscosity and strong diffusivity,it not only enhances well wall stability and recovery rates,but also enables underground storage of carbon dioxide. However,the high-energy consumption of the system limits the application of supercritical carbon dioxide jet drilling technology. On this basis,the self-excited oscillation pulsed supercritical carbon dioxide jet technology reduces the system energy consumption and promotes the application of carbon utilization and storage technology. In order to enrich and improve the theory of self-excited oscillation pulsed supercritical carbon dioxide jet,the effect of cavity diameter ratio on the performance of self-excited oscillation pulsed supercritical carbon dioxide jet was investigated. Based on the flow field structure,various numerical simulations were used to select a range of cavity diameter ratios suitable for the self-excited oscillation pulsed supercritical carbon dioxide jets and to analyze the effect of cavity diameter ratio on the pulse performance of the jets. The effect of the cavity diameter ratio on the pulse pressure of the self-excited oscillation pulsed supercritical carbon dioxide jet was investigated. The self-excited oscillation pulsed supercritical carbon dioxide jet breaking experiments were carried out using the self-excited oscillation pulsed supercritical carbon dioxide jet rock breakage experimental system under different cavity diameter ratios to compare and verify the pulse performance of the jet under different cavity diameter ratios. The results show that the cavity diameter ratio is not an isolated factor,but is related to the upstream nozzle diameter to influence the pulse performance of the jet and the coal breakage effect. The higher the matching ratio,the higher the pulse pressure of the self-excited oscillation pulsed supercritical carbon dioxide jet and the better the coal breakage effect. When the upstream nozzle diameters are 2.6 mm and 2.4 mm,and the cavity diameter ratios are 3.5 and 3.0 respectively,the pulse performance of the self-excited oscillation pulse supercritical carbon dioxide jet is the best and the coal breakage efficiency is the highest. © 2022 China Coal Society. All rights reserved.
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页码：3239 / 3249
页数：10
相关论文
共 21 条
  • [1] (2021)
  • [2] LIU Jianzhong, SUN Haitao, LEI Yi, Et al., Current situation and development trend of coalbed methane exploitation and utilization technology in coal mine area, Journal of China Coal Society, 45, 1, pp. 258-267, (2020)
  • [3] SUNQinping, ZHAO Qun, JIANG Xinchun, Et al., Prospects and countermeasures of coal bed methane exploration and development in china under the new situation [J], Journal of China Coal Society, 46, 1, pp. 65-76, (2021)
  • [4] ZHAO Jiechao, GUO Deyong, Cracking mechanism of coal under high-pressure water jet and its applications for enhanced coalbed methane drainage[ J], Arabian Journal of Geosciences, 11, 15, pp. 1-14, (2018)
  • [5] LIU Bailong, SUZUKI Anna, ITO Takatoshi, Estimating the seepage effect of SC-CO<sub>2</sub> and water fracturing with a steady-state flow model considering capillary and viscous forces at the pore scale[J], Journal of Petroleum Science and Engineering, 184, (2019)
  • [6] HUANG Fei, LU Yiyu, TANG Jiren, Et al., Experimental study on shale erosion by supercritical carbon dioxide jet, Chinese Journal of Rock Mechanics and Engineering, 34, 4, pp. 787-794, (2015)
  • [7] DU Yukun, Study on the rock-breaking mechanism of supercritical carbon dioxide jet, (2012)
  • [8] MENG M, QIU Z., Experiment study of mechanical properties and mi-crostructures of bituminous coals influenced by supercritical carbon dioxide [J], Fuel, 219, pp. 223-238, (2018)
  • [9] LIU Yong, ZHANG Juan, WEI Jianping, Et al., Impact pressure distribution of an SC-CO<sub>2</sub> jet used in rock breakage, Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 8, 1, pp. 1-15, (2021)
  • [10] LIS hugang, ZHANG Jingfei, SHANG Jianxuan, Et al., Conception and connotation of coal and gas co-extraction technology system under the goal of carbon peak and carbon neutrality, Journal of China Coal Society, 47, 4, pp. 1416-1429, (2022)
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