Experimental Study on the Discharging Characteristics of Pulsed High-voltage Discharge Technology in Oil Plug Removal

  • Bingnan Yan School of Electrical Engineering Xi’an Jiaotong University
  • Jing Zhou School of Xi’an Shiyou University
  • Zhao Liang Xi’An Thermal Power Research Institute Co.Ltd
  • Liu Chongxin School of Electrical Engineering Xi’an Jiaotong University
  • Fanli Meng University at Buffalo, the State University of New York


Oil plugging of downhole during oilfield development leads to a decline in well yield. A new plug removal method basedon pulsed high-voltage discharge technology was proposed in this paper to solve this plugging problem. A low-carbon steelhigh-pressure sealed drum was developed to simulate downhole operating environment with high static pressure. Four sealedcontact pins were designed on the drum cover. These pins were used to insert the high-voltage cable into drum body whileensuring the leakproofness of the drum. The maximum static pressure borne by the drum was 40 MPa. An experimentalsystem of pulsed high-voltage discharge was designed based on the drum. A platform for discharging experiment wasestablished according to the system principle diagram. The effects of variation in static pressure on discharging voltage,discharging current, critical breakdown field strength, discharging time and its data discretization, and other parameters weredetermined with water and crude oil as the discharging media. Experimental results indicate that increasing static pressureincreases discharging time, enhances pulsed discharging randomness, reduces strength of impact waves generated in thedischarging media, and weakens fracture-generating effect on the cement tube. Increasing the working voltage is necessaryto achieve better plug removal. However, the requirements for size, texture, and insulativity of a plug removal equipment arecorrespondingly elevated. This study provides a basis for the application of pulsed high-voltage discharge technology in oilreservoir plug removal.


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How to Cite
YAN, Bingnan et al. Experimental Study on the Discharging Characteristics of Pulsed High-voltage Discharge Technology in Oil Plug Removal. Journal of Power Technologies, [S.l.], v. 96, n. 4, p. 261--269, dec. 2016. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/976>. Date accessed: 17 sep. 2021.
Energy Engineering and Technology


Plug Removal Technology, Pulsed High-Voltage Discharge, Static Pressure, Discharging Characteristic

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