Experimental Study on the Discharging Characteristics of Pulsed High-voltage Discharge Technology in Oil Plug Removal
Abstract
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.References
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ultrasonic wave, chemical deplugging agent and ultrasound–chemical
combination deplugging for near-well ultrasonic processing technology,
Ultrasonics sonochemistry 27 (2015) 339–344.
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Vielma, E. Bustamante, et al., First successful deployment of a costeffective
chemical plug to stimulate selectively using ct in saudi arabia
gas fields-a case history, in: SPE Saudi Arabia Section Technical Symposium
and Exhibition, Society of Petroleum Engineers, 2012.
[3] C. Pu, D. Shi, S. Zhao, H. Xu, H. Shen, Technology of removing near
wellbore inorganic scale damage by high power ultrasonic treatment,
Petroleum Exploration and Development 38 (2) (2011) 243–248.
[4] P. Poesio, G. Ooms, Removal of particle bridges from a porous material
by ultrasonic irradiation, Transport in porous media 66 (3) (2007)
235–257.
[5] Y. Sun, G. Zuo, The transferring spark source used in dredging oil well,
High Voltage Engineering 26 (4) (2000) 31–32.
[6] R. Zhang, Y. Xiang, J. Song, The reservoir treatment effect based on
low frequency pulse treatment, Petroleum Exploration And Development
28 (5) (2001) 88–90.
[7] I. V. Timoshkin, J. W. Mackersie, S. J. MacGregor, Plasma channel
miniature hole drilling technology, IEEE Transactions on plasma science
32 (5) (2004) 2055–2061.
[8] M. Wilson, L. Balmer, M. Given, S. MacGregor, I. Timoshkin, An investigation
of spark discharge parameters for material processing with
high power ultrasound, Minerals Engineering 20 (12) (2007) 1159–
1169.
[9] R. Fu, J. Zhou, Y. Sun, et al., Application of high voltage pulse discharge
in rock fracturing without confining pressure, High Voltage Engineering
41 (12) (2015) 4055–4059.
[10] Z. Tang, C.-h. Tang, H. Gong, A high energy density asymmetric supercapacitor
from nano-architectured ni (oh) 2/carbon nanotube electrodes,
Advanced Functional Materials 22 (6) (2012) 1272–1278.
[11] B. M. Kovalchuk, A. Kharlov, V. Vizir, V. Kumpyak, V. Zorin, V. Kiselev,
High-voltage pulsed generator for dynamic fragmentation of rocks,
Review of Scientific Instruments 81 (10) (2010) 103506.
[12] A. F. Gutsol, W. R. Pyle, Electro-hydrodynamic and plasma phenomena
in corona—liquid interaction, in: 2013 19th IEEE Pulsed Power
Conference (PPC), IEEE, 2013, pp. 1–5.
[13] M. Given, I. Timoshkin, M. Wilson, S. MacGregor, J. Lehr, Analysis of
the current waveforms observed in underwater spark discharges, in:
Plasma Science, 2007. ICOPS 2007. IEEE 34th International Conference
on, IEEE, 2007, pp. 146–146.
[14] J. J. Rassweiler, T. Knoll, K.-U. Köhrmann, J. A. McAteer, J. E. Lingeman,
R. O. Cleveland, M. R. Bailey, C. Chaussy, Shock wave technology
and application: an update, European urology 59 (5) (2011)
784–796.
[15] T. Pontes, Case study, downhole testing tools for formation evaluation
in high-pressure and high-temperature environments, in: Nigeria Annual
International Conference and Exhibition (NAICE’10), Louisiana,
USA, 2010, pp. 1–8.
[16] J. R. Haddad, A. Salguero, C. Jaimes, et al., Application of telemetry
technology in high-pressure wells to improve data accuracy in drill
stem tests, in: SPE Oil and Gas India Conference and Exhibition, Society
of Petroleum Engineers, 2010.
[17] S. F. Golovashchenko, A. J. Gillard, A. V. Mamutov, J. F. Bonnen,
Z. Tang, Electrohydraulic trimming of advanced and ultra high strength
steels, Journal of Materials Processing Technology 214 (4) (2014)
1027–1043.
[18] Z. Li, Y. Liu, Y. Han, et al., Erosion mechanism research of metal
electrode under pulse current in water, High Power Laser and Particle
Beams 28 (4) (2016) 045007–045007–7.
Published
2016-12-04
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: 23 nov. 2024.
Issue
Section
Energy Engineering and Technology
Keywords
Plug Removal Technology, Pulsed High-Voltage Discharge, Static Pressure, Discharging Characteristic
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