Experimental study on the discharging characteristics of pulsed high-voltage discharge technology in oil plug removal

• Autorzy: Bingnan, Y. , Jing, Z. , Liang, Z. , Chongxin, L. , Meng, F.
• Języki publikacji: EN

Abstrakty

EN

Oil plugging of the downhole during oilfield development leads to a decline in well yield. A new plug removal method based on pulsed high-voltage discharge technology was proposed in this paper to solve this plugging problem. A low-carbon steel high-pressure sealed drum was developed to simulate a downhole operating environment with high static pressure. Four sealed contact pins were designed on the drum cover. These pins were used to insert the high-voltage cable into the drum body while ensuring the drum is leakproof. The maximum static pressure borne by the drum was 40 MPa. An experimental system of pulsed high-voltage discharge was designed based on the drum. A platform for the discharging experiment was established 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 were determined with water and crude oil as the discharging media. Experimental results indicate that increasing static pressure increases discharging time, enhances pulsed discharging randomness, reduces the strength of impact waves generated in the discharging media, and weakens the fracture-generating effect on the cement tube. Increasing the working voltage achieves better plug removal. However, the requirements for size, texture, and insulativity of plug removal equipment are elevated accordingly. This study provides a basis for the application of pulsed high-voltage discharge technology in oil reservoir plug removal.

Słowa kluczowe

PL

technologia usuwania wtyczek; wyładowania elektryczne wysokonapięciowe; wyładowania elektryczne impulsowe; ciśnienie statyczne; charakterystyka wyładowań

EN

plug removal technology; pulsed high-voltage discharge; static pressure; discharging characteristic

• Czasopismo: Journal of Power Technologies
• Rocznik: 2016
• Tom: Vol. 96, nr 4
• Strony: 261--268
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Bingnan, Y.

• School of Electrical Engineering Xi'an Jiaotong University, Xi'an , 710049, China,
• School of Xi'an Shiyou University, Xi'an, 710065, China

autor

Jing, Z.

• School of Xi'an Shiyou University, Xi'an, 710065, China

autor

Liang, Z.

• Xi'An Thermal Power Research Institute Co. Ltd, Xi'an, 710054 , China

autor

Chongxin, L.

• School of Electrical Engineering Xi'an Jiaotong University, Xi'an , 710049, China

autor

Meng, F.

• University at Buffalo, the State University of New York, 14260-1800, United States

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).