Study on ESP String for Super Heavy Oil Exploitation in Tahe Oil Field

Abstract:

During the process of super heavy oil exploitation in Tahe oil field, when mixing light oil, due to heavy oil and light oil entering into pump from separator directly, the existing ESP string leads to poor mixing and heavy oil coming into the pump, as a result, the pump detection period is greatly shorten; when water injection-production, the injected water can contact with electrical cable and motor directly, causing serious damage to the cable and motor, and the pump detection period is also greatly shorten. This paper designs a new type of ESP string, adding a ESP dome, a sieve tube, a mixing device, an intelligent switch and a direct flushing valve, which can improve the mixing effect of heavy oil and light oil, avoid the injected water directly contacting with electrical cable and motor, in order to protect the electrical cable and motor, improve their service life, extend the pump detection period and reduce production costs. Field test showed that the pump detection period has been prolonged after using the new ESP string, it is recommended to promote the use.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 1577-1580
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.1577
• Online since: May 2012
• Authors: Zhi Qiang Huang, Cheng Song Qiu, Qin Li, Ya Chao Ma, Li Yan Liu
• Keywords: Direct Flushing Valve, Dome, ESP String, Intelligent Switch, Super Heavy Oil

References

[1] Mei Chunming, Li Bolin. Mixing Light Oil to Reduce Oil Viscosity in Tahe Oilfield[J]. Petroleum Drilling Techniques, 2009,37(1):73-76

[2] ZHANG Rong-jun, LI Hai-jun, et al. Viscosity reducing recovery technology of the deep heavy oil of Tahe Oilfield by mixing light oil[J]. Journal of Xi'an Shiyou University(Natural Science Edition), 2009,24(3):84-87.

[3] Yadong Yang, Zhaozhong Yang, et al. Application of Water-Flood Huff and Puff with Single Well in Tahe Oilfield[J]. Natural Gas Exploration and Development, 2006,29(2):32-35.

[4] Chaodong Wu,Sheng Li,et al, Techniques for Oil production by Intelligent Downhole Water Searching,Plugging and Stratification[J]. Journal of Oil and Gas Technology. 2008,30(3):376-378.

[5] Ning Chen,Chengshuang Liu,et al. Research and Application of Intelligent Water Detection and Hierarchical Test Technology[J]. Drilling & Production Technology. 2008,31(S1):68-73.