Abstract
Well workover is an indispensable production link in oilfield development. Hot washing is an important measure to maintain normal production of oil wells before well workover. Based on the principle of “source control” of pollution prevention and control in oilfield production, this paper guarantees that crude oil does not fall to the ground, adopts the way of adding chemicals to wash wells, takes the wellbore production string as the starting point of prevention and control, and uses the unique properties of surfactants, develops a new type of well-washing fluid system, which can effectively reduce the field dispensing temperature. The system can wash oil more than 90% at 65 °C, and the concentration of chemicals is 0.6%. The interfacial tension between oil and water decreases to 10–4 MN/m. Effectively avoid oil pollution from wellbore when workover operation, resulting in surface and environmental pollution. The expected goal has been achieved through well washing experiments of more than 10 oil wells before workover operation.
Copyright 2019, IPPTC Organizing Committee.
This paper was prepared for presentation at the 2019 International Petroleum and Petrochemical Technology Conference in Beijing, China, 27–29, March, 2019.
This paper was selected for presentation by the IPPTC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IPPTC Technical Committee and are subject to correction by the author(s). The material does not necessarily reflect any position of the IPPTC Technical Committee, its members. Papers presented at the Conference are subject to publication review by Professional Team of Petroleum Engineering of the IPPTC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of Shaanxi Petroleum Society is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IPPTC. Contact email: paper@ipptc.org.
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Su, N. et al. (2020). Research and Application of High Efficiency Well Flushing Fluid System. In: Lin, J. (eds) Proceedings of the International Petroleum and Petrochemical Technology Conference 2019. IPPTC 2019. Springer, Singapore. https://doi.org/10.1007/978-981-15-0860-8_24
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DOI: https://doi.org/10.1007/978-981-15-0860-8_24
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